Vishay · Passive Components > MIL Resistors
RWR81S4R02FS
MIL-PRF-39007 established-reliability wirewound power resistor, 4.02Ω ±1% (RWR81)
Part NumberRWR81S4R02FS
ManufacturerVishay
AvailabilityIn stock — ships fast
Specifications
NSN5905-01-163-3108 (NSN)
Federal Item NameRESISTOR,FIXED,WIRE WOUND,INDUCT
Terminal TypeWIRE LEAD
Ambient Temp At Full Rated Power25.0 CELSIUS
Inclosure TypeENCAPSULATED
Reliability IndicatorESTABLISHED
Power Dissipation Rating In Watts1.000 FREE AIR
Temp Range Of Temp Coefficient In-55.0 TO 275.0
Ambient Temp In Deg Celsius At Zer275.0
Cubic Measure0.002 CUBIC INCHES
Reliability Failure Rate Level In0.001
Body Diameter0.085 INCHES NOMINAL
Federal Supply Class5905 — Resistor
Body Length0.250 INCHES NOMINAL
Terminal Length1.500 INCHES MINIMUM
Cancelled NSN5905-01-259-1965 (cancelled)
ESD/EMICode A — ESD/EMI sensitive item
RH Electronics, Inc. — independent stocking distributor since 1982.
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Frequently asked
Is RWR81S4R02FS in stock?
Yes — RWR81S4R02FS is in our stock database. Request a quote for current pricing and lead time.
Is RWR81S4R02FS by Vishay obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If RWR81S4R02FS has been discontinued, we can often source remaining stock or qualified alternates. Contact us with your quantity and target date.
How does RH Electronics verify parts like RWR81S4R02FS?
Every incoming shipment is inspected under our ISO 9001:2015 quality system — documentation, markings, and construction checked against known-good references. For deeper analysis, we direct work through accredited independent labs. We've been an ERAI member since 1998 and a GIDEP participant.
Can you find a cross-reference or alternate for RWR81S4R02FS?
Yes. Our team reads part numbers the way they were designed — decoding family, speed, temperature grade, package, and reliability level — to identify acceptable alternates when the exact part isn't available. Submit a quote request and we'll advise.