Square D · Electronic Components
QOB120HM
MINIATURE CIRCUIT BREAKER 120/240V 20A
Part NumberQOB120HM
ManufacturerSquare D
AvailabilityAvailable to order — request a quote
Specifications
NSN5925-01-365-9943 (NSN)
Federal Item NameCIRCUIT BREAKER
MaterialPLASTIC CASE
Terminals1 CLIP AND 1 COMPRESSION
Overall Length3.000 INCHES NOMINAL
Overall Width2.310 INCHES NOMINAL
Overall Height0.750 INCHES NOMINAL
Body StyleRECTANGULAR DIMENSIONAL ENVELOPE
Reset MethodMANUAL
Ultimate Trip Rating Of Continuous125.0 SINGLE LOCATION
Main Contact Tripping Mechanism TyTRIP FREE
Mounting Facility Type And Quantit1 CLIP AND 1 TERMINAL
Federal Supply Class5925 — Circuit Breakers
Pole Quantity1
Actuator FunctionTRIP-RESET
Manual Actuator Type And Quantity1 TOGGLE
Frequency In Hertz60.0 ALL LOCATIONS
Terminal Type And Quantity1 CLIP AND 1 COMPRESSION
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 QOB120HM available?
We can source QOB120HM 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 QOB120HM by Square D obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If QOB120HM 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 QOB120HM?
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 QOB120HM?
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.