Te Connectivity Corporation · Electronic Components
21-042A
Relay, Electromagnetic
Part Number21-042A
ManufacturerTe Connectivity Corporation
AvailabilityAvailable to order — request a quote
Specifications
NSN5945-00-346-3642 (NSN)
Federal Item NameRELAY,ELECTROMAGNETIC
Federal Supply Class5945 — Relays and Solenoids
Coil Quantity2
Environmental ProtectionHUMIDITY RESISTANT
Main Contact Maximum Voltage Ratin28.0 DC
Frequency In Hertz60.0 MINIMUM AND 375.0 MAXIMUM
Operating Voltage Rating And Type115.0 VOLTS AC 25 DEG CELSIUS ALL WINDINGS
Features ProvidedPOLARIZED
Mounting Facility Type And Quantit4 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
Unthreaded Mounting Hole Diameter0.196 INCHES NOMINAL SINGLE MOUNTING FACILITY
Winding Quantity2
Mounting Facility PatternRECTANGULAR SINGLE MOUNTING FACILITY
Duty TypeCONTINUOUS
Cancelled NSN5945-00-034-3894 (cancelled)
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 21-042A available?
We can source 21-042A 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 21-042A by Te Connectivity Corporation obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 21-042A 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 21-042A?
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 21-042A?
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.