Electro Switch Corp. · Electronic Components
121903LW
Switch, Rotary
Part Number121903LW
ManufacturerElectro Switch Corp.
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-568-3752 (NSN)
Federal Item NameSWITCH,ROTARY
Federal Supply Class5930 — Switches
Hazardous Locations EnvironmentalDUSTPROOF
Overall Length2.906 INCHES NOMINAL
Longest Horizontal Distance Betwee1.641 INCHES NOMINAL SINGLE MOUNTING FACILITY
Switch Actuator Indexing Position4 SINGLE ACTUATOR
Shaft Diameter0.250 INCHES NOMINAL SINGLE ACTUATOR
Style DesignatorTAP, CIRCUIT SELECTOR
Longest Vertical Distance Between1.641 INCHES NOMINAL SINGLE MOUNTING FACILITY
Mounting MethodBRACKET(S) SINGLE MOUNTING FACILITY
Contact Voltage Rating In Volts125.0 AC AT SEA LEVEL
Individual Section Quantity3
Terminal TypeTAB W/SCREW
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 121903LW available?
We can source 121903LW 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 121903LW by Electro Switch Corp. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 121903LW 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 121903LW?
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 121903LW?
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.