PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FN189Transformer,power Autotransforme

Magnetika Inc · NSN 5950-00-900-5773 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-900-5773 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-900-5773. Primary manufacturer part number: FN189.
Features
  • Transformer,power Autotransforme — FSC 5950
  • Center to Center Distance Between Mounting Facilities Parallel to Length: 1.188 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
  • Center to Center Distance Between Mounting Facilities Parallel to Width: 1.188 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
  • Winding Function and Quantity: 1 PRIMARY, VARIABLE AUTOTRANSFORMER TYPE SINGLE COMPONENT
  • Mounting Method: THREADED STUD(S) SINGLE GROUP
  • Thread Quantity Per Inch: 32 SINGLE GROUP
  • Body Width: 1.625 INCHES NOMINAL IN
  • 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 Autotransforme, cataloged under National Stock Number 5950-00-900-5773, 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 Magnetika Inc. Government technical data includes 19 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-900-5773
Primary Part NumberFN189
Item NameTransformer,power Autotransforme
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerMagnetika Inc
StatusACTIVE
Center to Center Distance Between Mounting Facilities Parallel to Length1.188 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Center to Center Distance Between Mounting Facilities Parallel to Width1.188 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Winding Function and Quantity1 PRIMARY, VARIABLE AUTOTRANSFORMER TYPE SINGLE COMPONENT
Mounting MethodTHREADED STUD(S) SINGLE GROUP
Thread Quantity Per Inch32 SINGLE GROUP
Body Width1.625 INCHES NOMINAL IN
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Inclosure TypeHERMETICALLY SEALED
Terminal Type and Quantity16 WIRE HOOK
Frequency Rating400.0 HERTZ NOMINAL SINGLE COMPONENT
Winding Operating Voltage3.71 AC KILOVOLTS NOMINAL AND 7.43 AC KILOVOLTS NOMINAL AND 11.14 AC KILOVOLTS NOMINAL AND 14.85 AC KILOVOLTS NOMINAL AND 18.57 AC KILOVOLTS NOMINAL AND 22.28 AC KILOVOLTS NOMINAL AND 29.71 AC KILOVOLTS NOMINAL AND 37.14 AC KILOVOLTS NOMINAL AND 74.28 AC KILOVOLTS NOMINAL AND 148.50 AC KILOVOLTS NOMINAL AND 18.57 AC VOLTS NOMINAL AND 22.28 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Body Length1.625 INCHES NOMINAL IN
Winding Operating Current25.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY INPUT
Nominal Thread Size0.138 INCHES SINGLE GROUP IN
Winding Operating Voltage26.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY INPUT
Body Height2.375 INCHES NOMINAL IN
Reliability IndicatorNOT ESTABLISHED
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Mounting Facility Quantity4 SINGLE GROUP
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5905-00-731-57976096678-1 INTERCHANGEABLE
Resistor Network,fixed,film
Lockheed Martin Corporation Div Rotary and Mission Systems
Cross-Reference Index
Part NumberManufacturer
FN189 PRIMARY Magnetika Inc (USA)
FN189 United Transformer Corp Sub of Opt Industries Inc (USA)
Related Parts
5905-00-731-5797INTERCHANGEABLE
RESISTOR NETWORK,FIXED,FILM
6096678-1

Frequently Asked Questions

What is NSN 5950-00-900-5773?

NSN 5950-00-900-5773 is a Transformer,power Autotransforme, manufactured by Magnetika Inc, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-900-5773?

NSN 5950-00-900-5773 has 2 cross-referenced part numbers: FN189 (Magnetika Inc), FN189 (United Transformer Corp Sub of Opt Industries Inc).

What NSN replaces 5950-00-900-5773?

There is 1 known substitute for 5950-00-900-5773: 5905-00-731-5797. Verify interchangeability with system specifications before substitution.

What are the specifications of FN189?

Key specifications for FN189: Center to Center Distance Between Mounting Facilities Parallel to Length: 1.188 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN; Center to Center Distance Between Mounting Facilities Parallel to Width: 1.188 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN; Winding Function and Quantity: 1 PRIMARY, VARIABLE AUTOTRANSFORMER TYPE SINGLE COMPONENT; Mounting Method: THREADED STUD(S) SINGLE GROUP. 19 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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