Square D · Electronic Components
DU221RB
SWITCH NOT FUSIBLE GD 240V 30A 2P NEMA3R
Part NumberDU221RB
ManufacturerSquare D
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-01-067-0985 (NSN)
Federal Item NameSWITCH,BOX
Terminals4 SOLDERLESS LUG
Overall Width6.000 INCHES NOMINAL
Body StyleWITH SIDE OPERATOR
Body Length9.375 INCHES NOMINAL
Actuator StyleCAST/STAMPED
Maximum Voltage Rating In Volts240.0 AC
Body Height4.500 INCHES NOMINAL
Nonpile Up Contact Arrangement2 POLE, SINGLE THROW, BOTH POSITIONS MAINTAINED SINGLE SWITCH UNIT
Contact Load Current Rating At Max30.000 AMPERES RESISTIVE AC
Hazardous Locations EnvironmentalDUSTPROOF
Federal Supply Class5930 — Switches
Terminal Type And Quantity4 SOLDERLESS LUG
Body Width5.125 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 DU221RB available?
We can source DU221RB 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 DU221RB by Square D obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If DU221RB 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 DU221RB?
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 DU221RB?
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.