The Dewey Electronics Corporation · Electronic Components
40739-1
Switch, Rotary
Part Number40739-1
ManufacturerThe Dewey Electronics Corporation
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-238-6275 (NSN)
Federal Item NameSWITCH,ROTARY
Federal Supply Class5930 — Switches
Contact Load Current Rating500.0 MILLIAMPERES RESISTIVE LOAD AND 50.0 MILLIAMPERES INDUCTIVE LOAD DC AT SEA LEVEL
Switch Actuator Positioning Increm30.0 DEGREES SINGLE ACTUATOR
Test Data Document81349-MIL-S-3786/3 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE D
Thread Series DesignatorUNEF SINGLE MOUNTING FACILITY
Style DesignatorCIRCULAR WAFER, BUSHING MOUNT
Contact Switching ActionBREAKS BEFORE MAKES SINGLE SECTION REAR
Detent Rotational Torque Range+1.000 TO 6.000 INCH-POUNDS SINGLE ACTUATOR
Shaft Flat Slot Angular Location300.0 DEGREES FROM NONTURN DEVICE SINGLE ACTUATOR
Switch Actuator Stop Device TypeFIXED STOP SINGLE ACTUATOR
Contact Voltage Rating In Volts28.0 DC AT SEA LEVEL
Mounting MethodTHREADED BUSHING WITH PANEL SEAL SINGLE MOUNTING FACILITY
Vendor Part Numbers269983F1
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 40739-1 available?
We can source 40739-1 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 40739-1 by The Dewey Electronics Corporation obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 40739-1 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 40739-1?
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 40739-1?
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.