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36

RW Series

High Power SMD Wirewound Resistors

5 and 7 watt

Fea tu R e S

•Finneddesignfacilitatescooling

•HighPowerDensity

•WideResistanceRange

•TightTolerance

•LowTCR

Pe RF o R mance D ata

RW5S0

RW7S0

Power at 25°C

at 70°C

7 watts

5 watts

10 watts

7 watts

Resistance range

0.1Ω ~ 50K

0.1Ω ~ 100K

Non-inductive range

0.1Ω ~ 12.5K

0.1Ω ~ 20K

Tolerance

0.5%, 1%, 5%

Temperature Coefficient

0.1Ω ~ 0.99Ω: ±90ppm

1Ω ~ 10Ω: ±50ppm

10Ω+: ±20ppm

Operating temp. range

-55°C ~ +155°C

Max. working voltage

Weight

5.67g

11.34g

c ha R acte R i S tic S

Temp. cycle (-55°C to 125°C, 1000 cycles)

±0.5%+.05Ω

Load Life (1000 hours at 25°C)

±1.0%+.05Ω

Immersion (260°C for 10 sec.)

±0.1%+.05Ω

Leaching (260°C Solder immersion, 60 sec.)

No visible leaching

Thermal Shock (Units at -55°C, then rated power applied)

No mechanical damage

Flammability UL Material rating

UL94V0

Derating

100

Ambient Temperature, C

60

20

0

80

40

25

50

100

150

75

70

0

125

Ohmitehasuseditsthermalmanagementexpertise

toproduceauniqueresistordesign.Theresistor

bodyincorporatesfinsidenticaltoaheatsink.These

fins,aswithaheatsink,increasethesurfaceareaof

thepartandallowforgreaterpowerdissipation.This

uniquedesignallowsasmallfootprintfortheSMD

deviceandahighpowerdissipation.These5and7

wattresistorsareextremelystablewithaloadlife

driftofonly1%.Aspecialflathasbeendesignedin

tothepartforpickandplaceoperations.

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