MIL-SPEC · Electronic Components
RWR78N1242FS
Resistor, Fixed, Wire Wound, Nonind
Part NumberRWR78N1242FS
ManufacturerMIL-SPEC
AvailabilityAvailable to order — request a quote
Specifications
NSN5905-01-053-3910 (NSN)
Federal Item NameRESISTOR,FIXED,WIRE WOUND,NONIND
Federal Supply Class5905 — Resistors
Ambient Temp In Deg Celsius At Zer275.0
Temp Range Of Temp Coefficient In-55.0 TO 275.0
Terminal Length1.500 INCHES MINIMUM
Reliability Failure Rate Level In0.001
Inclosure TypeENCAPSULATED
Power Dissipation Rating In Watts5.000 FREE AIR
Body Length0.875 INCHES NOMINAL
Body Diameter0.312 INCHES NOMINAL
Terminal TypeWIRE LEAD
Ambient Temp At Full Rated Power25.0 CELSIUS
Reliability IndicatorESTABLISHED
ESD/EMICode B — 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 RWR78N1242FS available?
We can source RWR78N1242FS even if it isn't in our active stock list. As an independent distributor we reach inventory outside the franchise channel — including hard-to-find and obsolete parts. Send us a quote request.
Is RWR78N1242FS by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If RWR78N1242FS 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 RWR78N1242FS?
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 RWR78N1242FS?
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.