USF340 Rhopoint Components, USF340 Datasheet - Page 2

• Manufacturer Part Number: USF340
• Description: Type Usf Ultra-stable Low Tc Film Resistors
• Manufacturer: Rhopoint Components

2
Derating Curve:
RHOPOINT COMPONENTS LTD.
Holland Road
Hurst Green
Oxted, Surrey, RH8 9AX
the Type MG Precision High Voltage Resistors' outstanding
combination of performance features:
•
•
•
•
•
•
many years of use in equipment that demands the highest
reliability and stability, including TWT amplifiers, X-ray
systems, geophysical instruments, and medical electronics.
© 2004 Caddock Electronics, Inc.
Applications Engineering
17271 North Umpqua Hwy.
Roseburg, Oregon 97470-9422
Phone: [phone]
Fax: [phone]
UK & Ireland
Distributors
© 2004 Caddock Electronics, Inc.
Temperature Coefficient as tight as 80 ppm/°C, Combined with Excellent Long-Term Stability and Precision Tolerances.
the Type MG Precision High Voltage Resistors' outstanding
combination of performance features:
•
•
•
•
•
•
many years of use in equipment that demands the highest
reliability and stability, including TWT amplifiers, X-ray
systems, geophysical instruments, and medical electronics.
Applications Engineering
17271 North Umpqua Hwy.
Roseburg, Oregon 97470-9422
Phone: [phone]
Fax: [phone]
Temperature Coefficient as tight as 80 ppm/°C, Combined with Excellent Long-Term Stability and Precision Tolerances.
the Type MG Precision High Voltage Resistors' outstanding
combination of performance features:
•
•
•
•
•
the Type MG Precision High Voltage Resistors' outstanding
combination of performance features:
•
•
•
•
many years of use in equipment that demands the highest
•
reliability and stability, including TWT amplifiers, X-ray
•
systems, geophysical instruments, and medical electronics.
•
© 2003 Caddock Electronics, Inc.
many years of use in equipment that demands the highest
reliability and stability, including TWT amplifiers, X-ray
systems, geophysical instruments, and medical electronics.
Temperature Coefficient as tight as 80 ppm/°C, Combined with Excellent Long-Term Stability and Precision Tolerances.
Temperature Coefficient as tight as 80 ppm/°C, Combined with Excellent Long-Term Stability and Precision Tolerances.
RHOPOINT COMPONENTS LTD
Holland Road, Hurst Green,
Oxted, Surrey, RH8 9AX
ENGLAND
of
MG650
MG655
MG660
MG680
MG710
MG712
MG714
MG715
MG716
MG717
MG720
MG721
MG725
MG730
MG731
MG735
MG740
MG745
MG750
MG780
MG785
MG810
MG815
990 K
9.90 Meg
MG650
MG655
MG660
MG680
MG710
MG712
MG714
MG715
MG716
MG717
MG720
MG721
MG725
MG730
MG731
MG735
DIMENSIONS IN INCHES AND (MILLIMETERS)
MG740
MG745
MG750
MG780
MG785
MG810
MG815
Standard Resistance Values:
USF240 Standard Resistance Values:
Absolute Tolerance: 0.01% or 0.10%, Absolute TC: 2ppm/C
50.0 
100 
200 
250 
USF270 Standard Resistance Values:
Absolute Tolerance: 0.01% or 0.10%, Absolute TC: 2ppm/C
USF271 Standard Resistance Values:
Absolute Tolerance: 0.01% or 0.10%, Absolute TC: 2ppm/C
USF340 Standard Resistance Values:
Absolute Tolerance: 0.01% or 0.10%, Absolute TC: 5ppm/C
50.0 
100 
200 
350 
USF370 Standard Resistance Values:
Absolute Tolerance: 0.01% or 0.10%, Absolute TC: 5ppm/C
990 K
1.00 Meg
USF371 Standard Resistance Values:
Absolute Tolerance: 0.01% or 0.10%, Absolute TC: 5ppm/C
19.8 Meg
Model
Specifications:
Resistance Tolerance: 0.01% or 0.10 measured at +23C 2C.
Absolute Temperature Coefficient: TC referenced to +25C,

