Electro Switch Corp. · Electronic Components
121905LL
Switch, Rotary
Part Number121905LL
ManufacturerElectro Switch Corp.
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-548-4220 (NSN)
Federal Item NameSWITCH,ROTARY
Federal Supply Class5930 — Switches
Mounting Facility PatternFOUR POSITION CIRCULAR SINGLE MOUNTING FACILITY
Knob Manufacturer Code82121
Shaft Diameter0.250 INCHES NOMINAL SINGLE ACTUATOR
Features ProvidedACTUATOR KNOB
Individual Section Quantity5
Switch Actuator Indexing Position3 SINGLE ACTUATOR
Contact Switching ActionBREAKS BEFORE MAKES EACH SECTION FRONT
Flat Height0.219 INCHES NOMINAL SINGLE ACTUATOR
First Flat Length0.438 INCHES NOMINAL SINGLE ACTUATOR
Shaft Length0.875 INCHES NOMINAL SINGLE ACTUATOR
Switch Actuator Positioning Increm90.0 DEGREES SINGLE ACTUATOR
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 121905LL available?
We can source 121905LL 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 121905LL by Electro Switch Corp. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 121905LL 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 121905LL?
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 121905LL?
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.