LTO030F4R700FTE3 Vishay, LTO030F4R700FTE3 Datasheet - Page 2

• Manufacturer Part Number: LTO030F4R700FTE3
• Description: RESISTOR, 30W 4.7R 1%
• Manufacturer: Vishay
• Series: LTOr

Specifications of LTO030F4R700FTE3

• Resistance: 4.7ohm
• Resistance Tolerance: ± 1%
• Power Rating: 30W
• Voltage Rating: 250V
• Resistor Element Material: Thick Film
• Svhc: No SVHC (15-Dec-2010)
• External: RoHS Compliant
• Temperature Coefficient: ± 150ppm/°C
• Resistor Case Style: Radial
• Rohs Compliant: Yes

Document Number: 50049
Revision 26-Mar-07
choice of the heatsinK
The user must choose according to the working conditions of the component (power, room temperature).
Maximum working temperature must not exceed 150 °C. The dissipated power is simply calculated by the following ratio:
Example:
R
Thermal resistance R
Considering equation (1) we have:
with a thermal grease R
special features
Typical Temperature
Coefficient
(- 55 °C/+ 155 °C)
Resistance Values
Tolerances
performance
TESTS
Momentary Overload
Rapid Temperature Change
Load Life
Humidity (Steady State)
Vibration
Terminal Strength
Shock
TH:
P:
∆T: difference between maximum working temperature and room temperature.
R
R
thermal resistance of the heatsink itself (type, shape), the quality of the fastening device, and the thermal resistance of the
thermal compound.
TH:
TH:
(c-a) for LTO30 power rating 10 W at ambient temperature + 25 °C.
expressed in W
(j-c): thermal resistance value measured between resistive layer and outer side of the resistor. It is the thermal
resistance of the component.
(c-a): thermal resistance value measured between outer side of the resistor and room temperature. It is the
∆T = 150 °C - 25 °C = 125 °C
R
R
TH
TH
(j-c) + R
(c-a) = 12.5 °C/W - 4.2 °C/W = 8.3 °C/W
TH
TH
TH
(j-c): 4.2 °C/W
(c-a) =
(c - h) = 1 °C/W, we need a heat sink with R
30 Watt Power Resistor Thick Film Technology
∆T
P
± 900 ppm/°C
=
≥ 0.010
For technical questions, contact [e-mail]
125
10
IERC 60068-2-14 Tests Na
1000 h Pr at + 25 °C
= 12.5 °C/W
100G, MIL STD 202
- 55 °C to + 155 °C
P =
CONDITIONS
MIL STD 202
MIL STD 202
MIL STD 202
EN 60115-1
Us < 1.5 UL
EN 60115-1
EN 60115-1
1.5 Pr/5 s
5 cycles
[R
TH
(j-c) + R
± 700 ppm/°C
∆T
≥ 0.015
TH
(c-a)]
± 1 % at ± 10 %
TH
(h - a) = 7.3 °C/W
(1)
± 250 ppm/°C
≥ 0.1
Method 103 B Cond. D
Method 211 Cond. A1
Method 204 Cond. D
Method 213 Cond. I
± (0.5 % + 0.005 Ω)
± (0.5 % + 0.005 Ω)
± (0.5 % + 0.005 Ω)
± (0.2 % + 0.005 Ω)
± (0.2 % + 0.005 Ω)
± (0.5 % + 0.005 Ω)
TYPICAL DRIFTS
± (1 % + 0.005 Ω)
Vishay Sfernice
± 150 ppm/°C
www.vishay.com
≥ 0.5
LTO 30
15