Load Life Stability: 2,000 hours at +85C at rated voltage, not to
exceed rated power,
10,000 hours at +85C at rated voltage, not to exceed rated
power,
Thermal Shock: Mil-Std-202 Method 107 condition A, except min.
temp. is -40C,
Voltage Coefficient: USF270 at 5 Meg, and USF271, USF370,
USF371 at resistances of 9 Meg or greater, 0.02 ppm/volt
maximum.
Shelf Life Stability: Typical +(20ppm 20ppm)/yr after 1 year.
Extended shelf life (ten years) 10ppm/year maximum.
Operating Temperature: -40C to +85C.
Leadwire: Solder Coated Copper
Model
MG650
MG655
MG660
MG680
MG710
Ordering Information USF200 Series:
Ordering Information USF300 Series:
Single-resistor values as high as 10,000 Megohms.
Maximum continuous operating voltages as high as
48,000 volts ("-15" ratings).
Overvoltage capabilities of 150% of standard working
voltages for all models and values, (except "-15" ratings).
Resistance Tolerances from ±1.0% to ±0.1%.
Temperature Coefficient, for standard resistance range, of
80 ppm/°C in combination with resistance tolerances as
tight as ±0.1%.
Type MG resistors have demonstrated stability of 0.01%
per 1,000 hours in extended load life testing of standard
resistance range values.
Model
Model
Single-resistor values as high as 10,000 Megohms.
Maximum continuous operating voltages as high as
48,000 volts ("-15" ratings).
Overvoltage capabilities of 150% of standard working
voltages for all models and values, (except "-15" ratings).
Resistance Tolerances from ±1.0% to ±0.1%.
Temperature Coefficient, for standard resistance range, of
80 ppm/°C in combination with resistance tolerances as
tight as ±0.1%.
Type MG resistors have demonstrated stability of 0.01%
per 1,000 hours in extended load life testing of standard
resistance range values.
No.
Single-resistor values as high as 10,000 Megohms.
Maximum continuous operating voltages as high as
Certain products shown in this catalog are covered by one or more patents, there are also patents pending.
48,000 volts ("-15" ratings).
Overvoltage capabilities of 150% of standard working
voltages for all models and values, (except "-15" ratings).
Resistance Tolerances from ±1.0% to ±0.1%.
Temperature Coefficient, for standard resistance range, of
80 ppm/°C in combination with resistance tolerances as
tight as ±0.1%.
Single-resistor values as high as 10,000 Megohms.
Type MG resistors have demonstrated stability of 0.01%
Maximum continuous operating voltages as high as
per 1,000 hours in extended load life testing of standard
48,000 volts ("-15" ratings).
resistance range values.
Overvoltage capabilities of 150% of standard working
voltages for all models and values, (except "-15" ratings).
Resistance Tolerances from ±1.0% to ±0.1%.
Temperature Coefficient, for standard resistance range, of
80 ppm/°C in combination with resistance tolerances as
tight as ±0.1%.
Type MG resistors have demonstrated stability of 0.01%
per 1,000 hours in extended load life testing of standard
resistance range values.
No.
MG 660
MG 680
MG 710
MG 712
MG 714
MG 715
MG 716
MG 720
MG 725
MG 717
MG 721
MG 730
MG 735
MG 745
MG 731
R taken at -40C to +85C.
MG 740
MG 750
MG 780
MG 785
MG 810
MG 815
MG 650
MG 655
No.
RHOPOINT COMPONENTS LTD
Holland Road, Hurst Green,
Oxted, Surrey, RH8 9AX
ENGLAND
© 2003 Caddock Electronics, Inc.
2
Caddock's Micronox
This exceptional performance has been proven through
Caddock's Micronox
This exceptional performance has been proven through
Caddock's Micronox
Caddock's Micronox
This exceptional performance has been proven through
This exceptional performance has been proven through
The USF Ultra-Stable Low TC Ultra-Precision Film Resistors were
developed to meet the requirements for increasing performance for
resistors in high performance analog electronics. Utilizing Caddock
proprietary resistance film systems the Type USF resistors provide
the Lowest TC with the Widest Resistance Range and the Highest
Voltage Ratings available in the industry.
•
•
•
•
•
•
Type USF Ultra-Stable Resistors are offered in standard resistance values
that are most commonly used in precision analog design. These standard
resistance values can be used in precise amplifier gain setting, precise
resistor bridge circuits, precise transducer sense circuits and precise
voltage dividers with up to 2500 volt input voltage.
Extremely Low Power Coefficient (Wattage Coefficient): Type USF
resistors are constructed with an aluminum oxide ceramic sandwich
which provides great thermal conductivity. The ceramic sandwich
package very effectively minimizes the power coefficient drift. Power
coefficient is the resistance drift due to temperature rise in the element
caused by the power (wattage) dissipation in the resistor where the self-
heating temperature rise of the resistor element results in TC drift (temp
rise in C, times the temperature coefficient of the resistor). In the USF
package, heat is pulled away from the resistance material efficiently by
this ceramic sandwich package construction. Plastic molded Low TC foil
resistors cannot provide this outstanding benefit since the plastic impedes
the flow of heat, causing greater temperature rise at the resistor element
and greater self heating related resistance drift due to power dissipation.
The USF 200 Series resistors provide a new level of performance with
near ZERO TC, very low power coefficient, wide resistance range and
higher voltage ratings than is offered by other resistor technologies.
Absolute Tol. to
Page
RHOPOINT COMPONENTS LTD
Holland Road, Hurst Green,
Oxted, Surrey, RH8 9AX
ENGLAND
© 2003 Caddock Electronics, Inc.
(38.10 ± 3.18)
The USF Ultra-Stable Low TC Ultra-Precision Film Resistors were
developed to meet the requirements for increasing performance for
resistors in high performance analog electronics. Utilizing Caddock
proprietary resistance film systems the Type USF resistors provide
the Lowest TC with the Widest Resistance Range and the Highest
Voltage Ratings available in the industry.
•
•
•
•
•
•
Type USF Ultra-Stable Resistors are offered in standard resistance values
that are most commonly used in precision analog design. These standard
resistance values can be used in precise amplifier gain setting, precise
resistor bridge circuits, precise transducer sense circuits and precise
voltage dividers with up to 2500 volt input voltage.
Extremely Low Power Coefficient (Wattage Coefficient): Type USF
resistors are constructed with an aluminum oxide ceramic sandwich
which provides great thermal conductivity. The ceramic sandwich
package very effectively minimizes the power coefficient drift. Power
coefficient is the resistance drift due to temperature rise in the element
caused by the power (wattage) dissipation in the resistor where the self-
heating temperature rise of the resistor element results in TC drift (temp
rise in C, times the temperature coefficient of the resistor). In the USF
package, heat is pulled away from the resistance material efficiently by
this ceramic sandwich package construction. Plastic molded Low TC foil
resistors cannot provide this outstanding benefit since the plastic impedes
the flow of heat, causing greater temperature rise at the resistor element
and greater self heating related resistance drift due to power dissipation.
The USF 200 Series resistors provide a new level of performance with
near ZERO TC, very low power coefficient, wide resistance range and
higher voltage ratings than is offered by other resistor technologies.
Model Number
1.500 ± .125
Absolute Tol. to
Now with Extended Resistance Range to 10,000 Megohms and Additional Models
300 Series — ZERO Nominal TC — Maximum Absolute TC 5 ppm/C
Models with low inductance construction are in shaded areas.
Now with Extended Resistance Range to 10,000 Megohms and Additional Models
Watt-
Models with Caddock's Non-Inductive Resistance Pattern are in non-shaded areas.
Models with low inductance construction are in shaded areas.
Resistance Range 50 ohm to 20 Megohm
Temperature Coefficient -40C to +85C, referenced to +25C
200 Series — ZERO Nominal TC — Maximum Absolute TC 2 ppm/C
Tolerance: 0.01% or 0.10%
Specific standard resistance values are available that are most
commonly required in high accuracy analog design. These values
were selected and optimized for produceability and performance.
300 Series “matched pairs” are available with ratio TC as tight as
0.5 ppm/C. Contact Applications Engineering.
Ceramic package provides cool operation.
Watt-
Derating Curve:
Models with Caddock's Non-Inductive Resistance Pattern are in non-shaded areas.
Now with Extended Resistance Range to 10,000 Megohms and Additional Models
Now with Extended Resistance Range to 10,000 Megohms and Additional Models
10.0
15.0
RHOPOINT COMPONENTS LTD.
Holland Road
Hurst Green
Oxted, Surrey, RH8 9AX
age
10.0
15.0
Watt-
Watt-
1.00 Meg 2.00 Meg
0.5
0.5
0.6
0.8
1.0
0.6

