Westinghouse Electric Corp. · Electronic Components
S1720778
Circuit Breaker
Part NumberS1720778
ManufacturerWestinghouse Electric Corp.
AvailabilityAvailable to order — request a quote
Specifications
NSN5925-00-257-9536 (NSN)
Federal Item NameCIRCUIT BREAKER
Federal Supply Class5925 — Circuit Breakers
Ultimate Trip Rating Of Continuous125.0 ALL LOCATIONS
Main Contact Tripping Mechanism TyTRIP FREE
Reset MethodMANUAL
Trip Release MethodTHERMAL-MAGNETIC ALL LOCATIONS
Mounting Surface To Terminal End D3.375 INCHES NOMINAL
Distance Between Centerlines Of Mo4.500 INCHES NOMINAL
Mounting Facility Type And Quantit2 UNTHREADED HOLE(S)
Fragility FactorMODERATELY RUGGED
Pole Quantity2
Center To Center Distance Between1.375 INCHES NOMINAL
Unthreaded Mounting Hole Diameter0.188 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 S1720778 available?
We can source S1720778 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 S1720778 by Westinghouse Electric Corp. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If S1720778 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 S1720778?
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 S1720778?
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.