Lockheed Martin Corp. · Electronic Components
740221-101
Relay, Electromagnetic
Part Number740221-101
ManufacturerLockheed Martin Corp.
AvailabilityAvailable to order — request a quote
Specifications
NSN5945-00-951-5723 (NSN)
Federal Item NameRELAY,ELECTROMAGNETIC
Federal Supply Class5945 — Relays and Solenoids
Center To Center Distance Between0.938 INCHES NOMINAL SINGLE MOUNTING FACILITY
Time Delay1.00 SECONDS MINIMUM AND 10.00 SECONDS MAXIMUM ADJUSTABLE OPERATE TIME
Operating Voltage Rating And Type30.0 VOLTS DC 25 DEG CELSIUS ALL WINDINGS
Environmental ProtectionDUSTPROOF
Thread DirectionRIGHT-HAND SINGLE MOUNTING FACILITY
Nominal Thread Size0.138 INCHES SINGLE MOUNTING FACILITY
Overall Width1.440 INCHES MAXIMUM
Features ProvidedPOLARIZED
Main Contact Maximum Voltage Ratin115.0 AC AND 28.0 DC
Main Contact Load Current Rating A5.0 AMPERES AC AND 5.0 AMPERES DC RESISTIVE LOAD
Mounting Facility PatternTRIANGLE 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 740221-101 available?
We can source 740221-101 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 740221-101 by Lockheed Martin Corp. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 740221-101 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 740221-101?
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 740221-101?
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.