1.0
1.0
1.5
1.5
2.0
2.0
2.5
3.0
2.6
3.6
3.6
5.0
5.0
7.5
8.0
age
0.5
0.5
0.6
0.8
1.0
0.6
1.0
1.0
1.5
1.5
2.0
2.0
2.5
3.0
2.6
3.6
3.6
5.0
5.0
7.5
8.0
350 
500 
900 
1.00 K
USF271
USF340
USF370
USF371
age
9.99 Meg 10.0 Meg
400 
500 
700 
1.00 K
Model Number
USF240
USF270
0.5
0.5
0.6
0.8
1.0
RATED POWER OR
RATED VOLTAGE, %
1.98 Meg
2.00 Meg
19.98 Meg 20.0 Meg
DIMENSIONS IN INCHES AND (MILLIMETERS)
300 Series — ZERO Nominal TC — Maximum Absolute TC 5 ppm/C
R (+0.030 0.030)% max.
Resistance Range 50 ohm to 20 Megohm
Temperature Coefficient -40C to +85C, referenced to +25C
200 Series — ZERO Nominal TC — Maximum Absolute TC 2 ppm/C
Tolerance: 0.01% or 0.10%
Specific standard resistance values are available that are most
commonly required in high accuracy analog design. These values
were selected and optimized for produceability and performance.
300 Series “matched pairs” are available with ratio TC as tight as
0.5 ppm/C. Contact Applications Engineering.
Ceramic package provides cool operation.
Certain products shown in this catalog are covered by one or more patents, there are also patents pending.
Type USF Ultra-Stable Low TC Film Resistors
USF271
USF340
USF370
USF371
MG 650
MG 655
MG 660
MG 680
MG 710
MG 712
MG 714
MG 715
MG 716
MG 720
MG 725
MG 717
MG 721
MG 730
MG 735
MG 745
MG 731
MG 740
MG 750
MG 780
MG 785
MG 810
MG 815
USF240
USF270
Resistors
Model Number
Model Number
Continuous
Type USF Ultra-Stable Low TC Film Resistors
Continuous
Oper. Volt.
Continuous
Type MG Precision High Voltage Resistors
Oper. Volt.
Oper. Volt.
10,000
10,000
15,000
10,000
15,000
20,000
25,000
30,000
Type MG Precision High Voltage Resistors
10,000
10,000
15,000
10,000
15,000
20,000
25,000
30,000
Type MG Precision High Voltage Resistors
(38.10 ± 3.18)
Type MG Precision High Voltage Resistors
Type MG Precision High Voltage Resistors
Type USF Ultra-Stable Low TC Film Resistors
1,000
2,000
4,000
1,000
1,000
2,000
4,000
2,000
6,000
4,000
6,000
4,000
1.500 ± .125
6,000
Max.
Max.
1,000
2,000
4,000
1,000
1,000
2,000
4,000
2,000
6,000
4,000
6,000
4,000
6,000
USF370 - 990K - 0.10% - 5 ppm/C
USF240 - 10 Meg - 0.01% - 2 ppm/C
Max.
1,000
2,000
4,000
Max.
Zero Nominal TC
1.80 K
2.00 K
4.00 K
5.00 K
600
600
2.00 K
2.50 K
5.00 K
9.00 K
600
600

600
600
RATED POWER OR
RATED VOLTAGE, %
4.00 Meg
5.00 Meg
R 0.01% maximum.
Zero Nominal TC
Type MG Precision High Voltage Resistors
Resistor Value
Resistor Value
100
Overload

