Square D · Electronic Components
QO120
CIRCUIT BREAKER, THERMAL MAG, 1P, 20A
Part NumberQO120
ManufacturerSquare D
AvailabilityAvailable to order — request a quote
Specifications
NSN5925-00-583-7941 (NSN)
Federal Item NameCIRCUIT BREAKER
MaterialPLASTIC CASE
Terminals1 CLIP AND 1 SCREW
Body StyleSINGLE POLE TYPE
Boss Height0.156 INCHES NOMINAL
Body Width0.734 INCHES NOMINAL
Trip Delay Time In Seconds Per Rat13.000 NOMINAL AT 200 PCT SINGLE LOCATION
Trip Release Ambient Temp Rating25.0 CELSIUS NOMINAL SINGLE LOCATION
Internal Trip Release ConfiguratioSERIES TRIP SINGLE LOCATION
Pole Quantity1
Manual Actuator Type And Quantity1 TOGGLE
Federal Supply Class5925 — Circuit Breakers
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 QO120 available?
We can source QO120 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 QO120 by Square D obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If QO120 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 QO120?
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 QO120?
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.