Electro Switch Corp. · Electronic Components
3957
Switch Section, Rotary
Part Number3957
ManufacturerElectro Switch Corp.
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-075-2308 (NSN)
Federal Item NameSWITCH SECTION,ROTARY
Federal Supply Class5930 — Switches
Switch Contact Basic DesignNONPILE-UP SYMMETRICAL
Body Thickness0.062 INCHES NOMINAL
Contact Switching ActionMAKES BEFORE BREAKS SINGLE SECTION REAR
Throw Quantity3 SINGLE SECTION REAR
Contact Voltage Rating In Volts28.0 DC AT SEA LEVEL
Pole Quantity1 SINGLE SECTION FRONT
Style DesignatorSWITCH SECTION, ROTARY
Contact Load Current Rating1.0 AMPERES RESISTIVE LOAD AC AT SEA LEVEL
Conductor Quantity2
Strand Awg Size Per Conductor36 ALL CONDUCTORS
Strand Quantity Per Conductor65 ALL CONDUCTORS
Conductor FormSTRANDED ALL CONDUCTORS
Conductor Length5.000 INCHES NOMINAL ALL CONDUCTORS
FSC Application DataTEST SET,ELECTRONIC SYSTEMS,EXCEPT SPECIALLY DESIGNED
Surface TreatmentTIN ALLOY CORE CONDUCTOR ALL CONDUCTORS
Round Conductor Size18 AWG ALL CONDUCTORS
MaterialCOPPER CORE CONDUCTOR ALL CONDUCTORS
Vendor Part NumbersBNB101
ESD/EMICode A — ESD/EMI sensitive item
Conductor Accommodation TypeFLAT LUG SLOTTED W/SINGLE NOTCH ON EACH SIDE SINGLE END
Quick Disconnect StyleTAB RECEPTACLE
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 3957 available?
We can source 3957 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 3957 by Electro Switch Corp. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 3957 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 3957?
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 3957?
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.