PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ST5M1225-001Transformer,power Autotransforme

The Boeing Company Div Defense · NSN 5950-00-333-1173 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-333-1173 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-333-1173. Primary manufacturer part number: ST5M1225-001.
Features
  • Transformer,power Autotransforme — FSC 5950
  • Mounting Method: THREADED BUSHING SINGLE GROUP
  • Body Length: 4.250 INCHES MAXIMUM IN
  • Winding Operating Voltage: 0.00 AC VOLTS MINIMUM AND 27.50 AC VOLTS MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
  • Reliability Indicator: NOT ESTABLISHED
  • Body Outside Diameter: 2.050 INCHES MAXIMUM IN
  • Winding Operating Voltage: 115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY INPUT
  • Terminal Type and Quantity: 3 THREADED STUD
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power Autotransforme, cataloged under National Stock Number 5950-00-333-1173, 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 The Boeing Company Div Defense. Government technical data includes 14 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-333-1173
Primary Part NumberST5M1225-001
Item NameTransformer,power Autotransforme
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerThe Boeing Company Div Defense
StatusACTIVE
Mounting MethodTHREADED BUSHING SINGLE GROUP
Body Length4.250 INCHES MAXIMUM IN
Winding Operating Voltage0.00 AC VOLTS MINIMUM AND 27.50 AC VOLTS MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Reliability IndicatorNOT ESTABLISHED
Body Outside Diameter2.050 INCHES MAXIMUM IN
Winding Operating Voltage115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY INPUT
Terminal Type and Quantity3 THREADED STUD
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Inclosure TypeFULLY INCLOSED
Thread Series DesignatorUNEF SINGLE GROUP
Winding Operating Current5.0 AMPERES AC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Nominal Thread Size0.375 INCHES SINGLE GROUP IN
Frequency Rating400.0 HERTZ NOMINAL SINGLE COMPONENT
Winding Function and Quantity1 PRIMARY, VARIABLE AUTOTRANSFORMER TYPE SINGLE COMPONENT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
1650-00-140-181026449 INTERCHANGEABLE
Filter,fluid
Hamilton Sundstrand Corporation Dba Collins Aerospace
5950-00-707-1382 INTERCHANGEABLE
Transformer,power
5330-00-844-950426449 INTERCHANGEABLE
Gasket
Stewart & Stevenson Power Products Llc
Cross-Reference Index
Part NumberManufacturer
26449 Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems (USA)
ST5M1225-001 PRIMARY The Boeing Company Div Defense (USA)
Related Parts
1650-00-140-1810INTERCHANGEABLE
FILTER,FLUID
26449
5950-00-707-1382INTERCHANGEABLE
TRANSFORMER,POWER
5330-00-844-9504INTERCHANGEABLE
GASKET
26449

Frequently Asked Questions

What is NSN 5950-00-333-1173?

NSN 5950-00-333-1173 is a Transformer,power Autotransforme, manufactured by The Boeing Company Div Defense, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-333-1173?

NSN 5950-00-333-1173 has 2 cross-referenced part numbers: 26449 (Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems), ST5M1225-001 (The Boeing Company Div Defense).

What NSN replaces 5950-00-333-1173?

There are 3 known substitutes for 5950-00-333-1173: 1650-00-140-1810, 5950-00-707-1382, 5330-00-844-9504. Verify interchangeability with system specifications before substitution.

What are the specifications of ST5M1225-001?

Key specifications for ST5M1225-001: Mounting Method: THREADED BUSHING SINGLE GROUP; Body Length: 4.250 INCHES MAXIMUM IN; Winding Operating Voltage: 0.00 AC VOLTS MINIMUM AND 27.50 AC VOLTS MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT; Reliability Indicator: NOT ESTABLISHED. 14 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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