Overload
80
60
40
20
Overload
Overload
Rating
Type 1
Type 1
Type 1
Type 1
Type 1
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 1
Type 1
Type 1
Type 1
Type 1
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Rating
0
Type 2
R (+0.015 0.015)% max.
Rating
Type 1
Type 1
Type 1
Type 1
Type 1
A
10.0 K
20.0 K
25.0 K
50.0 K
10.0 K
18.0 K
20.0 K
40.0 K
Wattage
@
5.00 Meg
9.90 Meg
9.99 Meg
+85C
.33
.75
.75
.33
.75
.75
Wattage
@
25

®
®
AMBIENT TEMPERATURE, °C
®
®
+85C
.33
.75
.75
0.01%, Resistance Range 50 Ohm to 20 Megohm, Voltage Ratings up to 2500 Volts
.33
.75
.75

100
resistance films are the source of
80
60
40
20
Strength
resistance films are the source of
Strength
Dielect.
resistance films are the source of
resistance films are the source of
0
0.01%, Resistance Range 50 Ohm to 20 Megohm, Voltage Ratings up to 2500 Volts
Dielect.
75
Strength
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
Dielect.
A
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
Dielect.
90.0 K
99.0 K
100 K
200 K
50.0 K
90.0 K
99.0 K
100 K
750
750
750
750
750
750
750
750
750
750
750
750
750
750
750
750
750
750
750
750
750
750
750
750
750
750
750
750
750
750
750
25
RHOPOINT COMPONENTS LTD
10.0 Meg
RHOPOINT COMPONENTS LTD.
AMBIENT TEMPERATURE, °C
CAD
CAD
125
B
RHOPOINT COMPONENTS LTD
RHOPOINT COMPONENTS LTD
Oper. Voltage
75
200 �
200 �
400 �
600 �
800 �
800 �
200 �
400 �
600 �
600 �
200 �
500 �
200 �
750 �
300 �
400 �
600 �
800 �
200 �
200 �
400 �
600 �
800 �
800 �
200 �
400 �
600 �
600 �
1.5 K
200 �
500 �
200 �
750 �
300 �
Tolerance
400 �
(0.01% or 0.10%)
600 �
800 �
Continuous
1.5 K
Min.
For Caddock Distributors listed by country see caddock.com/contact/dist.html
Min.
200 �
200 �
400 �
For Caddock Distributors listed by country see caddock.com/contact/dist.html
600 �
800 �
1 K
1 K
1 K
1 K
1 K
Maximum
1 K
1 K
1 K
180 K
198 K
200 K
400 K
Min.
250 K
500 K
1.00 Meg
2.00 Meg
175
— Maximum Absolute TC to 2ppm/
Oper. Voltage
200 Series and 300 Series
200 Series and 300 Series
Continuous
RHOPOINT COMPONENTS LTD.
1,400
Tolerance
(0.01% or 0.10%)
2,500
1,400
2,500
C
Maximum
300
300
Voltage
125
B
— Maximum Absolute TC to 2ppm/
200 Series and 300 Series
1,400
2,500
1,400
2,500
178 Meg
288 Meg
128 Meg
192 Meg
320 Meg
400 Meg
384 Meg
300
178 Meg
300
288 Meg
128 Meg
192 Meg
320 Meg
400 Meg
384 Meg
6.5 Meg
6.5 Meg
225
40 Meg
64 Meg
26 Meg
70 Meg
17 Meg
51 Meg
77 Meg
26 Meg
70 Meg
17 Meg
51 Meg
77 Meg
40 Meg
64 Meg
Min.
N/A
N/A
Min.
N/A
N/A
N/A
N/A
N/A
N/A
-15
N/A
N/A
500 K
990 K
999 K
1.00 Meg
N/A
N/A
N/A
N/A
N/A
N/A
-15
175
Min.
N/A
N/A
N/A
N/A
N/A
-15
C
Resistance
e-mail: [e-mail] • web: www.caddock.com
Resistance
DOC
e-mail: [e-mail] • web: www.caddock.com
2.50 Meg
5.00 Meg
9.90 Meg
9.99 Meg
DOC
Resistance
275
Resistance
225
1,000 Meg
1,250 Meg
2,000 Meg
1,000 Meg
1,250 Meg
2,000 Meg
Standard
Standard
150 Meg
100 Meg
200 Meg
250 Meg
150 Meg
300 Meg
300 Meg
500 Meg
500 Meg
750 Meg
Standard
150 Meg
100 Meg
200 Meg
250 Meg
150 Meg
300 Meg
300 Meg
500 Meg
500 Meg
750 Meg
Max.
10 Meg
20 Meg
50 Meg
20 Meg
20 Meg
50 Meg
75 Meg
75 Meg
Max.
10 Meg
20 Meg
50 Meg
20 Meg
20 Meg
50 Meg
75 Meg
75 Meg
19.8 Meg
9.9 Meg
Max.
5 Meg
8 Meg
275
10 Meg
20 Meg
50 Meg
2.00 Meg
4.00 Meg
5.00 Meg
9.90 Meg
5 Meg
8 Meg
990 K
990 K
50 
50 
5 Meg
8 Meg
Min.
19.8 Meg
9.9 Meg
10.0 Meg
990 K
990 K
50 
50 
Min.
Ordering Information
Design Assistance in Developing High Voltage Resistor Sets with
Low TC Tracking.
high voltage resistor sets, call or write our Applications Engineering and we will
be pleased to offer the best solution from our high voltage resistor product
capabilities.
Resistance
Extended
Extended
10,000 M
10,000 M
Resistance
1,000 M
1,500 M
1,500 M
2,500 M
3,750 M
5,000 M
6,250 M
1,000 M
1,500 M
1,500 M
2,500 M
3,750 M
5,000 M
6,250 M
Extended
225 M
300 M
750 M
750 M
225 M
300 M
750 M
750 M
Max.
For immediate engineering assistance in developing Low Ratio TC matched
Max.
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Ordering Information
Design Assistance in Developing High Voltage Resistor Sets with
Low TC Tracking.
high voltage resistor sets, call or write our Applications Engineering and we will
be pleased to offer the best solution from our high voltage resistor product
capabilities.
Max.
9.99 Meg
