General Electric · Electronic Components
81H311
Transformer, Power
Part Number81H311
ManufacturerGeneral Electric
AvailabilityAvailable to order — request a quote
Specifications
NSN5950-00-553-4552 (NSN)
Federal Item NameTRANSFORMER,POWER
Federal Supply Class5950 — Coils and Transformers
Frequency Rating50.0 HERTZ MINIMUM AND 60.0 HERTZ MAXIMUM SINGLE COMPONENT
Body Width14.060 INCHES NOMINAL
Winding Operating Current1.64 AMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
Center To Center Distance Between4.469 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP
Winding Shielding MethodINTERNAL SHIELD GROUNDED TO CORE AND BROUGHT OUT TO TERMINAL SINGLE COMPONENT
Input Output Phase RelationshipTHREE PHASE TO THREE PHASE SINGLE COMPONENT
Winding Function And Quantity1 PRIMARY AND 2 SECONDARY SINGLE COMPONENT
Body Length28.810 INCHES NOMINAL
Mounting Facility Quantity14 SINGLE GROUP
Mounting MethodFLANGE SINGLE GROUP
Inclosure TypeFULLY INCLOSED WITH OIL
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 81H311 available?
We can source 81H311 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 81H311 by General Electric obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 81H311 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 81H311?
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 81H311?
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.