Electro Switch Corp. · Electronic Components
8178B
Switch, Rotary
Part Number8178B
ManufacturerElectro Switch Corp.
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-548-6643 (NSN)
Federal Item NameSWITCH,ROTARY
Federal Supply Class5930 — Switches
Style DesignatorTAP, CIRCUIT SELECTOR
Contact Load Current Rating30.0 AMPERES RESISTIVE LOAD DC AT SEA LEVEL
Switch Actuator Stop Device TypeFIXED STOP SINGLE ACTUATOR
Shaft Diameter0.375 INCHES NOMINAL SINGLE ACTUATOR
Shaft Length4.500 INCHES NOMINAL SINGLE ACTUATOR
Pole Quantity2 EACH SECTION REAR
First Flat Length0.875 INCHES NOMINAL SINGLE ACTUATOR
Thread Quantity Per Inch20 SINGLE MOUNTING FACILITY
Contact Voltage Rating In Volts500.0 AC AT SEA LEVEL
Shaft TypeROUND, FLATTED, THREADED HOLE SINGLE ACTUATOR
Longest Horizontal Distance Betwee2.094 INCHES NOMINAL SINGLE MOUNTING FACILITY
Vendor Part NumbersAS114
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 8178B available?
We can source 8178B 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 8178B by Electro Switch Corp. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 8178B 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 8178B?
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 8178B?
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.