Meggitt (New Hampshire), Inc. · Electronic Components
501B2103
Relay, Thermal
Part Number501B2103
ManufacturerMeggitt (New Hampshire), Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5945-00-257-7921 (NSN)
Federal Item NameRELAY,THERMAL
Federal Supply Class5945 — Relays and Solenoids
Contact ArrangementSINGLE POLE, SINGLE THROW, NORMALLY OPEN
Contact Maximum Current Rating In3.0 AC OR 3.0 DC
Heater Power Rating In Watts5.0
Delay Time In Seconds20.0 FIXED OPERATE NOMINAL
Environmental ProtectionHERMETIC
Overall Diameter1.275 INCHES NOMINAL
Contact Maximum Voltage Rating In250.0 AC AND 150.0 DC
Mounting Facility Type And Quantit1 OCTAL BASE PLUG-IN
Terminal Type And Quantity4 PIN
Heater Voltage Rating In Volts117.0
Overall Length3.500 INCHES NOMINAL
Vendor Part Numbers501TYPEB2103
Cancelled NSN5945-00-523-5692 (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 501B2103 available?
We can source 501B2103 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 501B2103 by Meggitt (New Hampshire), Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 501B2103 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 501B2103?
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 501B2103?
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.