Measurement Specialties, Inc. · Electronic Components
21E1
Resistor, Thermal
Part Number21E1
ManufacturerMeasurement Specialties, Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5905-01-050-4466 (NSN)
Federal Item NameRESISTOR,THERMAL
Federal Supply Class5905 — Resistors
Thermal Time Constant In Seconds75.0
Terminal Type And Quantity2 SURFACE CONTACT
Power Dissipation Constant In Mill10.0
Ambient Temp At Full Rated Power25.0 CELSIUS
Maximum Operating Temp200.0 CELSIUS
Zero Power Resistance Tolerance In-10.0 TO 10.0
Body Outside Diameter0.400 INCHES NOMINAL
Reference Temp In Deg Celsius25.0
Inclosure TypeENCAPSULATED
Reliability IndicatorNOT ESTABLISHED
Zero Power Resistance100.000 OHMS
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 21E1 available?
We can source 21E1 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 21E1 by Measurement Specialties, Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 21E1 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 21E1?
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 21E1?
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.