Grimes Aerospace · Electronic Components
B9977-1
Transformer, Power Autotransforme
Part NumberB9977-1
ManufacturerGrimes Aerospace
AvailabilityAvailable to order — request a quote
Specifications
NSN5950-00-683-7216 (NSN)
Federal Item NameTRANSFORMER,POWER AUTOTRANSFORME
Federal Supply Class5950 — Coils and Transformers
Body Length2.650 INCHES MAXIMUM
Winding Function And Quantity1 PRIMARY, FIXED AUTOTRANSFORMER TYPE SINGLE COMPONENT
Winding Operating Voltage28.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Terminal Type And Quantity3 WIRE LEAD
Input Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Winding Power Rating1.0 KILOVOLT-AMPERES SINGLE COMPONENT SINGLE PRIMARY INPUT
Winding Operating Current35.0 AMPERES AC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Inclosure TypePARTIALLY INCLOSED, DOUBLE SHELL
Body Width1.725 INCHES MAXIMUM
Frequency Rating400.0 HERTZ NOMINAL SINGLE COMPONENT
Mounting MethodUNTHREADED HOLE(S) SINGLE GROUP
Vendor Part NumbersST-210, 59T11C1608
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 B9977-1 available?
We can source B9977-1 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 B9977-1 by Grimes Aerospace obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If B9977-1 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 B9977-1?
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 B9977-1?
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.