PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20307Transformer,power

Freed Transformer Co · NSN 5950-00-645-8703 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-645-8703 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-645-8703. Primary manufacturer part number: 20307.
Features
  • Transformer,power — FSC 5950
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
  • Reliability Indicator: NOT ESTABLISHED
  • Terminal Type and Quantity: 9 TAB, SOLDER LUG
  • Winding Operating Current: 2.0 AMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
  • Winding Operating Voltage: 600.00 AC VOLTS NOMINAL SINGLE COMPONENT THIRD SECONDARY
  • Inclosure Type: HERMETICALLY SEALED
  • Body Width: 3.375 INCHES NOMINAL IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-00-645-8703, 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 23 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. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-645-8703
Primary Part Number20307
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerFreed Transformer Co
StatusACTIVE
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Reliability IndicatorNOT ESTABLISHED
Terminal Type and Quantity9 TAB, SOLDER LUG
Winding Operating Current2.0 AMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
Winding Operating Voltage600.00 AC VOLTS NOMINAL SINGLE COMPONENT THIRD SECONDARY
Inclosure TypeHERMETICALLY SEALED
Body Width3.375 INCHES NOMINAL IN
Winding Operating Voltage117.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Frequency Rating366.0 HERTZ MINIMUM AND 455.0 HERTZ MAXIMUM SINGLE COMPONENT
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Nominal Thread Size0.164 INCHES SINGLE GROUP IN
Center to Center Distance Between Mounting Facilities Parallel to Width2.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Winding Function and Quantity1 PRIMARY AND 3 SECONDARY SINGLE COMPONENT
Body Height3.125 INCHES NOMINAL IN
Winding Operating Voltage6.30 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY
Winding Operating Current600.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT THIRD SECONDARY
Winding Operating Current3.6 AMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
Mounting Facility Quantity4 SINGLE GROUP
Center to Center Distance Between Mounting Facilities Parallel to Length2.500 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Thread Quantity Per Inch32 SINGLE GROUP
Body Length4.500 INCHES NOMINAL IN
Winding Operating Voltage5.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
Mounting MethodTHREADED STUD(S) SINGLE GROUP
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5975-00-442-30032142 INTERCHANGEABLE
Box Connector,electrical
Raco, a Division of Hubbell Incorporated(delaware)
1630-00-832-209320307 INTERCHANGEABLE
Parts Kit,cure Date
Moog Inc
6340-00-942-131420-307 INTERCHANGEABLE
Component Board
Kidde Technologies, Inc Div Kidde Aerospace and Defense
3455-01-041-502350-10508 4533-7 INTERCHANGEABLE
Reamer,machine
Union Butterfield Corp P O Box 9000 Crystal Lake Il 60039
5920-01-138-1764 INTERCHANGEABLE
Fuseholder,block
5365-01-195-572520307 INTERCHANGEABLE
Shim
Moog Inc. Dba Ampac-Isp Corp
5950-01-314-803820307 INTERCHANGEABLE
Transformer,power
Allied Systems Company Dba Allied Systems Co
6685-01-337-1952 INTERCHANGEABLE
Gage,vacuum,indicating
5120-01-349-1435 INTERCHANGEABLE
Wrench,box and Open End,combinat
5120-01-399-9450J412 INTERCHANGEABLE
Clamp,c
The Stanley Works Dba Stanley Proto
Cross-Reference Index
Part NumberManufacturer
20307 PRIMARY Freed Transformer Co (USA)
Related Parts
5975-00-442-3003INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
2142
1630-00-832-2093INTERCHANGEABLE
PARTS KIT,CURE DATE
20307
6340-00-942-1314INTERCHANGEABLE
COMPONENT BOARD
20-307
3455-01-041-5023INTERCHANGEABLE
REAMER,MACHINE
50-10508 4533-7
5920-01-138-1764INTERCHANGEABLE
FUSEHOLDER,BLOCK
5365-01-195-5725INTERCHANGEABLE
SHIM
20307
5950-01-314-8038INTERCHANGEABLE
TRANSFORMER,POWER
20307
6685-01-337-1952INTERCHANGEABLE
GAGE,VACUUM,INDICATING
5120-01-349-1435INTERCHANGEABLE
WRENCH,BOX AND OPEN END,COMBINAT
5120-01-399-9450INTERCHANGEABLE
CLAMP,C
J412
6240-01-463-5881INTERCHANGEABLE
LAMP,FLUORESCENT

Frequently Asked Questions

What is NSN 5950-00-645-8703?

NSN 5950-00-645-8703 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 5950-00-645-8703?

NSN 5950-00-645-8703 has 1 cross-referenced part number: 20307 (Freed Transformer Co).

What NSN replaces 5950-00-645-8703?

There are 11 known substitutes for 5950-00-645-8703: 5975-00-442-3003, 1630-00-832-2093, 6340-00-942-1314 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20307?

Key specifications for 20307: Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP; Reliability Indicator: NOT ESTABLISHED; Terminal Type and Quantity: 9 TAB, SOLDER LUG; Winding Operating Current: 2.0 AMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY. 23 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com