Lockheed Martin Corp. · Electronic Components
7902491-221
Resistor, Fixed, Wire Wound, Induct
Part Number7902491-221
ManufacturerLockheed Martin Corp.
AvailabilityAvailable to order — request a quote
Specifications
NSN5905-00-842-3441 (NSN)
Federal Item NameRESISTOR,FIXED,WIRE WOUND,INDUCT
Federal Supply Class5905 — Resistors
Heat Sink Length7.000 INCHES7.000 INCHES
Resistance Tolerance In Percent-1.000 TO 1.000
MaterialALUMINUM ALLOY HEAT SINK
Body Width0.531 INCHES NOMINAL0.531 INCHES NOMINAL
Heat Sink Height2.000 INCHES2.000 INCHES
Reliability IndicatorNOT ESTABLISHEDNOT ESTABLISHED
Terminal TypeTAB, SOLDER LUGTAB, SOLDER LUG
Heat Sink Thickness0.040 INCHES0.040 INCHES
Mounting Hole Size0.125 INCHES NOMINAL0.125 INCHES NOMINAL
Terminal Length0.438 INCHES NOMINAL0.438 INCHES NOMINAL
Power Dissipation Rating In Watts8.000 FREE AIR8.000 FREE AIR
Vendor Part NumbersRE70G20R0
Cancelled NSN5905-00-961-4058 (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 7902491-221 available?
We can source 7902491-221 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 7902491-221 by Lockheed Martin Corp. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 7902491-221 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 7902491-221?
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 7902491-221?
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.