Lockheed Martin Services, LLC · Electronic Components
7939979-2
Circuit Breaker
Part Number7939979-2
ManufacturerLockheed Martin Services, LLC
AvailabilityAvailable to order — request a quote
Specifications
NSN5925-01-217-1641 (NSN)
Federal Item NameCIRCUIT BREAKER
Federal Supply Class5925 — Circuit Breakers
Trip Release CharacteristicTIME DELAY ALL LOCATIONS
Reset MethodMANUAL
Ultimate Trip Rating Of Continuous125.0 ALL LOCATIONS
Circuit Protection TypeOVERCURRENT ALL LOCATIONS
Maximum Interrupting Capacity Curr1000.0 AC ALL LOCATIONS
Maximum Continuous Load Current Ra20.0 AMPERES AC ALL LOCATIONS
Operating Voltage Type And Rating250.0 AC ALL LOCATIONS
Center To Center Distance Between1.928 INCHES MINIMUM AND 1.948 INCHES MAXIMUM
Mounting Surface To Terminal End D2.461 INCHES MINIMUM AND 2.481 INCHES MAXIMUM
Fragility FactorMODERATELY RUGGED
Storage TypeGENERAL PURPOSE WAREHOUSE
Vendor Part NumbersUPL-1111-1-66F-203
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 7939979-2 available?
We can source 7939979-2 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 7939979-2 by Lockheed Martin Services, LLC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 7939979-2 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 7939979-2?
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 7939979-2?
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.