PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20021Transformer,audio Frequency

Freed Transformer Co · NSN 5950-00-647-7054 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-647-7054 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-647-7054. Primary manufacturer part number: 20021.
Features
  • Transformer,audio Frequency — FSC 5950
  • Primary to Secondary Turn Ratio: 1 TO 6-4/10 SINGLE COMPONENT
  • Reliability Indicator: NOT ESTABLISHED
  • Terminal Type and Quantity: 4 STANDOFF, SOLDER LUG
  • Body Height: 3.281 INCHES MAXIMUM IN
  • Impedance Rating in Ohms: 100.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY
  • Mounting Facility Quantity: 4 SINGLE GROUP
  • Center to Center Distance Between Mounting Facilities Parallel to Width: 1.500 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,audio Frequency, cataloged under National Stock Number 5950-00-647-7054, 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 20 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
NSN5950-00-647-7054
Primary Part Number20021
Item NameTransformer,audio Frequency
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerFreed Transformer Co
StatusACTIVE
Primary to Secondary Turn Ratio1 TO 6-4/10 SINGLE COMPONENT
Reliability IndicatorNOT ESTABLISHED
Terminal Type and Quantity4 STANDOFF, SOLDER LUG
Body Height3.281 INCHES MAXIMUM IN
Impedance Rating in Ohms100.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Mounting Facility Quantity4 SINGLE GROUP
Center to Center Distance Between Mounting Facilities Parallel to Width1.500 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Thread Quantity Per Inch32 SINGLE GROUP
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Mounting MethodTHREADED STUD(S) SINGLE GROUP
Inclosure TypeHERMETICALLY SEALED
Center to Center Distance Between Mounting Facilities Parallel to Length1.625 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Body Length2.250 INCHES MAXIMUM IN
Frequency Rating50.0 HERTZ MINIMUM AND 1.55 KILOHERTZ MAXIMUM SINGLE COMPONENT
Nominal Thread Size0.164 INCHES SINGLE GROUP IN
Body Width2.125 INCHES MAXIMUM IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Winding Operating Current65.0 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY
Impedance Rating in Ohms4000.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Maximum Transformer Power Rating3.0 DECIBELS SINGLE COMPONENT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5133-00-234-5141 INTERCHANGEABLE
Drill,twist
3120-00-247-4817 INTERCHANGEABLE
Bearing,washer,thrust
5960-00-270-33267583084 INTERCHANGEABLE
Retainer,electron Tube
Us Army Aviation and Missile Command
5910-00-280-761120021 INTERCHANGEABLE
Capacitor,fixed,paper Dielectric
Cd Snow Hill, Llc
5920-00-280-8342 INTERCHANGEABLE
Fuse,cartridge
5360-00-498-068620021 INTERCHANGEABLE
Spring,helical,compression
Circor Aerospace, Inc. Dba Circor Aerospace Inc
3020-00-938-897254A50B194 INTERCHANGEABLE
Pulley,container
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
3040-01-091-38452002-1 INTERCHANGEABLE
Connecting Link,rigid
Tyee Aircraft Inc Div Tyee Aircraft
4820-01-120-0485 INTERCHANGEABLE
Bonnet,valve
2910-01-245-390320021 INTERCHANGEABLE
Cylinder,quick Start
Kold-Ban International Ltd Div Kbi
Cross-Reference Index
Part NumberManufacturer
20021 PRIMARY Freed Transformer Co (USA)
06703REVG PRIMARY L3harris Technologies, Inc. Div Space and Airborne Systems (USA)
Related Parts
5133-00-234-5141INTERCHANGEABLE
DRILL,TWIST
3120-00-247-4817INTERCHANGEABLE
BEARING,WASHER,THRUST
5960-00-270-3326INTERCHANGEABLE
RETAINER,ELECTRON TUBE
7583084
5910-00-280-7611INTERCHANGEABLE
CAPACITOR,FIXED,PAPER DIELECTRIC
20021
5920-00-280-8342INTERCHANGEABLE
FUSE,CARTRIDGE
5360-00-498-0686INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
20021
3020-00-938-8972INTERCHANGEABLE
PULLEY,CONTAINER
54A50B194
3040-01-091-3845INTERCHANGEABLE
CONNECTING LINK,RIGID
2002-1
4820-01-120-0485INTERCHANGEABLE
BONNET,VALVE
2910-01-245-3903INTERCHANGEABLE
CYLINDER,QUICK START
20021
5330-01-273-9966INTERCHANGEABLE
GASKET
20021
2540-01-560-2062INTERCHANGEABLE
CONTROL BOX,ELECTRICAL,VEHICULAR
6031580

Frequently Asked Questions

What is NSN 5950-00-647-7054?

NSN 5950-00-647-7054 is a Transformer,audio Frequency, manufactured by Freed Transformer Co, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-647-7054?

NSN 5950-00-647-7054 has 2 cross-referenced part numbers: 20021 (Freed Transformer Co), 06703REVG (L3harris Technologies, Inc. Div Space and Airborne Systems).

What NSN replaces 5950-00-647-7054?

There are 12 known substitutes for 5950-00-647-7054: 5133-00-234-5141, 3120-00-247-4817, 5960-00-270-3326 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20021?

Key specifications for 20021: Primary to Secondary Turn Ratio: 1 TO 6-4/10 SINGLE COMPONENT; Reliability Indicator: NOT ESTABLISHED; Terminal Type and Quantity: 4 STANDOFF, SOLDER LUG; Body Height: 3.281 INCHES MAXIMUM 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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