Lockheed Martin Corp. · Electronic Components
7902491-57
Resistor, Fixed, Wire Wound, Induct
Part Number7902491-57
ManufacturerLockheed Martin Corp.
AvailabilityAvailable to order — request a quote
Specifications
NSN5905-01-010-9497 (NSN)
Federal Item NameRESISTOR,FIXED,WIRE WOUND,INDUCT
Federal Supply Class5905 — Resistors
Test Data Document81349-MIL-R-18546/1 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE
Resistance Tolerance In Percent-1.000 TO 1.000
Terminal Width0.081 INCHES MINIMUM
Temp Range Of Temp Coefficient In-55.0 TO 275.0
Distance Between Centerlines Of Mo0.719 INCHES NOMINAL
Power Dissipation Rating In Watts20.000 HEAT SINK
Mounting Hole Size0.125 INCHES NOMINAL
Body Length1.062 INCHES NOMINAL
Terminal TypeTAB, SOLDER LUG
Ambient Temp At Full Rated Power25.0 CELSIUS
Terminal Length0.438 INCHES NOMINAL
Vendor Part NumbersRE70GR392
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 7902491-57 available?
We can source 7902491-57 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 7902491-57 by Lockheed Martin Corp. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 7902491-57 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 7902491-57?
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 7902491-57?
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.