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RTO50 Datasheet(PDF) 2 Page - Vishay Siliconix

Part No. RTO50
Description  Power Resistor, Thick Film Technology
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Maker  VISHAY [Vishay Siliconix]
Homepage  http://www.vishay.com
Logo VISHAY - Vishay Siliconix

RTO50 Datasheet(HTML) 2 Page - Vishay Siliconix

  RTO50 Datasheet HTML 1Page - Vishay Siliconix RTO50 Datasheet HTML 2Page - Vishay Siliconix RTO50 Datasheet HTML 3Page - Vishay Siliconix RTO50 Datasheet HTML 4Page - Vishay Siliconix  
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Document Number: 50035
Revision 14-Jan-05
www.vishay.com
18
RTO 50
Vishay Sfernice
For technical questions, contact sfer@vishay.com
PERFORMANCE
TESTS
CONDITIONS
TYPICAL DRIFTS
NF EN 140000
Momentary Overload
2Pr/5s
± (0.25% + 0.05Ω)
Us < 1.5UL
NF EN 140000
Rapid Temperature Change
CEI 68214 Tests Na
± (0.5% + 0.05Ω)
5 cycles - 55°C to + 155°C
Load Life
NF EN 140000 Pr at + 25°C CEI 115_1
± (1% + 0.05Ω)
Humidity (Steady State)
MIL STD 202
± (0.5% + 0.05Ω)
Method 103 B Cond. D
Vibration
MIL STD 202
± (0.2% + 0.05Ω)
Method 204 Cond. D
Terminal Strength
MIL STD 202
± (0.2% + 0.05Ω)
Method 211 Cond. A1
Power Resistor Thick Film Technology
Resistance Values
≥ 0.010Ω
≥ 0.015Ω
≥ 0.1Ω
≥ 0.5Ω
Tolerances
± 1% at ± 10%
Standard
± 900ppm/°C
± 700ppm/°C
± 250ppm/°C
± 150ppm/°C
Temperature
Coefficient
SPECIAL FEATURES
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 155°C. The dissipated power is simply calculated by the following ratio:
P =
∆T
[RTH (j-c) + RTH (c-a)]
(1)
P:
expressed in W
T:
difference between maximum working temperature and room temperature.
RTH:
(j-c):
thermal resistance value measured between resistive layer and outer side of the resistor. It is the thermal
resistance of the component: (Special Features Table)
RTH:
(c-a): thermal resistance value measured between outer side of the resistor and room temperature. It is the
thermal resistance of the heatsink itself (type, shape) and the quality of the fastening device.
Example:
RTH: (c-a) for RTO 50 power rating 13 W at ambient temperature + 30°C.
Thermal resistance RTH (j-c): 25°C/W
Considering equation (1) we have:
∆T 155°C - 30°C 125°C
RTH (j-c) + RTH (c-a) =
=
= 9.6°C/W
RTH (c-a) 9.6°C/W - 2.6°C/W 7°C/W
∆T
P
125
13


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