TE Connectivity · Electronic Components
C-21AA
Relay, Electromagnetic
Part NumberC-21AA
ManufacturerTE Connectivity
AvailabilityAvailable to order — request a quote
Specifications
NSN5945-01-493-4161 (NSN)
Federal Item NameRELAY,ELECTROMAGNETIC
Federal Supply Class5945 — Relays and Solenoids
Center To Center Distance Between1.875 INCHES NOMINAL SINGLE MOUNTING FACILITY
Main Contact Maximum Voltage Ratin208.0 AC
Operating Voltage Rating And Type18.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Main Contact Load Current Rating A5.0 AMPERES AC LAMP LOAD
Auxiliary Contact Load Current Rat1.0 AMPERES AC LAMP LOAD
Coil Quantity1
Mounting Facility Type And Quantit4 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
Mounting Facility PatternRECTANGULAR SINGLE MOUNTING FACILITY
Unthreaded Mounting Hole Diameter0.176 INCHES MINIMUM AND 0.182 INCHES MAXIMUM SINGLE MOUNTING FACILITY
Overall Length3.210 INCHES MAXIMUM
Overall Width3.210 INCHES MAXIMUM
ESD/EMICode B — 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 C-21AA available?
We can source C-21AA 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 C-21AA by TE Connectivity obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If C-21AA 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 C-21AA?
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 C-21AA?
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.