PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12780Transformer,power

Freed Transformer Co · NSN 5950-00-647-7288 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-647-7288 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-647-7288. Primary manufacturer part number: 12780.
Features
  • Transformer,power — FSC 5950
  • Nominal Thread Size: 0.250 INCHES SINGLE GROUP IN
  • Reliability Indicator: NOT ESTABLISHED
  • Center to Center Distance Between Mounting Facilities Parallel to Length: 2.500 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
  • Winding Operating Voltage: 110.00 AC VOLTS NOMINAL AND 122.00 AC VOLTS NOMINAL AND 145.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
  • Winding Operating Voltage: 1.00 AC KILOVOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
  • Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-00-647-7288, 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 Freed Transformer Co. Government technical data includes 16 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. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-647-7288
Primary Part Number12780
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerFreed Transformer Co
StatusACTIVE
Nominal Thread Size0.250 INCHES SINGLE GROUP IN
Reliability IndicatorNOT ESTABLISHED
Center to Center Distance Between Mounting Facilities Parallel to Length2.500 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Winding Operating Voltage110.00 AC VOLTS NOMINAL AND 122.00 AC VOLTS NOMINAL AND 145.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Winding Operating Voltage1.00 AC KILOVOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Frequency Rating60.0 HERTZ NOMINAL SINGLE COMPONENT
Mounting MethodTHREADED STUD(S) SINGLE GROUP
Mounting Facility Quantity4 SINGLE GROUP
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Body Length5.000 INCHES NOMINAL IN
Thread Quantity Per Inch20 SINGLE GROUP
Terminal Type and Quantity7 STANDOFF, SOLDER LUG
Inclosure TypeFULLY INCLOSED
Center to Center Distance Between Mounting Facilities Parallel to Width3.750 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5342-00-232-103012780 INTERCHANGEABLE
Rod,boom
Time Manufacturing Company Dba Time Manufacturing Company
3120-00-371-613212780 INTERCHANGEABLE
Bearing,washer,thrust
Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
5962-00-595-895312780 INTERCHANGEABLE
Microcircuit,linear
Northrop Grumman Systems Corp Dba Northrop Grumman Systems Corp
1560-00-785-361212780 INTERCHANGEABLE
Bearing Assembly,pu
Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company
3120-00-980-4456127-80 INTERCHANGEABLE
Bearing,sleeve
Northfield Precision Instrument Corp Dba Northfield Precision Instrument Corp
5330-01-017-107412780 INTERCHANGEABLE
Seal,air Conditione
Noske-Kaeser Germany Gmbh
5950-01-037-624912780 INTERCHANGEABLE
Transformer,power
Standex Electronics, Inc.
6250-01-448-68751278000 INTERCHANGEABLE
Ballast,lamp
Labconco Corp
5340-01-579-8559 INTERCHANGEABLE
Bracket,mounting
Cross-Reference Index
Part NumberManufacturer
12780 PRIMARY Freed Transformer Co (USA)
Related Parts
5342-00-232-1030INTERCHANGEABLE
ROD,BOOM
12780
3120-00-371-6132INTERCHANGEABLE
BEARING,WASHER,THRUST
12780
5962-00-595-8953INTERCHANGEABLE
MICROCIRCUIT,LINEAR
12780
1560-00-785-3612INTERCHANGEABLE
BEARING ASSEMBLY,PU
12780
3120-00-980-4456INTERCHANGEABLE
BEARING,SLEEVE
127-80
5330-01-017-1074INTERCHANGEABLE
SEAL,AIR CONDITIONE
12780
5950-01-037-6249INTERCHANGEABLE
TRANSFORMER,POWER
12780
6250-01-448-6875INTERCHANGEABLE
BALLAST,LAMP
1278000
5340-01-579-8559INTERCHANGEABLE
BRACKET,MOUNTING

Frequently Asked Questions

What is NSN 5950-00-647-7288?

NSN 5950-00-647-7288 is a Transformer,power, manufactured by Freed Transformer Co, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-647-7288?

NSN 5950-00-647-7288 has 1 cross-referenced part number: 12780 (Freed Transformer Co).

What NSN replaces 5950-00-647-7288?

There are 9 known substitutes for 5950-00-647-7288: 5342-00-232-1030, 3120-00-371-6132, 5962-00-595-8953 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12780?

Key specifications for 12780: Nominal Thread Size: 0.250 INCHES SINGLE GROUP IN; Reliability Indicator: NOT ESTABLISHED; Center to Center Distance Between Mounting Facilities Parallel to Length: 2.500 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN; Winding Operating Voltage: 110.00 AC VOLTS NOMINAL AND 122.00 AC VOLTS NOMINAL AND 145.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY. 18 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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