MIL-SPEC · Electronic Components
RBR54LR4020FR
Resistor, Fixed, Wire Wound
Part NumberRBR54LR4020FR
ManufacturerMIL-SPEC
AvailabilityAvailable to order — request a quote
Specifications
NSN5905-00-288-7766 (NSN)
Federal Item NameRESISTOR,FIXED,WIRE WOUND
Federal Supply Class5905 — Resistors
Temp Coefficient Of Resistance In-90.0 TO 90.0
Test Data Document81349-MIL-R-39005 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DA
Terminal TypeWIRE LEAD
Body Diameter0.250 INCHES NOMINAL
Body Length0.750 INCHES NOMINAL
Reliability Failure Rate Level In0.010
Terminal Length1.500 INCHES NOMINAL
Reliability IndicatorESTABLISHED
Ambient Temp At Full Rated Power125.0 CELSIUS
Inclosure TypeENCAPSULATED
Power Dissipation Rating In Watts0.250 FREE AIR
Cancelled NSN5905-00-243-1842 (cancelled)
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 RBR54LR4020FR available?
We can source RBR54LR4020FR 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 RBR54LR4020FR by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If RBR54LR4020FR 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 RBR54LR4020FR?
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 RBR54LR4020FR?
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.