United Electric Controls Company · Electronic Components
E121-5BS
Switch, Thermostatic
Part NumberE121-5BS
ManufacturerUnited Electric Controls Company
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-01-186-9662 (NSN)
Federal Item NameSWITCH,THERMOSTATIC
Federal Supply Class5930 — Switches
Contact Load Current Rating15.0 AMPERES RESISTIVE LOAD FIRST VOLTAGE
Nonpile Up Contact Arrangement1 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
Overall Length8.438 INCHES NOMINAL
Overall Width4.250 INCHES NOMINAL
Unthreaded Mounting Hole Diameter0.250 INCHES MINIMUM
Terminal TypeSCREW
Temp Sensing Element TypeBULB
Media For Which DesignedGAS OR LIQUID
Contact Voltage Rating In Volts125.0 AC AT SEA LEVEL FIRST VOLTAGE
Hazardous Locations EnvironmentalEXPLOSION PROOF
Frequency In Hertz60.0 SECOND VOLTAGE
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 E121-5BS available?
We can source E121-5BS 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 E121-5BS by United Electric Controls Company obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If E121-5BS 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 E121-5BS?
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 E121-5BS?
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.