203A1M700T Ohmite Mfg. Co., 203A1M700T Datasheet

203A1M700T

Manufacturer Part Number

203A1M700T

Description

High Precision Welded Axial And Radial Resistors

Manufacturer

Ohmite Mfg. Co.

Datasheet

1.203A1M700T.pdf (1 pages)

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F E A T U R E S

• High precision

• All welded construction

• Molded thermosetting plastic

• Wide ohmic range combined with

• Excellent long-term stability

• Inherent low temperature coef-

• Extremely low Thermal EMF

• Low voltage coefficient

• Low noise

S P E C I F I C A T I O N S

Minimum Values: 0.1Ω for ±1%

Resistance Tolerance: ±0.005%,

Temperature Coefficient (TCR):

Standard temperature range:

Working temperature range:

Ohmite Mfg. Co.

bobbin

tight tolerance

ficient

and ±0.5%; 10Ω for ±0.1% and

tighter

±0.01%, ± 0.02%, ±0.05%,

±0.1%, ±0.5%, and ±1%,

depending on style and value

±10ppm/°C standard for 10Ω

and above. Higher TC’s on

low ohmic values. TC match

to ±1ppm/°C. High TC’s upto

+6000ppm/°C are available

–10°C to +80°C

–60°C to +145°C

Check product availability at

2 0 3 A 1 M 7 0 0 T

*Not every format

is available in

every wattage

Type

reached at 866-9-OHMITE

O R D E R I N G I N F O R M A T I O N

Our friendly Customer

Format*

A, AL = axial

P = flat radial

PA, PC = round

Service team can be

1600 Golf Rd., Rolling Meadows, IL 60008 • 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com

radial

Resistance

1R000 =

10R00 =

100R0 = 100 Ω

1K000 = 1000 Ω

10K00 = 10 KΩ

100K0 = 100 KΩ

1M700 = 1.7 MΩ

www.ohmite.com

C O N S T R U C T I O N

All Welded Construction: The

combination of all welded con-

struction and compatible materials

provide the most reliable means of

interconnects possible.

Butt Weld of Tab to Terminal:

A tab material of 800 ohm alloy

(the same as the resistance wire)

is butt welded to the terminal and

molded deep into the resistor

bobbin. This design parameter

assures the least possible DC

transients due to thermal EMF.

Bobbin Design: The ratio of the

height of the Pi wall to the width

of the Pi and to the diameter of

the bobbin mandrel are critical to

the basic stability of a wirewound

resistor. These parameters are

optimized for each wire size, watt-

age size and range of resistor

values.

Encapsulation Material: Both the

bobbin and the final encapsulation

material are thermoset-

ting alkyd polyester. The

resulting resistor is vir-

tually a homogeneous

mass with an identical

coefficient of expansion

which is unaffected

by the most violent of

temperature cycling. All

types are unaffected by

application of solvents.

Terminal Materials:

The standard terminal

material is hot solder

dipped copper (C5N).

Other available materi-

als are bare nickel

(N1N) and gold plated

nickel (N2N).

10 Ω

1 Ω

Tolerance

T = 0.01%

Q = 0.02%

A = 0.05%

B = 0.1%

F = 1.0%

Type

*Available in hermetically sealed

123A

118A

122A

102A

102AL

101A

153A

103A

135A

105A

184A

185A*

202A

204A

203A

205A*

207A*

308A

210A*

307A

310A

505A

510A*

515A*

517A

520A*

101P

102P

203PC 1.59 M

203PA

305PA

505PA

1.42 M

1.93 M

4.10 M

5.63 M

7.68 M

1.48 M

Ohms

1.7 M

3.0 M

3.3 M

9.5 M

Max. @125°C

10 M

24 M

35 M

43 M

111k

192k

199k

334k

410k

435k

633k

750k

820k

961k

968k

453k

821k

Axial

Model

101P

102P

203PC 0.150 / 3.81

203PA 0.200 / 5.08

305PA 0.200 / 5.08

505PA 0.300 / 7.62

Round Radial

Power Rating

1.25" / 31.75mm

(Watts)

0.125

0.05

0.10

0.25

0.33

0.50

0.60

0.50

0.60

1.00

1.25

1.50

1.75

2.00

0.25

0.50

1.00

0.150 / 3.81 0.110 / 2.79

0.125 / 3.18 0.125 / 3.18

High Precision Welded Axial and Radial

min.

Dim. C

1200 0.500 / 12.70

Volts

Max.

150

300

150

300

200

400

800

150

0.500 / 12.70 0.500 / 12.70

0.500 / 12.70

0.500 / 12.70 0.500 / 12.70

0.100 / 2.54

0.130 / 3.30

0.123 / 3.12

0.110 / 2.79

0.130 / 3.30

0.150 / 3.81

0.160 / 4.06

0.150 / 3.81

0.187 / 4.75

0.250 / 6.35

0.312 / 7.93

0.250 / 6.35

0.375 / 9.53

0.300 / 7.62

0.250 / 6.35

0.250 / 7.92

0.270 / 6.86

0.375 / 9.53

Dim. D

—

(±.020 in./ ±.508 mm)

Overall Dimensions

HPW Series

0.500 / 12.70

0.750 / 19.05

0.810 / 20.57

0.750 / 19.05

0.500 / 12.70

0.230 / 5.84

0.180 / 4.57

0.218 / 5.54

0.250 / 6.35

0.313 / 7.95

0.375 / 9.53

0.245 / 6.22

0.300 / 7.62

0.310 / 7.87

0.375 / 9.53

0.310 / 7.87

0.375 / 9.53

0.343 / 8.71

1.00 / 25.40

1.50 / 38.10

1.75 / 44.45

0.320 / 8.13

0.250 / 6.35

0.312 / 7.93

0.320 / 8.13

2.00 / 50.8

Flat Radial

AWG Lead Diam.

24* 0.020 / 0.508

22* 0.026 / 0.660

20* 0.032 / 0.813

22* 0.026 / 0.660

0.016 / 0.406

0.020 / 0.508

0.026 / 0.660

0.032 / 0.813

0.026 / 0.660

0.032 / 0.813

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