Meggitt Safety Systems Inc. · Electronic Components
2S0121-4
Switch, Rotary
Part Number2S0121-4
ManufacturerMeggitt Safety Systems Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-869-5938 (NSN)
Federal Item NameSWITCH,ROTARY
Federal Supply Class5930 — Switches
Switch Contact Basic DesignNONPILE-UP SYMMETRICAL AND NONPILE-UP NONSYMMETRICAL
First Flat Length0.250 INCHES NOMINAL SINGLE ACTUATOR
Nonturn Device Radius0.375 INCHES NOMINAL AT 2:00 OCLOCK
Pole Quantity2 SECOND SECTION FRONT
Thread Length0.250 INCHES NOMINAL SINGLE MOUNTING FACILITY
Contact Switching ActionMAKES BEFORE BREAKS THIRD SECTION FRONT
Switch Actuator Stop Device TypeFIXED STOP SINGLE ACTUATOR
Nominal Thread Size0.250 INCHES SINGLE MOUNTING FACILITY
Mounting MethodTHREADED BUSHING SINGLE MOUNTING FACILITY
Shaft Flat Slot Angular Location120.0 DEGREES FROM NONTURN DEVICE SINGLE ACTUATOR
Switch Actuator Positioning Increm30.0 DEGREES SINGLE ACTUATOR
Vendor Part Numbers5-21781-761
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 2S0121-4 available?
We can source 2S0121-4 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 2S0121-4 by Meggitt Safety Systems Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 2S0121-4 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 2S0121-4?
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 2S0121-4?
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.