Hdt Expeditionary Systems Inc. · Electronic Components
3949
Switch, Thermostatic
Part Number3949
ManufacturerHdt Expeditionary Systems Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-01-022-5123 (NSN)
Federal Item NameSWITCH,THERMOSTATIC
Federal Supply Class5930 — Switches
Terminal TypeTAB, SOLDER LUG
Unthreaded Mounting Hole Diameter0.172 INCHES NOMINAL
Media For Which DesignedGAS OR LIQUID
Contact Stimulus Rating153.00 ACTUATION POINT NOMINAL DEGREES FAHRENHEIT
Overall Height0.656 INCHES NOMINAL
Overall Width0.562 INCHES NOMINAL
Mounting MethodUNTHREADED HOLE(S)
Contact AdjustabilityACTUATION POINT NOT ADJUSTABLE
Contact Action StimulusINCREASE
Body Length1.734 INCHES NOMINAL
Style DesignatorRECTANGULAR, OPEN FRAME
Vendor Part NumbersJS-47-153DEG F
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 3949 available?
We can source 3949 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 3949 by Hdt Expeditionary Systems Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 3949 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 3949?
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 3949?
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.