Square D · Electronic Components
NQ0B42-4AB
Circuit Breaker Box
Part NumberNQ0B42-4AB
ManufacturerSquare D
AvailabilityAvailable to order — request a quote
Specifications
NSN5925-00-881-0537 (NSN)
Federal Item NameCIRCUIT BREAKER BOX
Federal Supply Class5925 — Circuit Breakers
Surface TreatmentPAINT
Fragility FactorMODERATELY RUGGED
Style DesignatorRECTANGULAR, FLUSH MOUNTING
Ground Connection Type For Which DSOLID
MaterialSTEEL
Overall Height44.000 INCHES NOMINAL
Overall Width20.000 INCHES NOMINAL
Storage TypeGENERAL PURPOSE WAREHOUSE
Main Line Maximum Ac Voltage Ratin240.0
System For Which DesignedFOUR WIRE THREE PHASE
Overall Depth5.750 INCHES NOMINAL
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 NQ0B42-4AB available?
We can source NQ0B42-4AB 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 NQ0B42-4AB by Square D obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If NQ0B42-4AB 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 NQ0B42-4AB?
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 NQ0B42-4AB?
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.