PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18686Transformer,audio Frequency

Freed Transformer Co · NSN 5950-00-231-4454 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-231-4454 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-231-4454. Primary manufacturer part number: 18686.
Features
  • Transformer,audio Frequency — FSC 5950
  • Terminal Type and Quantity: 4 STANDOFF, SOLDER LUG
  • Center to Center Distance Between Mounting Facilities Parallel to Length: 0.969 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
  • Body Length: 1.250 INCHES NOMINAL IN
  • Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
  • Winding Operating Current: 10.0 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY
  • Frequency Rating: 800.0 HERTZ MINIMUM AND 10.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,audio Frequency, cataloged under National Stock Number 5950-00-231-4454, 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-231-4454
Primary Part Number18686
Item NameTransformer,audio Frequency
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerFreed Transformer Co
StatusACTIVE
Terminal Type and Quantity4 STANDOFF, SOLDER LUG
Center to Center Distance Between Mounting Facilities Parallel to Length0.969 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Body Length1.250 INCHES NOMINAL IN
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Winding Operating Current10.0 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY
Frequency Rating800.0 HERTZ MINIMUM AND 10.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
Reliability IndicatorNOT ESTABLISHED
Primary to Secondary Turn Ratio1 TO 4 SINGLE COMPONENT
Body Height2.500 INCHES NOMINAL IN
Thread Quantity Per Inch32 SINGLE GROUP
Center to Center Distance Between Mounting Facilities Parallel to Width0.969 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Mounting Facility Quantity4 SINGLE GROUP
Impedance Rating in Ohms10000.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Mounting MethodTHREADED HOLE(S) SINGLE GROUP
Body Width1.250 INCHES NOMINAL IN
Inclosure TypeFULLY INCLOSED
Nominal Thread Size0.138 INCHES SINGLE GROUP IN
Maximum Transformer Power Rating100.0 MILLIWATTS SINGLE COMPONENT
Impedance Rating in Ohms600.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5970-00-276-065018686 INTERCHANGEABLE
Insulation Sleeving,electrical
Parker-Hannifin Corporation Dba Pneutronics Div Parflex Division
6625-00-962-21797911118 INTERCHANGEABLE
Adapter,test
Us Army Aviation and Missile Command
6120-01-491-31435111T30P01 INTERCHANGEABLE
Transformer,power
General Electric Company Dba Ge Aerospace
5999-01-562-264718686 INTERCHANGEABLE
Connector,receptacl
Times Microwave Systems, Inc Dba Times Microwave Systems Inc Div Times Microwave Systems
Cross-Reference Index
Part NumberManufacturer
06017REVB L3harris Technologies, Inc. Div Space and Airborne Systems (USA)
18686 PRIMARY Freed Transformer Co (USA)
Related Parts
5970-00-276-0650INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
18686
6625-00-962-2179INTERCHANGEABLE
ADAPTER,TEST
7911118
6120-01-491-3143INTERCHANGEABLE
TRANSFORMER,POWER
5111T30P01
5999-01-562-2647INTERCHANGEABLE
CONNECTOR,RECEPTACL
18686

Frequently Asked Questions

What is NSN 5950-00-231-4454?

NSN 5950-00-231-4454 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 5950-00-231-4454?

NSN 5950-00-231-4454 has 2 cross-referenced part numbers: 06017REVB (L3harris Technologies, Inc. Div Space and Airborne Systems), 18686 (Freed Transformer Co).

What NSN replaces 5950-00-231-4454?

There are 4 known substitutes for 5950-00-231-4454: 5970-00-276-0650, 6625-00-962-2179, 6120-01-491-3143 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 18686?

Key specifications for 18686: Terminal Type and Quantity: 4 STANDOFF, SOLDER LUG; Center to Center Distance Between Mounting Facilities Parallel to Length: 0.969 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP; Body Length: 1.250 INCHES NOMINAL IN. 20 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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