Janco · Electronic Components
3-1900-1B4
Switch, Rotary
Part Number3-1900-1B4
ManufacturerJanco
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-931-7468 (NSN)
Federal Item NameSWITCH,ROTARY
Federal Supply Class5930 — Switches
Switch Contact Basic DesignNONPILE-UP SYMMETRICAL
Terminal TypeTAB, SOLDER LUG
Pole Quantity1 SINGLE SECTION REAR
First Flat Length0.250 INCHES NOMINAL SINGLE ACTUATOR
Switch Actuator Positioning Increm22.5 DEGREES SINGLE ACTUATOR
Switch Actuator Indexing Position4 SINGLE ACTUATOR
Nominal Thread Size0.375 INCHES SINGLE MOUNTING FACILITY
Thread Class2A SINGLE MOUNTING FACILITY
Contact Switching ActionMAKES BEFORE BREAKS SINGLE SECTION REAR
Throw Quantity4 SINGLE SECTION REAR
Hazardous Locations EnvironmentalEXPLOSION PROOF
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 3-1900-1B4 available?
We can source 3-1900-1B4 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 3-1900-1B4 by Janco obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 3-1900-1B4 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 3-1900-1B4?
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 3-1900-1B4?
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.