Entron Industries Limited Partnership · Electronic Components
21S4
Switch, Thermostatic
Part Number21S4
ManufacturerEntron Industries Limited Partnership
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-998-4246 (NSN)
Federal Item NameSWITCH,THERMOSTATIC
Federal Supply Class5930 — Switches
Terminal TypeTAB, SOLDER LUG
Contact Action StimulusINCREASE
Contact Stimulus Rating158.00 ACTUATION POINT NOMINAL DEGREES FAHRENHEIT AND 138.00 DEACTUATION POINT NOMINAL DEGREES FAHRENHEIT
Contact AdjustabilityACTUATION POINT NOT ADJUSTABLE
Contact Load Current Rating1.0 AMPERES RESISTIVE LOAD SINGLE VOLTAGE
Overall Width0.660 INCHES NOMINAL
Contact Voltage Rating In Volts125.0 AC AT SEA LEVEL SINGLE VOLTAGE
Overall Length1.125 INCHES NOMINAL
Mounting MethodBRACKET(S)
Overall Height0.305 INCHES NOMINAL
Nonpile Up Contact Arrangement1 POLE, SINGLE THROW, NORMALLY OPEN, MOMENTARY ACTION
Vendor Part Numbers2614E30
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 21S4 available?
We can source 21S4 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 21S4 by Entron Industries Limited Partnership obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 21S4 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 21S4?
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 21S4?
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.