Square D · Electronic Components
QO310
MINIATURE CIRCUIT BREAKER 240V 10A
Part NumberQO310
ManufacturerSquare D
AvailabilityAvailable to order — request a quote
Specifications
NSN5925-01-170-0444 (NSN)
Federal Item NameCIRCUIT BREAKER
MaterialPLASTIC CASE
Terminals3 CLIP AND 3 SCREW
Body StyleMULTIPOLE-SINGLE ACTUATOR TYPE
Actuator Position DesignationAT POLE TWO
Center To Center Distance Between0.740 INCHES NOMINAL
Pole Quantity3
Mounting Facility Type And Quantit6 TERMINAL
Boss Height0.250 INCHES NOMINAL
Actuator FunctionTRIP-RESET
Trip Delay Time In Seconds Per Rat120.000 MAXIMUM AT 200 PCT ALL LOCATIONS
Federal Supply Class5925 — Circuit Breakers
Inclosure Protection Type For WhicDUSTPROOF
Internal Trip Release ConfiguratioSERIES TRIP ALL LOCATIONS
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 QO310 available?
We can source QO310 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 QO310 by Square D obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If QO310 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 QO310?
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 QO310?
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.