Lockheed Martin · Electronic Components
TN1120
Circuit Breaker
Part NumberTN1120
ManufacturerLockheed Martin
AvailabilityAvailable to order — request a quote
Specifications
NSN5925-00-509-8773 (NSN)
Federal Item NameCIRCUIT BREAKER
Federal Supply Class5925 — Circuit Breakers
Body Height3.594 INCHES NOMINAL
Body Width1.500 INCHES NOMINAL
Maximum Interrupting Capacity Curr5000.0 AC AND 5000.0 DC SINGLE LOCATION
Circuit Protection TypeOVERCURRENT SINGLE LOCATION
Reset MethodMANUAL
Trip Release CharacteristicINSTANTANEOUS AND TIME DELAY SINGLE LOCATION
Ultimate Trip Rating Of Continuous115.0 SINGLE LOCATION
Maximum Continuous Load Current Ra20.0 AMPERES AC AND 20.0 AMPERES DC SINGLE LOCATION
Main Contact Tripping Mechanism TyTRIP FREE
Pole Quantity1
Unthreaded Mounting Hole Diameter0.164 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 TN1120 available?
We can source TN1120 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 TN1120 by Lockheed Martin obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If TN1120 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 TN1120?
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 TN1120?
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.