Freed Transformer · Electronic Components
20857
Transformer, Power
Part Number20857
ManufacturerFreed Transformer
AvailabilityAvailable to order — request a quote
Specifications
NSN5950-00-647-5836 (NSN)
Federal Item NameTRANSFORMER,POWER
Federal Supply Class5950 — Coils and Transformers
Mounting MethodTHREADED STUD(S) SINGLE GROUP
Reliability IndicatorNOT ESTABLISHED
Winding Operating Current4.0 AMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
Center To Center Distance Between2.375 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP
Winding Function And Quantity1 PRIMARY AND 2 SECONDARY SINGLE COMPONENT
Body Height3.750 INCHES NOMINAL
Winding Operating Voltage450.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY
Body Width2.875 INCHES NOMINAL
Nominal Thread Size0.190 INCHES SINGLE GROUP
Body Length3.000 INCHES NOMINAL
Thread Series DesignatorUNF SINGLE GROUP
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 20857 available?
We can source 20857 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 20857 by Freed Transformer obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 20857 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 20857?
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 20857?
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.