Mission Systems Davenport · Electronic Components
ERS21F549R5A
Resistor, Fixed, Wire Wound
Part NumberERS21F549R5A
ManufacturerMission Systems Davenport
AvailabilityAvailable to order — request a quote
Specifications
NSN5905-00-989-1942 (NSN)
Federal Item NameRESISTOR,FIXED,WIRE WOUND
Federal Supply Class5905 — Resistors
Terminal TypeWIRE LEAD
Inclosure TypeENCAPSULATED
Power Dissipation Rating In Watts0.600 FREE AIR
Body Diameter0.188 INCHES NOMINAL
Body Length0.375 INCHES NOMINAL
Ambient Temp At Full Rated Power125.0 CELSIUS
Ambient Temp In Deg Celsius At Zer135.0
Reliability IndicatorNOT ESTABLISHED
Electrical Resistance549.500 OHMS
Resistance Tolerance In Percent-0.100 TO 0.100
Style DesignatorAXIAL TERMINAL EACH END
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 ERS21F549R5A available?
We can source ERS21F549R5A 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 ERS21F549R5A by Mission Systems Davenport obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If ERS21F549R5A 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 ERS21F549R5A?
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 ERS21F549R5A?
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.