The Dewey Electronics Corporation · Electronic Components
21-0ALT3
Transformer, Power Autotransforme
Part Number21-0ALT3
ManufacturerThe Dewey Electronics Corporation
AvailabilityAvailable to order — request a quote
Specifications
NSN5950-00-250-1708 (NSN)
Federal Item NameTRANSFORMER,POWER AUTOTRANSFORME
Federal Supply Class5950 — Coils and Transformers
Body Width6.250 INCHES NOMINAL
Body Height6.125 INCHES NOMINAL
Mounting Facility Quantity4 SINGLE GROUP
Input Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Winding Operating Voltage115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY INPUT
Winding Power Rating370.0 VOLTS-AMPERES SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Frequency Rating60.0 HERTZ NOMINAL SINGLE COMPONENT
Inclosure TypePARTIALLY INCLOSED, HALF SHELL
Winding Function And Quantity1 PRIMARY, VARIABLE AUTOTRANSFORMER TYPE SINGLE COMPONENT
Center To Center Distance Between4.625 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP
Reliability IndicatorNOT ESTABLISHED
Cancelled NSN5950-00-311-5710 (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 21-0ALT3 available?
We can source 21-0ALT3 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 21-0ALT3 by The Dewey Electronics Corporation obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 21-0ALT3 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 21-0ALT3?
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 21-0ALT3?
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.