General Dynamics Mission Systems, Inc. · Electronic Components
21855A
Transformer, Power
Part Number21855A
ManufacturerGeneral Dynamics Mission Systems, Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5950-00-646-3397 (NSN)
Federal Item NameTRANSFORMER,POWER
Federal Supply Class5950 — Coils and Transformers
Winding Operating Voltage115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Reliability IndicatorNOT ESTABLISHED
Inclosure TypeHERMETICALLY SEALED
Terminal Type And Quantity7 TAB, SOLDER LUG
Winding Operating Current4.0 AMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Mounting MethodTHREADED STUD(S) SINGLE GROUP
Distance Between Mounting Facility1.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP
Body Length2.250 INCHES NOMINAL
Body Height2.250 INCHES NOMINAL
Nominal Thread Size0.138 INCHES SINGLE GROUP
Cancelled NSN5950-00-973-6145 (cancelled)
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 21855A available?
We can source 21855A 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 21855A by General Dynamics Mission Systems, Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 21855A 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 21855A?
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 21855A?
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.