PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

6401Transformer,power Autotransforme

Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems · NSN 5950-00-553-7228 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-553-7228 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-553-7228. Primary manufacturer part number: 6401.
Features
  • Transformer,power Autotransforme — FSC 5950
  • Winding Power Rating: 56.0 VOLTS-AMPERES SINGLE COMPONENT SINGLE PRIMARY INPUT
  • Winding Operating Voltage: 28.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY INPUT
  • Body Outside Diameter: 2.000 INCHES NOMINAL IN
  • Adjustment Method and Quantity: 1 ADJUSTABLE CONTROL SINGLE COMPONENT
  • Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
  • Frequency Rating: 380.0 HERTZ MINIMUM AND 440.0 HERTZ MAXIMUM SINGLE COMPONENT
  • Body Length: 1.820 INCHES NOMINAL IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power Autotransforme, cataloged under National Stock Number 5950-00-553-7228, 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 Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems. Government technical data includes 18 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
NSN5950-00-553-7228
Primary Part Number6401
Item NameTransformer,power Autotransforme
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerOeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems
StatusACTIVE
Winding Power Rating56.0 VOLTS-AMPERES SINGLE COMPONENT SINGLE PRIMARY INPUT
Winding Operating Voltage28.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY INPUT
Body Outside Diameter2.000 INCHES NOMINAL IN
Adjustment Method and Quantity1 ADJUSTABLE CONTROL SINGLE COMPONENT
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Frequency Rating380.0 HERTZ MINIMUM AND 440.0 HERTZ MAXIMUM SINGLE COMPONENT
Body Length1.820 INCHES NOMINAL IN
Winding Operating Current2.0 AMPERES AC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY INPUT
Nominal Thread Size0.375 INCHES SINGLE GROUP IN
Thread Quantity Per Inch32 SINGLE GROUP
Adjustment Device Drive TypeSHAFT SINGLE COMPONENT
Winding Operating Voltage0.00 AC VOLTS MINIMUM AND 28.00 AC VOLTS MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Thread Series DesignatorUNEF SINGLE GROUP
Mounting MethodTHREADED BUSHING SINGLE GROUP
Reliability IndicatorNOT ESTABLISHED
Winding Function and Quantity1 PRIMARY, VARIABLE AUTOTRANSFORMER TYPE SINGLE COMPONENT
Inclosure TypeFULLY INCLOSED
Terminal Type and Quantity3 THREADED STUD
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6625-00-025-4841 INTERCHANGEABLE
Analyzer,frequency Deviation
5940-00-110-1753 INTERCHANGEABLE
Terminal,lug
6685-00-148-8085251715-4 INTERCHANGEABLE
Controller,temperature
Raytheon Company Dba Raytheon
7510-00-149-0732SMA597833-3 INTERCHANGEABLE
Tape,pressure Sensitive Adhesive
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5945-00-238-5197 INTERCHANGEABLE
Relay,solid State
5915-00-496-20092920137-1 INTERCHANGEABLE
Filter,band Pass
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
6695-00-847-83186401 INTERCHANGEABLE
Calibration Set,primary Referenc
Druck, Llc Dba Druck, Llc
4820-00-954-85316401 INTERCHANGEABLE
Valve,linear,directional Control
Tactair Fluid Controls Inc
4240-00-994-66536401-00 INTERCHANGEABLE
Case,storage and Transport,breat
Avox Systems Inc Dba Avox Systems Inc
5305-01-061-83466401 INTERCHANGEABLE
Setscrew
Clayton Manufacturing Company
Cross-Reference Index
Part NumberManufacturer
10-3173-2 The Boeing Company Div Defense (USA)
6401 PRIMARY Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems (USA)
Related Parts
6625-00-025-4841INTERCHANGEABLE
ANALYZER,FREQUENCY DEVIATION
5940-00-110-1753INTERCHANGEABLE
TERMINAL,LUG
6685-00-148-8085INTERCHANGEABLE
CONTROLLER,TEMPERATURE
251715-4
7510-00-149-0732INTERCHANGEABLE
TAPE,PRESSURE SENSITIVE ADHESIVE
SMA597833-3
5945-00-238-5197INTERCHANGEABLE
RELAY,SOLID STATE
5915-00-496-2009INTERCHANGEABLE
FILTER,BAND PASS
2920137-1
6695-00-847-8318INTERCHANGEABLE
CALIBRATION SET,PRIMARY REFERENC
6401
4820-00-954-8531INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
6401
4240-00-994-6653INTERCHANGEABLE
CASE,STORAGE AND TRANSPORT,BREAT
6401-00
5305-01-061-8346INTERCHANGEABLE
SETSCREW
6401
6625-01-097-7435INTERCHANGEABLE
COUNTER,ELECTRONIC,DIGITAL READO
5307-01-127-1417INTERCHANGEABLE
STUD,PLAIN
6401

Frequently Asked Questions

What is NSN 5950-00-553-7228?

NSN 5950-00-553-7228 is a Transformer,power Autotransforme, manufactured by Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-553-7228?

NSN 5950-00-553-7228 has 2 cross-referenced part numbers: 10-3173-2 (The Boeing Company Div Defense), 6401 (Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems).

What NSN replaces 5950-00-553-7228?

There are 12 known substitutes for 5950-00-553-7228: 6625-00-025-4841, 5940-00-110-1753, 6685-00-148-8085 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 6401?

Key specifications for 6401: Winding Power Rating: 56.0 VOLTS-AMPERES SINGLE COMPONENT SINGLE PRIMARY INPUT; Winding Operating Voltage: 28.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY INPUT; Body Outside Diameter: 2.000 INCHES NOMINAL IN; Adjustment Method and Quantity: 1 ADJUSTABLE CONTROL SINGLE COMPONENT. 18 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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