Dwyer Instruments · Electronic Components
DS-239-3-2A
Switch, Thermostatic
Part NumberDS-239-3-2A
ManufacturerDwyer Instruments
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-01-253-4214 (NSN)
Federal Item NameSWITCH,THERMOSTATIC
Federal Supply Class5930 — Switches
Temp Sensing Element TypeCAPILLARY TUBE-BULB
Contact Action StimulusINCREASE
Nonpile Up Contact Arrangement1 POLE, SINGLE THROW, NORMALLY OPEN, MOMENTARY ACTION
Capillary Tube Length72.0 INCHES NOMINAL
Features ProvidedELECTRICAL ACCESS PORT
Overall Diameter7.000 INCHES NOMINAL
Bulb Length4.250 INCHES NOMINAL
Terminal TypeSCREW
Unthreaded Mounting Hole Diameter0.203 INCHES NOMINAL
Overall Height3.437 INCHES NOMINAL
Mounting Facility Circle Radius6.500 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 DS-239-3-2A available?
We can source DS-239-3-2A 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 DS-239-3-2A by Dwyer Instruments obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If DS-239-3-2A 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 DS-239-3-2A?
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 DS-239-3-2A?
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.