10.0 Meg
19.8 Meg
19.98 Meg
20.0 Meg
K
N/A
K
N/A
N/A
N/A
N/A
High
10 Meg
For immediate engineering assistance in developing Low Ratio TC matched
10 Meg
20 Meg
10 Meg
20 Meg
5 Meg
Max.
Dimensions in inches and (millimeters)
(101.60 �3.05)
(127.00 �3.05)
(152.40 �3.05)
10 Meg
10 Meg
20 Meg
10 Meg
20 Meg
(101.60 �3.05)
(127.00 �3.05)
(152.40 �3.05)
Dimensions in inches and (millimeters)
5 Meg
(25.40 �1.02)
(10.16 �.152)
(14.27 �1.52)
(19.05 �1.52)
(25.40 �1.52)
(18.03 �1.27)
(38.10 �2.03)
(25.40 �1.27)
(50.80 �2.03)
(38.10 �2.03)
(25.40 �1.52)
(50.80 �2.03)
(38.10 �1.52)
(76.20 �2.54)
(53.98 �1.52)
(79.38 �1.52)
Dimensions in inches and (millimeters)
(25.40 �1.02)
(10.16 �.152)
(14.27 �1.52)
(19.05 �1.52)
(25.40 �1.52)
(18.03 �1.27)
(38.10 �2.03)
(25.40 �1.27)
(50.80 �2.03)
(38.10 �2.03)
(25.40 �1.52)
(50.80 �2.03)
(38.10 �1.52)
(76.20 �2.54)
(53.98 �1.52)
(79.38 �1.52)
Dimensions in inches and (millimeters)
(12.70 �.76)
(19.05 �.76)
1.000 �.040
1.000 �.060
1.500 �.080
1.000 �.050
2.000 �.080
1.500 �.080
1.000 �.060
Max.
2.000 �.080
1.500 �.060
3.000 �.100
2.125 �.060
3.125 �.060
4.000 �.120
5.000 �.120
6.000 �.120
(12.70 �.76)
(19.05 �.76)
1.000 �.040
1.000 �.060
1.500 �.080
1.000 �.050
2.000 �.080
1.500 �.080
1.000 �.060
2.000 �.080
1.500 �.060
3.000 �.100
2.125 �.060
3.125 �.060
4.000 �.120
5.000 �.120
6.000 �.120
(25.40 �1.02)
(7.95 �.51)
(7.95 �.76)
.710 �.050
.400 �.060
.562 �.060
.750 �.060
.710 �.050
(7.95 �.51)
(7.95 �.76)
.400 �.060
.562 �.060
.750 �.060
(12.70 �.76)
(19.05 �.76)
1.000 �.040
.313 �.020
.313 �.030
.500 �.030
.750 �.030
.313 �.020
.313 �.030
.500 �.030
.750 �.030
(7.95 �.51)
(7.95 �.76)
.313 �.020
.313 �.030
.500 �.030
.750 �.030
A
A
A
Tel: [phone]
Model Number:
Temperature
USF 200 Series Circuit Board Connection Note:
Series Resistor must have the two “bonded” resistors in the package connected
in parallel on the circuit board as shown. This parallel connection of the two
resistors achieves the specified resistance with the specified performance.
Preconditioning for Power and Voltage Ratings
are for continuous duty.
stress voltage levels applied during the manufacturing
process to provide for stable resistor performance even
under momentary overload conditions.
listed in the table may be specified by adding "-15" to the
model number (Example: MG750-15).
and overvoltage ratings do not apply to the "-15" resistors.
Resistance ranges for "-15" resistors shown in the table are
from "-15 Min." to "Standard Max."
Non-Inductive Performance
Non-Inductive Design which uses a serpentine resistive
pattern that provides for neighboring lines to carry current in
opposite directions, thereby achieving maximum cancellation
of flux fields over the entire length of the resistor.
efficient non-inductive construction is accomplished without
derating of any performance advantages.
Coefficient
Preconditioning for Power and Voltage Ratings
are for continuous duty.
stress voltage levels applied during the manufacturing
process to provide for stable resistor performance even
under momentary overload conditions.
listed in the table may be specified by adding "-15" to the
model number (Example: MG750-15).
and overvoltage ratings do not apply to the "-15" resistors.
Resistance ranges for "-15" resistors shown in the table are
from "-15 Min." to "Standard Max."
Non-Inductive Performance
Non-Inductive Design which uses a serpentine resistive
pattern that provides for neighboring lines to carry current in
opposite directions, thereby achieving maximum cancellation
of flux fields over the entire length of the resistor.
efficient non-inductive construction is accomplished without
derating of any performance advantages.
2 ppm/C
2 ppm/C
2 ppm/C
5 ppm/C
Preconditioning for Power and Voltage Ratings
5 ppm/C
are for continuous duty.
5 ppm/C
stress voltage levels applied during the manufacturing
process to provide for stable resistor performance even
under momentary overload conditions.
listed in the table may be specified by adding "-15" to the
model number (Example: MG750-15).
and overvoltage ratings do not apply to the "-15" resistors.
Resistance ranges for "-15" resistors shown in the table are
from "-15 Min." to "Standard Max."
Non-Inductive Performance
