Raytheon · Electronic Components
721857-21
Switch, Thermostatic
Part Number721857-21
ManufacturerRaytheon
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-01-135-3836 (NSN)
Federal Item NameSWITCH,THERMOSTATIC
Federal Supply Class5930 — Switches
Overall Height0.607 INCHES NOMINAL
Temp Sensing Element TypeINTERNAL SENSOR
Nonpile Up Contact Arrangement1 POLE, SINGLE THROW, NORMALLY CLOSED, MOMENTARY ACTION
Contact Load Current Rating5.0 AMPERES RESISTIVE LOAD THIRD VOLTAGE
Contact AdjustabilityDEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE
Contact Voltage Rating In Volts30.0 AC AT SEA LEVEL SECOND VOLTAGE
Features ProvidedHERMETICALLY SEALED CASE
Media For Which DesignedGAS
Overall Diameter0.640 INCHES MAXIMUM
Operating Temp Rating-80.0 FAHRENHEIT MINIMUM AND 550.0 FAHRENHEIT MAXIMUM
Terminal TypeTAB, SOLDER LUG
Vendor Part Numbers11041-40-43
Cancelled NSN5930-01-007-4585 (cancelled)
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 721857-21 available?
We can source 721857-21 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 721857-21 by Raytheon obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 721857-21 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 721857-21?
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 721857-21?
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.