Oeco, LLC · Electronic Components
12866
Transformer, Power Autotransforme
Part Number12866
ManufacturerOeco, LLC
AvailabilityAvailable to order — request a quote
Specifications
NSN5950-00-433-3961 (NSN)
Federal Item NameTRANSFORMER,POWER AUTOTRANSFORME
Federal Supply Class5950 — Coils and Transformers
Center To Center Distance Between2.050 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP
Winding Operating Voltage28.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Winding Operating Current11.5 AMPERES AC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Winding Function And Quantity1 PRIMARY, FIXED AUTOTRANSFORMER TYPE SINGLE COMPONENT
Mounting MethodFLANGE AND UNTHREADED HOLE(S) SINGLE GROUP
Body Length2.750 INCHES MAXIMUM
Input Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Frequency Rating400.0 HERTZ NOMINAL SINGLE COMPONENT
Mounting Facility Quantity4 SINGLE GROUP
Terminal Type And Quantity4 THREADED STUD
Mounting Hole Diameter0.180 INCHES MINIMUM AND 0.186 INCHES MAXIMUM SINGLE GROUP
Vendor Part Numbers24-0683-00, 43066, PEI6925, ST5M1325-001
Cross Section Outside Diameter0.531 INCHES NOMINAL
FSC Application DataTEST STATION,GYROSCOPE TUNING
Overall Length48.000 INCHES
Conductor Quantity4
Cross Sectional Shape StyleROUND
Style DesignatorINTERNAL CONNECTORS
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 12866 available?
We can source 12866 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 12866 by Oeco, LLC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 12866 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 12866?
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 12866?
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.