Non-Inductive Design which uses a serpentine resistive
pattern that provides for neighboring lines to carry current in
opposite directions, thereby achieving maximum cancellation
of flux fields over the entire length of the resistor.
efficient non-inductive construction is accomplished without
derating of any performance advantages.
Preconditioning for Power and Voltage Ratings
are for continuous duty.
stress voltage levels applied during the manufacturing
process to provide for stable resistor performance even
under momentary overload conditions.
listed in the table may be specified by adding "-15" to the
model number (Example: MG750-15).
and overvoltage ratings do not apply to the "-15" resistors.
Resistance ranges for "-15" resistors shown in the table are
from "-15 Min." to "Standard Max."
Non-Inductive Performance
Non-Inductive Design which uses a serpentine resistive
pattern that provides for neighboring lines to carry current in
opposite directions, thereby achieving maximum cancellation
of flux fields over the entire length of the resistor.
efficient non-inductive construction is accomplished without
derating of any performance advantages.
Other Low TC Resistor Products from Caddock:
• Type TF Low TC Ultra-Precision Film Resistors (1K to 125Meg)
• Type TN Lab Grade Low TC Precision Film Resistors
• Type TK Low TC Precision Radial-Lead Film Resistors
• Type TG Low TC Precision High Voltage Resistors (up to 30KV)
• T912 and T914 Low TC Ultra-Precision Resistor Networks
• Type USVD Ultra-Stable Voltage Dividers (up to 2500 volts)
• Type THV Precision High Voltage Dividers (up to 20KV)
Circuit Board Trace
Custom USF 200 Series and 300 Series Resistors:
USF 200 Series and 300 Series Resistors are available, for high
quantity applications, with custom performance:
• In the 200 Series, Absolute TC to as tight as 1ppm/C is available
Temperature
• Matched Ratio TC to as tight as 0.5ppm/C for equal resistances.
• Matched Ratio TC can be provided in the 200 Series style “bonded”
Model Number:
Coefficient
(8.89 �1.02)
(2.39 �.38)
(2.77 �.64)
(2.39 �.38)
(2.39 �.38)
(2.39 �.38)
(3.56 �.76)
(3.81 �.76)
(3.56 �.76)
(3.56 �.76)
(6.10 �.76)
(3.56 �.76)
(6.10 �.76)
(3.56 �.76)
(6.10 �.76)
(8.00 �.76)
(6.10 �.76)
(8.00 �.76)
(6.10 �.76)
(8.00 �.76)
(8.00 �.76)
(8.00 �.76)
(8.00 �.76)
(8.89 �1.02)
(2.39 �.38)
(2.77 �.64)
(2.39 �.38)
(2.39 �.38)
(2.39 �.38)
(3.56 �.76)
(3.81 �.76)
(3.56 �.76)
(3.56 �.76)
(6.10 �.76)
(3.56 �.76)
(6.10 �.76)
(3.56 �.76)
(6.10 �.76)
(8.00 �.76)
(6.10 �.76)
(8.00 �.76)
(6.10 �.76)
(8.00 �.76)
(8.00 �.76)
(8.00 �.76)
(8.00 �.76)
Front View
2 ppm/C
2 ppm/C
2 ppm/C
5 ppm/C
5 ppm/C
5 ppm/C
.350 �.040
Precision
.094 �.015
.109 �.025
.094 �.015
.094 �.015
.094 �.015
.140 �.030
.150 �.030
.140 �.030
.140 �.030
.240 �.030
.140 �.030
.240 �.030
.140 �.030
.240 �.030
.315 �.030
.240 �.030
.315 �.030
.240 �.030
.315 �.030
.315 �.030
.315 �.030
.315 �.030
.350 �.040
.094 �.015
.109 �.025
.094 �.015
.094 �.015
.094 �.015
.140 �.030
.150 �.030
.140 �.030
.140 �.030
.240 �.030
.140 �.030
.240 �.030
.140 �.030
.240 �.030
.315 �.030
.240 �.030
.315 �.030
.240 �.030
.315 �.030
.315 �.030
.315 �.030
.315 �.030
for certain resistances.
Resistor pairs.
Resistor Value:
(2.39 �.38)
(2.39 �.38)
(2.77 �.64)
(2.39 �.38)
(2.39 �.38)
All power ratings and maximum operating voltage ratings
Maximum operating voltages 60% higher than the values
Most models are manufactured with Caddock's
All power ratings and maximum operating voltage ratings
Maximum operating voltages 60% higher than the values
Most models are manufactured with Caddock's
.094 �.015
.109 �.025
.094 �.015
.094 �.015
.094 �.015
Front View
Top View
All power ratings and maximum operating voltage ratings
Maximum operating voltages 60% higher than the values
Most models are manufactured with Caddock's
(.81 DIA.)
All power ratings and maximum operating voltage ratings
Maximum operating voltages 60% higher than the values
Most models are manufactured with Caddock's
.032 DIA.
(.81 DIA.)
.032 DIA.
B
B
Resistor Value:
B
Type USF 300 Series Ultra-Stable Resistors
Type USF 200 Series Ultra-Stable Resistors
•
•
• ZERO Nominal TC — Max. Absolute TC: 5 ppm/C,
Caddock's Non-inductive Serpentine Pattern
:
Type USF 300 Series Ultra-Stable Resistors

