Janco · Electronic Components
1905MC-4-7
Switch, Rotary
Part Number1905MC-4-7
ManufacturerJanco
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-137-4244 (NSN)
Federal Item NameSWITCH,ROTARY
Federal Supply Class5930 — Switches
Contact Switching ActionMAKES BEFORE BREAKS FOURTH SECTION REAR
Style DesignatorTAP, CIRCULAR, BUSHING MOUNT
Thread Series DesignatorUNEF SINGLE MOUNTING FACILITY
Test Data Document81349-MIL-S-3786/4 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE D
Contact Load Current Rating500.0 MILLIAMPERES RESISTIVE LOAD AND 250.0 MILLIAMPERES INDUCTIVE LOAD DC AT SEA LEVEL
Switch Actuator Positioning Increm30.0 DEGREES SINGLE ACTUATOR
Detent Rotational Torque Range+12.000 TO 80.000 INCH-OUNCES SINGLE ACTUATOR
Switch Actuator Stop Device TypeFIXED STOP SINGLE ACTUATOR
Rotor Through Connection Quantity1 EACH SECTION
Flat Height0.214 INCHES NOMINAL SINGLE ACTUATOR
Operating Temp Range-65.0 TO 125.0 CELSIUS
Vendor Part NumbersGS835EY4C7
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 1905MC-4-7 available?
We can source 1905MC-4-7 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 1905MC-4-7 by Janco obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 1905MC-4-7 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 1905MC-4-7?
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 1905MC-4-7?
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.