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Square D  · Electronic Components

QO240

MINIATURE CIRCUIT BREAKER 120/240V 40A_

Part NumberQO240
ManufacturerSquare D
AvailabilityAvailable to order — request a quote

Specifications

Cancelled NSN5925-01-618-1224 (cancelled)
NSN Cancelled Date01-FEB-2015
Federal Item NameCIRCUIT BREAKER
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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

Frequently asked

Is QO240 available?
We can source QO240 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 QO240 by Square D obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If QO240 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 QO240?
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 QO240?
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.