TE Connectivity · Electronic Components
21-028
Relay, Electromagnetic
Part Number21-028
ManufacturerTE Connectivity
AvailabilityAvailable to order — request a quote
Specifications
NSN5945-00-911-9889 (NSN)
Federal Item NameRELAY,ELECTROMAGNETIC
Federal Supply Class5945 — Relays and Solenoids
Mounting Facility Type And Quantit4 THREADED STUD(S) SINGLE MOUNTING FACILITY
Frequency In Hertz400.0 NOMINAL
Mounting Facility PatternRECTANGULAR SINGLE MOUNTING FACILITY
Overall Width2.594 INCHES NOMINAL
Thread DirectionRIGHT-HAND SINGLE MOUNTING FACILITY
Terminal Type And Quantity5 SCREW ALL FUNCTIONS
Thread Class2A SINGLE MOUNTING FACILITY
Main Contact Load Current Rating A2.0 AMPERES AC AND 2.0 AMPERES DC RESISTIVE LOAD
Center To Center Distance Between1.859 INCHES NOMINAL SINGLE MOUNTING FACILITY
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Thread Quantity Per Inch32 SINGLE MOUNTING FACILITY
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 21-028 available?
We can source 21-028 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 21-028 by TE Connectivity obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 21-028 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 21-028?
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 21-028?
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.