PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

501BTransformer,power Autotransforme

Staco Energy Products Co Dba Staco Energy Products Co · NSN 5950-00-087-0431 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-087-0431 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-087-0431. Primary manufacturer part number: 501B.
Features
  • Transformer,power Autotransforme — FSC 5950
  • Body Width: 4.813 INCHES NOMINAL IN
  • Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
  • Winding Operating Voltage: 120.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY INPUT
  • Reliability Indicator: NOT ESTABLISHED
  • Thread Quantity Per Inch: 20 SINGLE GROUP
  • Mounting Facility Quantity: 8 SINGLE GROUP
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power Autotransforme, cataloged under National Stock Number 5950-00-087-0431, 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 Staco Energy Products Co Dba Staco Energy Products Co. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5950-00-087-0431
Primary Part Number501B
Item NameTransformer,power Autotransforme
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerStaco Energy Products Co Dba Staco Energy Products Co
StatusCANCELLED
Body Width4.813 INCHES NOMINAL IN
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Winding Operating Voltage120.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY INPUT
Reliability IndicatorNOT ESTABLISHED
Thread Quantity Per Inch20 SINGLE GROUP
Mounting Facility Quantity8 SINGLE GROUP
Nominal Thread Size0.250 INCHES SINGLE GROUP IN
Winding Operating Voltage120.00 AC VOLTS MINIMUM AND 140.00 AC VOLTS MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Body Length4.156 INCHES NOMINAL IN
Mounting MethodTHREADED HOLE(S) SINGLE GROUP
Winding Function and Quantity1 PRIMARY, VARIABLE AUTOTRANSFORMER TYPE SINGLE COMPONENT
Inclosure TypePARTIALLY INCLOSED, HALF SHELL
Winding Operating Current3.5 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Frequency Rating50.0 HERTZ NOMINAL SINGLE COMPONENT
Body Height4.813 INCHES NOMINAL IN
Terminal Type and Quantity3 TAB, SOLDER LUG
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
5961-00-061-4588501 INTERCHANGEABLE
Holder,semiconductor Device
Narda Holdings, Inc. Dba Narda-Miteq Div Narda-Miteq
2530-00-392-4783501B INTERCHANGEABLE
Cylinder Assembly,hydraulic Brak
Zf Off-Highway Solutions Minnesota Inc
6685-00-901-3745VT4 INTERCHANGEABLE
Gage,vacuum,indicating
Teledyne Instruments, Inc. Dba Teledyne Hastings Instruments Div Teledyne Hastings Instruments
6625-00-948-3011 INTERCHANGEABLE
Voltmeter
5950-00-962-7312 INTERCHANGEABLE
Transformer,power Autotransforme
6130-01-141-8176501C INTERCHANGEABLE
Power Supply
Ametek Programmable Power, Inc.
6130-01-253-6767501B INTERCHANGEABLE
Power Supply
Ametek Programmable Power, Inc.
5365-01-288-1301 INTERCHANGEABLE
Shim
Cross-Reference Index
Part NumberManufacturer
501B Staco Energy Products Co Dba Staco Energy Products Co (USA)
501C Staco Energy Products Co Dba Staco Energy Products Co (USA)
2230002023 Stellant Pst Corp. Dba Stellant Pst Corp. (USA)
VT4 Ohmite Holding, L.l.c. Dba Ohmite Manufacturing (USA)
Related Parts
5961-00-061-4588INTERCHANGEABLE
HOLDER,SEMICONDUCTOR DEVICE
501
2530-00-392-4783INTERCHANGEABLE
CYLINDER ASSEMBLY,HYDRAULIC BRAK
501B
6685-00-901-3745INTERCHANGEABLE
GAGE,VACUUM,INDICATING
VT4
6625-00-948-3011INTERCHANGEABLE
VOLTMETER
5950-00-962-7312INTERCHANGEABLE
TRANSFORMER,POWER AUTOTRANSFORME
6130-01-141-8176INTERCHANGEABLE
POWER SUPPLY
501C
6130-01-253-6767INTERCHANGEABLE
POWER SUPPLY
501B
5365-01-288-1301INTERCHANGEABLE
SHIM

Frequently Asked Questions

What is NSN 5950-00-087-0431?

NSN 5950-00-087-0431 is a Transformer,power Autotransforme, manufactured by Staco Energy Products Co Dba Staco Energy Products Co, classified under FSC 5950 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5950-00-087-0431?

NSN 5950-00-087-0431 has 4 cross-referenced part numbers: 501B (Staco Energy Products Co Dba Staco Energy Products Co), 501C (Staco Energy Products Co Dba Staco Energy Products Co), 2230002023 (Stellant Pst Corp. Dba Stellant Pst Corp.), VT4 (Ohmite Holding, L.l.c. Dba Ohmite Manufacturing).

What NSN replaces 5950-00-087-0431?

There are 8 known substitutes for 5950-00-087-0431: 5961-00-061-4588, 2530-00-392-4783, 6685-00-901-3745 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 501B?

Key specifications for 501B: Body Width: 4.813 INCHES NOMINAL IN; Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP; Winding Operating Voltage: 120.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY INPUT. 17 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5950-00-087-0431 still in active supply?

NSN 5950-00-087-0431 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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