Northrop Grumman Systems Corporation · Electronic Components
021-000557
Relay, Thermal
Part Number021-000557
ManufacturerNorthrop Grumman Systems Corporation
AvailabilityAvailable to order — request a quote
Specifications
NSN5945-00-823-2227 (NSN)
Federal Item NameRELAY,THERMAL
Federal Supply Class5945 — Relays and Solenoids
Contact Maximum Current Rating In3.0 AC OR 0.125 DC
Mounting Facility Type And Quantit2 UNTHREADED HOLE(S)
Heater Voltage Rating In Volts27.0
Delay Time In Seconds150.0 FIXED OPERATE NOMINAL
Terminal Type And Quantity7 PIN
Overall Diameter0.921 INCHES NOMINAL
Heater Power Rating In Watts4.0
Contact Maximum Voltage Rating In115.0 AC AND 28.0 DC
Contact ArrangementSINGLE POLE, SINGLE THROW, NORMALLY OPEN
Overall Length2.375 INCHES NOMINAL
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 021-000557 available?
We can source 021-000557 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 021-000557 by Northrop Grumman Systems Corporation obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 021-000557 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 021-000557?
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 021-000557?
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.