PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21-0ALT3Transformer,power Autotransforme

The Dewey Electronics Corporation Div Pitometer Log Division · NSN 5950-00-250-1708 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-250-1708 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-250-1708. Primary manufacturer part number: 21-0ALT3.
Features
  • Transformer,power Autotransforme — FSC 5950
  • Body Width: 6.250 INCHES NOMINAL IN
  • Mounting Facility Quantity: 4 SINGLE GROUP
  • Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
  • Winding Operating Voltage: 115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY INPUT
  • Body Height: 6.125 INCHES NOMINAL IN
  • Winding Power Rating: 370.0 VOLTS-AMPERES SINGLE COMPONENT SINGLE PRIMARY OUTPUT
  • Winding Operating Voltage: 0.00 AC VOLTS MINIMUM AND 185.00 AC VOLTS MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power Autotransforme, cataloged under National Stock Number 5950-00-250-1708, 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 Dewey Electronics Corporation Div Pitometer Log Division. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5950-00-250-1708
Primary Part Number21-0ALT3
Item NameTransformer,power Autotransforme
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerThe Dewey Electronics Corporation Div Pitometer Log Division
StatusCANCELLED
Body Width6.250 INCHES NOMINAL IN
Mounting Facility Quantity4 SINGLE GROUP
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Winding Operating Voltage115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY INPUT
Body Height6.125 INCHES NOMINAL IN
Winding Power Rating370.0 VOLTS-AMPERES SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Winding Operating Voltage0.00 AC VOLTS MINIMUM AND 185.00 AC VOLTS MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Winding Function and Quantity1 PRIMARY, VARIABLE AUTOTRANSFORMER TYPE SINGLE COMPONENT
Inclosure TypePARTIALLY INCLOSED, HALF SHELL
Center to Center Distance Between Mounting Facilities Parallel to Width1.500 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Center to Center Distance Between Mounting Facilities Parallel to Length4.625 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Frequency Rating60.0 HERTZ NOMINAL SINGLE COMPONENT
Reliability IndicatorNOT ESTABLISHED
Mounting MethodFLANGE AND UNTHREADED HOLE(S) SINGLE GROUP
Body Length6.500 INCHES NOMINAL IN
Winding Operating Current2.0 AMPERES AC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Terminal Type and Quantity3 THREADED STUD
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
2815-00-064-788829128 INTERCHANGEABLE
Cylinder Head,diesel Engine
Napco International Llc Dba Napco International Inc
5365-00-134-816402 09129 INTERCHANGEABLE
Ring,press
Pellerin Milnor Corporation
5915-00-376-9009HE1-3115 INTERCHANGEABLE
Filter,radio Frequency Interfere
Lcr Electronics, Inc Div Lcr Electronics, Inc. Dba Astrodyne Tdi Emi Filters Bu
5815-00-602-7073 INTERCHANGEABLE
Advance Prevent Lev
6145-00-682-3455 INTERCHANGEABLE
Cable,special Purpose,electrical
1670-00-714-0306 INTERCHANGEABLE
Canopy,parachute,aircraft Decele
5950-00-727-07531393 INTERCHANGEABLE
Transformer,power
Precision Electronics, Inc
4730-00-928-4486 INTERCHANGEABLE
Trap,drainage Pipe
5910-01-036-0885511D227M035CD4D INTERCHANGEABLE
Capacitor,fixed,electrolytic
United Chemi-Con Mfg Inc
5995-01-100-07271393 INTERCHANGEABLE
Cable Assembly,power,electrical
Leidos, Inc. Div Cyber and Information Solutions Services
Cross-Reference Index
Part NumberManufacturer
1393 Gettysburg Engineering Co Inc (USA)
21-0ALT3 PRIMARY The Dewey Electronics Corporation Div Pitometer Log Division (USA)
29129 Standard Electronics Corp (USA)
Related Parts
2815-00-064-7888INTERCHANGEABLE
CYLINDER HEAD,DIESEL ENGINE
29128
5365-00-134-8164INTERCHANGEABLE
RING,PRESS
02 09129
5915-00-376-9009INTERCHANGEABLE
FILTER,RADIO FREQUENCY INTERFERE
HE1-3115
5815-00-602-7073INTERCHANGEABLE
ADVANCE PREVENT LEV
6145-00-682-3455INTERCHANGEABLE
CABLE,SPECIAL PURPOSE,ELECTRICAL
1670-00-714-0306INTERCHANGEABLE
CANOPY,PARACHUTE,AIRCRAFT DECELE
5950-00-727-0753INTERCHANGEABLE
TRANSFORMER,POWER
1393
4730-00-928-4486INTERCHANGEABLE
TRAP,DRAINAGE PIPE
5910-01-036-0885INTERCHANGEABLE
CAPACITOR,FIXED,ELECTROLYTIC
511D227M035CD4D
5995-01-100-0727INTERCHANGEABLE
CABLE ASSEMBLY,POWER,ELECTRICAL
1393
5340-01-133-0631INTERCHANGEABLE
DOORSTOP
139-3
4210-01-176-0566INTERCHANGEABLE
STEM ASSEMBLY,VALVE
06093-P

Frequently Asked Questions

What is NSN 5950-00-250-1708?

NSN 5950-00-250-1708 is a Transformer,power Autotransforme, manufactured by The Dewey Electronics Corporation Div Pitometer Log Division, classified under FSC 5950 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5950-00-250-1708?

NSN 5950-00-250-1708 has 3 cross-referenced part numbers: 1393 (Gettysburg Engineering Co Inc), 21-0ALT3 (The Dewey Electronics Corporation Div Pitometer Log Division), 29129 (Standard Electronics Corp).

What NSN replaces 5950-00-250-1708?

There are 12 known substitutes for 5950-00-250-1708: 2815-00-064-7888, 5365-00-134-8164, 5915-00-376-9009 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21-0ALT3?

Key specifications for 21-0ALT3: Body Width: 6.250 INCHES NOMINAL IN; Mounting Facility Quantity: 4 SINGLE GROUP; Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT; Winding Operating Voltage: 115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY INPUT. 17 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5950-00-250-1708 still in active supply?

NSN 5950-00-250-1708 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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