PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20561Transformer,power

Freed Transformer Co · NSN 5950-00-647-5299 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-647-5299 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-647-5299. Primary manufacturer part number: 20561.
Features
  • Transformer,power — FSC 5950
  • Reliability Indicator: NOT ESTABLISHED
  • Thread Quantity Per Inch: 32 SINGLE GROUP
  • Winding Operating Voltage: 6.30 AC VOLTS NOMINAL SINGLE COMPONENT THIRD SECONDARY
  • Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
  • Winding Operating Current: 2.0 AMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
  • Winding Operating Voltage: 103.50 AC VOLTS NOMINAL AND 115.00 AC VOLTS NOMINAL AND 126.50 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
  • Winding Function and Quantity: 1 PRIMARY AND 3 SECONDARY 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 5950-00-647-5299, 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 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-647-5299
Primary Part Number20561
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerFreed Transformer Co
StatusACTIVE
Reliability IndicatorNOT ESTABLISHED
Thread Quantity Per Inch32 SINGLE GROUP
Winding Operating Voltage6.30 AC VOLTS NOMINAL SINGLE COMPONENT THIRD SECONDARY
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Winding Operating Current2.0 AMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
Winding Operating Voltage103.50 AC VOLTS NOMINAL AND 115.00 AC VOLTS NOMINAL AND 126.50 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Winding Function and Quantity1 PRIMARY AND 3 SECONDARY SINGLE COMPONENT
Frequency Rating47.0 HERTZ MINIMUM AND 440.0 HERTZ MAXIMUM SINGLE COMPONENT
Body Height4.500 INCHES NOMINAL IN
Winding Operating Current90.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
Mounting MethodTHREADED STUD(S) SINGLE GROUP
Center to Center Distance Between Mounting Facilities Parallel to Length3.125 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Body Width3.500 INCHES NOMINAL IN
Winding Operating Current9.0 AMPERES AC MAXIMUM SINGLE COMPONENT THIRD SECONDARY
Winding Operating Voltage5.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY
Nominal Thread Size0.190 INCHES SINGLE GROUP IN
Thread Series DesignatorUNF SINGLE GROUP
Mounting Facility Quantity4 SINGLE GROUP
Winding Operating Voltage940.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
Body Length4.125 INCHES NOMINAL IN
Terminal Type and Quantity11 STANDOFF INSULATOR
Center to Center Distance Between Mounting Facilities Parallel to Width2.625 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Inclosure TypeHERMETICALLY SEALED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-107-7567140209 INTERCHANGEABLE
Bearing,ball,annular
Fairbanks Morse, Llc
5360-00-200-4118 INTERCHANGEABLE
Spring,helical,compression
5945-00-407-70342056.1 INTERCHANGEABLE
Relay,electromagnetic
Bunn-O-Matic Corporation Div Government Sales
1680-00-420-94792056-1 INTERCHANGEABLE
Strip,retainer,seat
Cr Daniels Inc
5330-00-907-5175 INTERCHANGEABLE
Packing,preformed
5360-01-079-582719AS680 INTERCHANGEABLE
Spring,leaf
Oshkosh Defense Llc
4820-01-255-904020561-1001-1 INTERCHANGEABLE
Head,valve
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-256-029720561-1002-1 INTERCHANGEABLE
Stem,fluid Valve
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-256-029920561-801-1 INTERCHANGEABLE
Cap,valve
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-256-030920561-850-1 INTERCHANGEABLE
Sleeve and Slide,directional Con
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
Cross-Reference Index
Part NumberManufacturer
20561 PRIMARY Freed Transformer Co (USA)
9P271DWGB25 Cardwell Condenser Corp Lapointe-Admiral Div (USA)
Related Parts
3110-00-107-7567INTERCHANGEABLE
BEARING,BALL,ANNULAR
140209
5360-00-200-4118INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
5945-00-407-7034INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
2056.1
1680-00-420-9479INTERCHANGEABLE
STRIP,RETAINER,SEAT
2056-1
5330-00-907-5175INTERCHANGEABLE
PACKING,PREFORMED
5360-01-079-5827INTERCHANGEABLE
SPRING,LEAF
19AS680
4820-01-255-9040INTERCHANGEABLE
HEAD,VALVE
20561-1001-1
4820-01-256-0297INTERCHANGEABLE
STEM,FLUID VALVE
20561-1002-1
4820-01-256-0299INTERCHANGEABLE
CAP,VALVE
20561-801-1
4820-01-256-0309INTERCHANGEABLE
SLEEVE AND SLIDE,DIRECTIONAL CON
20561-850-1
4820-01-256-3658INTERCHANGEABLE
PISTON,VALVE
20561-1003-1
4820-01-256-9100INTERCHANGEABLE
CAP,VALVE
20561-1000-1

Frequently Asked Questions

What is NSN 5950-00-647-5299?

NSN 5950-00-647-5299 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 5950-00-647-5299?

NSN 5950-00-647-5299 has 2 cross-referenced part numbers: 20561 (Freed Transformer Co), 9P271DWGB25 (Cardwell Condenser Corp Lapointe-Admiral Div).

What NSN replaces 5950-00-647-5299?

There are 12 known substitutes for 5950-00-647-5299: 3110-00-107-7567, 5360-00-200-4118, 5945-00-407-7034 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20561?

Key specifications for 20561: Reliability Indicator: NOT ESTABLISHED; Thread Quantity Per Inch: 32 SINGLE GROUP; Winding Operating Voltage: 6.30 AC VOLTS NOMINAL SINGLE COMPONENT THIRD SECONDARY; Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT. 23 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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