Measurement Specialties, Inc. · Electronic Components
21A3
Resistor, Thermal
Part Number21A3
ManufacturerMeasurement Specialties, Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5905-00-145-3433 (NSN)
Federal Item NameRESISTOR,THERMAL
Federal Supply Class5905 — Resistors
Maximum Operating Temp125.0 CELSIUS
Temp Points For Resistance Reading125.0 CELSIUS FIFTH RESISTANCE-TEMPERATURE POINT
Inclosure TypeHERMETICALLY SEALED
Power Dissipation Constant In Mill1.0
Terminal Type And Quantity2 WIRE LEAD
Zero Power Resistance At Specified14.0 OHMS FOURTH RESISTANCE-TEMPERATURE POINT
Resistance Tolerance At A Specifie-15.0 TO 15.0 ALL RESISTANCE-TEMPERATURE POINTS
Probe Diameter0.100 INCHES MAXIMUM
Zero Power Resistance100.000 OHMS
Zero Power Resistance Tolerance In-20.0 TO 20.0
Terminal Length2.000 INCHES MINIMUM
Vendor Part Numbers129AS245
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 21A3 available?
We can source 21A3 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 21A3 by Measurement Specialties, Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 21A3 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 21A3?
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 21A3?
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.