Type USF 200 Series Ultra-Stable Resistors
•
•
• ZERO Nominal TC — Max. Absolute TC: 5 ppm/C,
C, -40
-40C to +85C, referenced to +25C
Fig.
Constructed with two selected USF 300 Series
Resistors bonded back to back to achieve
outstanding low Absolute Temperature Coefficient
performance. The resistors are to be connected in
parallel on the circuit board.
ZERO Nominal TC — Max. Absolute TC: 2 ppm/C,
-40C to +85C, referenced to +25C
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)
(1.02 �.05)

.025 �.002
.025 �.002
.025 �.002
.025 �.002
.025 �.002
.025 �.002
.032 �.002
.025 �.002
.025 �.002
.040 �.002
.025 �.002
.040 �.002
.025 �.002
.040 �.002
.040 �.002
.040 �.002
.040 �.002
.040 �.002
.040 �.002
.040 �.002
.040 �.002
.040 �.002
.040 �.002
Caddock's Non-inductive Serpentine Pattern
.025 �.002
.025 �.002
.025 �.002
.025 �.002
.025 �.002
.025 �.002
.032 �.002
.025 �.002
.025 �.002
.040 �.002
.025 �.002
.040 �.002
.025 �.002
1
.040 �.002
1
.040 �.002
1
.040 �.002
2
.040 �.002
2
:
.040 �.002
2
.040 �.002
.040 �.002
.040 �.002
.040 �.002
.040 �.002
(.64 �.05)
(.64 �.05)
(.64 �.05)
(.64 �.05)
(.64 �.05)
(.64 �.05)
(.81 �.05)
(.64 �.05)
(.64 �.05)
(.64 �.05)
(.64 �.05)
(.64 �.05)
(.64 �.05)
(.64 �.05)
(.64 �.05)
(.64 �.05)
(.64 �.05)
(.81 �.05)
(.64 �.05)
(.64 �.05)
(.64 �.05)
(.64 �.05)
C, -40
N
-40C to +85C, referenced to +25C
Fig.
.025 �.002
.025 �.002
.025 �.002
.025 �.002
.025 �.002
Constructed with two selected USF 300 Series
Resistors bonded back to back to achieve
outstanding low Absolute Temperature Coefficient
performance. The resistors are to be connected in
parallel on the circuit board.
ZERO Nominal TC — Max. Absolute TC: 2 ppm/C,
-40C to +85C, referenced to +25C
(.64 �.05)
(.64 �.05)
(.64 �.05)
(.64 �.05)
(.64 �.05)
1
1
1
2
2
2
C
C
C
N
(19.05 .51)
(38.10 .51)
(19.05 .51)
(38.10 .51)
Most models are available with
(38.10 .51)
(38.10 .51)
1.500 .020
1.500 .020
1.500 .020
1.500 .020
.750 .020
.750 .020

(19.05 .51)
(38.10 .51)
(19.05 .51)
(38.10 .51)
(38.10 .51)
(38.10 .51)
1.500 .020
1.500 .020
Most models are available with
1.500 .020
1.500 .020
C to +85
CADDOCK
.750 .020
.750 .020
CADDOCK
A

USF240
Non-inductive performance
with Caddock's exclusive design
USF340
0232
C to +85
0232
A
A
USF 200 Series
Specifications:
Resistance Tolerance:
USF 300 Series
Temperature Coefficient:
Insulation Resistance: 10,000 Megohms, min.
Overload/Overvoltage: 5 times rated power
with applied voltage not to exceed 1.5 times max-
imum continuous operating voltage for 5 seconds.
Type 1: DC Voltage
Type 2: DC Voltage or V
Thermal Shock:
Cond. C, ΔR 0.25% max.
Moisture Resistance: Mil-Std-202, Method 106,
ΔR 0.4% max.
Load Life:
voltage, not to exceed rated power.
Solderable Leads
Encapsulation: High Temperature Silicone Conformal.
Temperature Coefficient:
A
Thermal Shock:
Cond. C, ΔR 0.25% max.
Moisture Resistance: Mil-Std-202, Method 106,
ΔR 0.4% max.
Load Life:
voltage, not to exceed rated power.
Solderable Leads
Encapsulation: High Temperature Silicone Conformal.
Specifications:
Resistance Tolerance:
Insulation Resistance: 10,000 Megohms, min.
Overload/Overvoltage: 5 times rated power
with applied voltage not to exceed 1.5 times max-
imum continuous operating voltage for 5 seconds.
Type 1: DC Voltage
St'd with "-15" rating
Type 2: DC Voltage or V
St'd with "-15" rating
Resistance Range
St'd with "-15" rating
St'd with "-15"
Resistance Range
St'd with "-15" rating
Non-inductive performance
with Caddock's exclusive design
St'd with "-15" rating
Standard and
Specifications:
St'd with "-15" rating
Standard and
St'd with "-15"
Resistance Range
Resistance Range
Resistance Range
Temperature Coefficient:
Resistance Range
MG750 -100M - 1%
Specifications:
Resistance Tolerance:
Resistance
Resistance
Extended Range
Extended Range
Extended Range
Extended Range
St'd with "-15" rating
Extended Range
Extended Range
Extended
Resistance Range
Extended
Resistance
Website http://www.rhopointcomponents.com
Range
MG750 -100M - 1%
Range
Range
Extended Range
Range
rating
rating
Range
Standard
Standard
Standard
Website http://www.rhopointcomponents.com
Standard
Standard
Standard
(12.70 .51)
(12.70 .51)
(12.70 .51)
(12.70 .51)
(12.70 .51)
Website http://www.rhopointcomponents.com
Fig. 1
Fig. 2
(12.70 3.18)
(12.70 3.18)
(9.53 .51)
(9.53 .51)
(9.53 .51)
Standard
.500 .020
.500 .020
Email: [e-mail]
.500 .020
.500 .020
.375 .020
.375 .020
.375 .020
.500 .020
Dimensions inches (mm)
These ratings are based on pre-
These ratings are based on pre-

