General Dynamics Mission Systems, Inc. · Electronic Components
21856A
Reactor — Coils and Transformers
Part Number21856A
ManufacturerGeneral Dynamics Mission Systems, Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5950-00-648-3368 (NSN)
Federal Item NameREACTOR
Federal Supply Class5950 — Coils and Transformers
Inductance Rating4.00 HENRY MAXIMUM SINGLE COMPONENT SINGLE WINDING
Distance Between Mounting Facility1.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP
Inclosure TypeHERMETICALLY SEALED
Terminal Type And Quantity2 STANDOFF, SOLDER LUG
Body Length1.500 INCHES NOMINAL
Body Width1.375 INCHES NOMINAL
Mounting Facility Quantity2 SINGLE GROUP
Winding Quantity1 SINGLE COMPONENT
Mounting MethodTHREADED STUD(S) SINGLE GROUP
Dc Resistance Rating In Ohms140.000 SINGLE COMPONENT SINGLE WINDING
Body Height2.188 INCHES NOMINAL
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 21856A available?
We can source 21856A 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 21856A by General Dynamics Mission Systems, Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 21856A 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 21856A?
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 21856A?
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.