Square D · Electronic Components
QOB150
MINIATURE CIRCUIT BREAKER 120/240V 50A
Part NumberQOB150
ManufacturerSquare D
AvailabilityAvailable to order — request a quote
Specifications
NSN5925-00-324-0100 (NSN)
Federal Item NameCIRCUIT BREAKER
MaterialPLASTIC CASE
Terminals1 CLIP AND 1 SCREW
Body StyleSINGLE POLE TYPE
Reset MethodMANUAL
Body Height2.312 INCHES NOMINAL
Maximum Interrupting Capacity Curr500.0 AC SINGLE LOCATION
Ultimate Trip Rating Of Continuous150.0 SINGLE LOCATION
Trip Release MethodTHERMAL-MAGNETIC SINGLE LOCATION
Operating Voltage Type And Rating120.0 AC SINGLE LOCATION
Circuit Protection TypeOVERCURRENT SINGLE LOCATION
Federal Supply Class5925 — Circuit Breakers
Maximum Continuous Load Current Ra50.0 AMPERES AC SINGLE LOCATION
Trip Release CharacteristicTIME DELAY SINGLE LOCATION
Main Contact Tripping Mechanism TyTRIP FREE
Cancelled NSN5925-00-552-5093 (cancelled)
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 QOB150 available?
We can source QOB150 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 QOB150 by Square D obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If QOB150 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 QOB150?
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 QOB150?
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.