PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

11977Transformer,power

Robert M. Hadley Company, Inc. · NSN 5950-00-725-6942 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-725-6942 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-725-6942. Primary manufacturer part number: 11977.
Features
  • Transformer,power — FSC 5950
  • Center to Center Distance Between Mounting Facilities Parallel to Length: 1.188 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
  • Winding Operating Current: 2.0 AMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
  • Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
  • Body Height: 2.375 INCHES NOMINAL IN
  • Body Width: 1.312 INCHES NOMINAL IN
  • Frequency Rating: 400.0 HERTZ NOMINAL SINGLE COMPONENT
  • Winding Operating Voltage: 6.30 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-00-725-6942, is classified within Federal Supply Class 5950 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Robert M. Hadley Company, Inc.. Government technical data includes 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-725-6942
Primary Part Number11977
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerRobert M. Hadley Company, Inc.
StatusACTIVE
Center to Center Distance Between Mounting Facilities Parallel to Length1.188 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Winding Operating Current2.0 AMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Body Height2.375 INCHES NOMINAL IN
Body Width1.312 INCHES NOMINAL IN
Frequency Rating400.0 HERTZ NOMINAL SINGLE COMPONENT
Winding Operating Voltage6.30 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
Reliability IndicatorNOT ESTABLISHED
Center to Center Distance Between Mounting Facilities Parallel to Width1.188 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Mounting Facility Quantity4 SINGLE GROUP
Thread Quantity Per Inch32 SINGLE GROUP
Mounting MethodTHREADED STUD(S) SINGLE GROUP
Winding Operating Current125.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
Winding Function and Quantity1 PRIMARY AND 2 SECONDARY SINGLE COMPONENT
Winding Operating Voltage52.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY
Body Length1.312 INCHES NOMINAL IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Inclosure TypeHERMETICALLY SEALED
Nominal Thread Size0.138 INCHES SINGLE GROUP IN
Terminal Type and Quantity7 TAB, SOLDER LUG
Winding Operating Voltage115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5306-00-298-864011977 INTERCHANGEABLE
Bolt,machine
Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
5365-00-597-1326 INTERCHANGEABLE
Shim
1650-00-757-447811977 INTERCHANGEABLE
Spacer,seat,pilot V
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
8920-01-333-236411977 INTERCHANGEABLE
Cereal,oat Bran
General Mills Inc
2840-01-412-75374056T05P09 INTERCHANGEABLE
Seal,air,aircraft Gas Turbine En
Eaton Corporation Div Fed
9510-01-450-879711977 INTERCHANGEABLE
Bar,metal
Tulsa Winch, Inc.
5305-01-547-714311977 INTERCHANGEABLE
Screw,machine
Aimpoint Inc Dba Aimpoint Inc
6515-01-573-9777C8373-3 INTERCHANGEABLE
Magnifier
Cardinal Health 200, Llc
Cross-Reference Index
Part NumberManufacturer
11977 PRIMARY Robert M. Hadley Company, Inc. (USA)
Related Parts
5306-00-298-8640INTERCHANGEABLE
BOLT,MACHINE
11977
5365-00-597-1326INTERCHANGEABLE
SHIM
1650-00-757-4478INTERCHANGEABLE
SPACER,SEAT,PILOT V
11977
8920-01-333-2364INTERCHANGEABLE
CEREAL,OAT BRAN
11977
2840-01-412-7537INTERCHANGEABLE
SEAL,AIR,AIRCRAFT GAS TURBINE EN
4056T05P09
9510-01-450-8797INTERCHANGEABLE
BAR,METAL
11977
5305-01-547-7143INTERCHANGEABLE
SCREW,MACHINE
11977
6515-01-573-9777INTERCHANGEABLE
MAGNIFIER
C8373-3

Frequently Asked Questions

What is NSN 5950-00-725-6942?

NSN 5950-00-725-6942 is a Transformer,power, manufactured by Robert M. Hadley Company, Inc., classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-725-6942?

NSN 5950-00-725-6942 has 1 cross-referenced part number: 11977 (Robert M. Hadley Company, Inc.).

What NSN replaces 5950-00-725-6942?

There are 8 known substitutes for 5950-00-725-6942: 5306-00-298-8640, 5365-00-597-1326, 1650-00-757-4478 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 11977?

Key specifications for 11977: Center to Center Distance Between Mounting Facilities Parallel to Length: 1.188 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN; Winding Operating Current: 2.0 AMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY; Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT; Body Height: 2.375 INCHES NOMINAL IN. 21 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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