Westinghouse Electric Corp. · Electronic Components
1287640
Circuit Breaker
Part Number1287640
ManufacturerWestinghouse Electric Corp.
AvailabilityAvailable to order — request a quote
Specifications
NSN5925-00-396-2412 (NSN)
Federal Item NameCIRCUIT BREAKER
Federal Supply Class5925 — Circuit Breakers
MaterialPLASTIC CASE
Ultimate Trip Rating Of Continuous1400.0 ALL LOCATIONS
Overall Width4.125 INCHES NOMINAL
Reset MethodMANUAL
Main Contact Tripping Mechanism TyTRIP FREE
Maximum Interrupting Capacity Curr15000.0 AC ALL LOCATIONS
Circuit Protection TypeOVERCURRENT ALL LOCATIONS
Distance Between Centerlines Of Mo7.875 INCHES NOMINAL
Unthreaded Mounting Hole Diameter0.260 INCHES NOMINAL AND 0.313 INCHES NOMINAL
Mounting Facility Type And Quantit4 UNTHREADED HOLE(S)
Pole Quantity3
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 1287640 available?
We can source 1287640 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 1287640 by Westinghouse Electric Corp. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 1287640 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 1287640?
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 1287640?
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.