Janco · Electronic Components
4-1900-2B3S
Switch, Rotary
Part Number4-1900-2B3S
ManufacturerJanco
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-565-9341 (NSN)
Federal Item NameSWITCH,ROTARY
Federal Supply Class5930 — Switches
Style DesignatorTAP, CIRCULAR, BUSHING MOUNT
Contact Load Current Rating2.0 AMPERES INDUCTIVE LOAD AND 3.0 AMPERES RESISTIVE LOAD DC AT SEA LEVEL
Terminal TypeTAB, SOLDER LUG
Nonturn Device Radius0.432 INCHES NOMINAL AT 3:00 OCLOCK
Thread Class2A SINGLE MOUNTING FACILITY
Switch Actuator Indexing Position3 SINGLE ACTUATOR
Hazardous Locations EnvironmentalCORROSION RESISTANT AND EXPLOSION PROOF AND HUMIDITY RESISTANT
Thread Series DesignatorUNEF SINGLE MOUNTING FACILITY
Shaft Diameter0.248 INCHES MINIMUM AND 0.252 INCHES MAXIMUM SINGLE ACTUATOR
Nonturn Device TypePIN AT 3:00 OCLOCK
Pole Quantity1 EACH SECTION FRONT
Vendor Part Numbers352250012185
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 4-1900-2B3S available?
We can source 4-1900-2B3S 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 4-1900-2B3S by Janco obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 4-1900-2B3S 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 4-1900-2B3S?
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 4-1900-2B3S?
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.