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US Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir · Electronic Components
SM-A-742478-3
Switch, Push
Part NumberSM-A-742478-3
ManufacturerUS Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-396-3671 (NSN)
Federal Item NameSWITCH,PUSH
Federal Supply Class5930 — Switches
Overall Height2.620 INCHES NOMINAL
Thread Series DesignatorUNS
Contact Load Current Rating At Max2.000 AMPERES RESISTIVE DC AND 1.500 AMPERES INDUCTIVE DC AND 1.000 AMPERES LAMP DC AND 2.000 AMPERES RESISTIVE AC AND 1
Precious Material And LocationTERMINALS SILVER AND TERMINAL SURFACES GOLD
Nonpile Up Contact Arrangement1 TWO CIRCUIT, DOUBLE BREAK/DOUBLE MAKE, ONE POSITION MOMENTARY SINGLE SWITCH UNIT
Terminal Type And Quantity6 TAB, SOLDER LUG
Mounting MethodTHREADED BUSHING
Thread Quantity Per Inch32
Nominal Thread Size0.469 INCHES
Maximum Voltage Rating In Volts115.0 AC AND 28.0 DC
Features ProvidedACTUATOR SEAL
Vendor Part Numbers66S04A/045
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 SM-A-742478-3 available?
We can source SM-A-742478-3 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 SM-A-742478-3 by US Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If SM-A-742478-3 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 SM-A-742478-3?
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 SM-A-742478-3?
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.