Janco · Electronic Components
17-1957-2B4
Switch, Rotary
Part Number17-1957-2B4
ManufacturerJanco
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-946-3065 (NSN)
Federal Item NameSWITCH,ROTARY
Federal Supply Class5930 — Switches
Contact Load Current Rating0.50 AMPERES RESISTIVE LOAD DC AT SEA LEVEL
Nominal Thread Size0.375 INCHES SINGLE MOUNTING FACILITY
Hazardous Locations EnvironmentalEXPLOSION PROOF
Rotor Through Connection Quantity2 SINGLE SECTION
Switch Contact Basic DesignNONPILE-UP NONSYMMETRICAL
Thread Length0.440 INCHES NOMINAL SINGLE MOUNTING FACILITY
Contact Voltage Rating In Volts150.0 AC AT SEA LEVEL
Flat Height0.210 INCHES NOMINAL SINGLE ACTUATOR
Switch Actuator Stop Device TypeFIXED STOP SINGLE ACTUATOR
Switch Actuator Indexing Position4 SINGLE ACTUATOR
Mounting MethodTHREADED BUSHING SINGLE MOUNTING FACILITY
Vendor Part Numbers259-9497-030
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 17-1957-2B4 available?
We can source 17-1957-2B4 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 17-1957-2B4 by Janco obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 17-1957-2B4 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 17-1957-2B4?
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 17-1957-2B4?
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.