Smiths Interconnect Inc. · Electronic Components
21A3121
Isolator, Radio Frequency Reflect
Part Number21A3121
ManufacturerSmiths Interconnect Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5985-01-503-2783 (NSN)
Federal Item NameISOLATOR,RADIO FREQUENCY REFLECT
Federal Supply Class5985 — Antennas and Waveguides
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 21A3121 available?
We can source 21A3121 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 21A3121 by Smiths Interconnect Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 21A3121 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 21A3121?
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 21A3121?
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.