.50 .125
(12.70 .51)
(12.70 .51)
D
.50 .125
(12.70 .51)
(12.70 .51)
(12.70 .51)
D
MG
These ratings are based on pre-
(9.53 .51)
(9.53 .51)
(9.53 .51)
C ref. to +25
e-mail: [e-mail]
These ratings are based on pre-
.500 .020
.500 .020
Email: [e-mail]
.375 .020
.500 .020
.375 .020
.375 .020
.500 .020
.500 .020
Dimensions inches (mm)
B
web: www.rhopointcomponents.com
Email

Email: [e-mail]
e-mail: [e-mail]
C ref. to +25
web: www.rhopointcomponents.com
B
B
Web
B
Hurst Green
1,000 hours at +125°C at rated
1,000 hours at +125°C at rated
•
�80 ppm/�C from -15�C to +105�C,
referenced to +25�C.
�80 ppm/�C from +25�C to +105�C,
-200 ppm/�C to +50 ppm/�C from
-15�C to +25�C.
�80 ppm/�C from -15�C to +105�C,
referenced to +25�C.
�80 ppm/�C from +25�C to +105�C,
-200 ppm/�C to +50 ppm/�C from
-15�C to +25�C.
Riverside, California 92507-2364
Riverside, California 92507-2364
•
[e-mail]
(13.97 Max.)
(13.21 Max.)
(10.03 Max.)
(13.97 Max.)
(13.21 Max.)
(10.8 Max.)
(10.8 Max.)
.550 Max.
www.rhopointcomponents.com
.395 Max.
.425 Max.
.425 Max.
.520 Max.
.550 Max.
.520 Max.
Type
(13.97 Max.)
(13.21 Max.)
TEL: [phone]
FAX: [phone]
Mil-Std-202, Method 107,
(10.03 Max.)
(13.97 Max.)
Mil-Std-202, Method 107,
(13.21 Max.)
Sales and Corporate Office
(10.8 Max.)
(10.8 Max.)
�1%, �0.5%, �0.25%, �0.1%
.550 Max.
Sales and Corporate Office
�1%, �0.5%, �0.25%, �0.1%
.395 Max.
.425 Max.
.425 Max.
.520 Max.
.550 Max.
Overload/Overvoltage, �R
C
Overload/Overvoltage, �R
.520 Max.
rms
TEL: [phone]
FAX: [phone]
rms
�1%, �0.5%, �0.25%, �0.1%
TC Specifications
TC Specifications
C
FAX: [phone]
TEL: [phone]
•
Note that overload
Note that overload
TC Specifications

AC
Fax: [phone]
Dimensions in inches
and (millimeters)
AC
Tolerance
Note that overload
Dimensions in inches
and (millimeters)
Fax: [phone]
Tel: [phone]
Tolerance
Phone: [phone]
C
Note that overload
Tel: [phone]
Surrey
Phone: [phone]
(seated height)
The Type USF 200
Load Life, �R

Load Life, �R
1717 Chicago Avenue
Side View
1717 Chicago Avenue
(seated height)
0.5% max.
0.8% max.
Side View
0.5% max.
0.8% max.
Circuit Board Trace
0.5% max.
0.8% max.
0.8% max.
C
0.5% max.
0.8% max.
0.8% max.
Tolerance
Page 1 of 2
Tolerance
Fax: [phone]
Fax: [phone]
(5.08 .51)
(3.81 .51)
.200 .020
(34.29 .51)
(34.29 .51)
.150 .020
(15.24 .51)
(15.24 .51)
1.350 .020
(34.29 .51)
1.350 .020
(34.29 .51)
Tolerance
1.350 .020
1.350 .020
N/A
�1%
.075 .020
(1.91 .51)
�1%
N/A
Page 1 of 2
�1%
�1%
.600 .020
.600 .020
C
(34.29 .51)
(34.29 .51)
(15.24 .51)
1.350 .020
(15.24 .51)
1.350 .020
(34.29 .51)
(34.29 .51)
�1%
�1%
C
1.350 .020
1.350 .020
•
.600 .020
.600 .020
L-359.0103
D
Page 2 of 2
RH8 9AX
L-359.0103
D
Page 2 of 2
Page 2 of 2
28_IL110.1004
28_IL110.1004
L-359.0103
Page 1 of 2
Page 1 of 2
IL-110.019
Page 1 of 2
IL-110.019
Page 1 of 2
This
This
This
•
This
UK