National Security Agency · Electronic Components
0N278443-4
Switch, Rotary
Part Number0N278443-4
ManufacturerNational Security Agency
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-01-096-5907 (NSN)
Federal Item NameSWITCH,ROTARY
Federal Supply Class5930 — Switches
Contact Load Current Rating25.0 MILLIAMPERES RESISTIVE LOAD AND 10.0 MILLIAMPERES INDUCTIVE LOAD DC AT ALTITUDE
Style DesignatorTAP, CIRCULAR, BUSHING MOUNT
Shaft TypeROUND, FLATTED SINGLE ACTUATOR
Switch Actuator Stop Device TypeFIXED STOP SINGLE ACTUATOR
Pole Quantity1 SINGLE SECTION FRONT
Nominal Thread Size0.250 INCHES SINGLE MOUNTING FACILITY
Shaft Diameter0.125 INCHES NOMINAL SINGLE ACTUATOR
Flat Height0.094 INCHES NOMINAL SINGLE ACTUATOR
Contact Voltage Rating In Volts28.0 DC AT ALTITUDE
Individual Section Quantity1
Rotor Through Connection Quantity1 SINGLE SECTION
Vendor Part Numbers71MY231900
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 0N278443-4 available?
We can source 0N278443-4 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 0N278443-4 by National Security Agency obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 0N278443-4 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 0N278443-4?
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 0N278443-4?
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.