Marine Electric Systems Inc. · Electronic Components
T1257B
Transformer, Power
Part NumberT1257B
ManufacturerMarine Electric Systems Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5950-00-405-5097 (NSN)
Federal Item NameTRANSFORMER,POWER
Federal Supply Class5950 — Coils and Transformers
Thread Quantity Per Inch32 SINGLE GROUP
Terminal Type And Quantity11 PIN
Inclosure TypeFULLY INCLOSED
Center To Center Distance Between1.500 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP
Mounting MethodTHREADED STUD(S) SINGLE GROUP
Nominal Thread Size0.190 INCHES SINGLE GROUP
Thread Series DesignatorUNF SINGLE GROUP
Mounting Facility Quantity4 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 T1257B available?
We can source T1257B 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 T1257B by Marine Electric Systems Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If T1257B 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 T1257B?
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 T1257B?
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.