Square D · Electronic Components
QOB350
MINIATURE CIRCUIT BREAKER 240V 50A
Part NumberQOB350
ManufacturerSquare D
AvailabilityAvailable to order — request a quote
Specifications
NSN5925-00-964-3095 (NSN)
Federal Item NameCIRCUIT BREAKER
MaterialPLASTIC CASE
Terminals3 CLIP AND 3 COMPRESSION
Body StyleMULTIPOLE-SINGLE ACTUATOR TYPE
Operating Voltage Type And Rating240.0 AC ALL LOCATIONS
Trip Release Ambient Temp Rating25.0 CELSIUS NOMINAL ALL LOCATIONS
Inclosure Protection Type For WhicFUNGUS RESISTANT
Trip Delay Time In Seconds Per Rat15.000 MINIMUM AT 200 PCT AND 30.000 MAXIMUM AT 200 PCT ALL LOCATIONS
Circuit Protection TypeOVERCURRENT ALL LOCATIONS
Maximum Continuous Load Current Ra50.0 AMPERES AC ALL LOCATIONS
Ultimate Trip Rating Of Continuous125.0 ALL LOCATIONS
Federal Supply Class5925 — Circuit Breakers
Trip Release MethodTHERMAL-MAGNETIC ALL LOCATIONS
Frequency In Hertz60.0 ALL LOCATIONS
Main Contact Tripping Mechanism TyTRIP FREE
Cancelled NSN5925-00-534-6586 (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 QOB350 available?
We can source QOB350 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 QOB350 by Square D obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If QOB350 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 QOB350?
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 QOB350?
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.