MIL-SPEC · Electronic Components
RBR55LR4990FM
Resistor, Fixed, Wire Wound
Part NumberRBR55LR4990FM
ManufacturerMIL-SPEC
AvailabilityAvailable to order — request a quote
Specifications
NSN5905-00-401-7423 (NSN)
Federal Item NameRESISTOR,FIXED,WIRE WOUND
Federal Supply Class5905 — Resistors
Style DesignatorAXIAL TERMINAL EACH END
Terminal TypeWIRE LEAD
Ambient Temp In Deg Celsius At Zer145.0
Temp Range Of Temp Coefficient In-65.0 TO 145.0
Ambient Temp At Full Rated Power125.0 CELSIUS
Reliability IndicatorESTABLISHED
Inclosure TypeENCAPSULATED
Body Diameter0.250 INCHES NOMINAL
Reliability Failure Rate Level In1.000
Power Dissipation Rating In Watts0.150 FREE AIR
Body Length0.500 INCHES NOMINAL
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 RBR55LR4990FM available?
We can source RBR55LR4990FM 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 RBR55LR4990FM by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If RBR55LR4990FM 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 RBR55LR4990FM?
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 RBR55LR4990FM?
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.