PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1020241Transformer,power

Lockheed Martin Corporation Div Rms - Mitchel Field · NSN 5950-00-856-1227 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-856-1227 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-856-1227. Primary manufacturer part number: 1020241.
Features
  • Transformer,power — FSC 5950
  • Terminal Type and Quantity: 21 SOLDER STUD
  • Reliability Indicator: NOT ESTABLISHED
  • Frequency Rating: 400.0 HERTZ NOMINAL SINGLE COMPONENT
  • Body Height: 4.375 INCHES NOMINAL IN
  • Winding Operating Voltage: 123.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY
  • Thread Quantity Per Inch: 32 SINGLE GROUP
  • Winding Operating Voltage: 212.00 AC VOLTS NOMINAL SINGLE COMPONENT THIRD SECONDARY
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-00-856-1227, 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 Lockheed Martin Corporation Div Rms - Mitchel Field. Government technical data includes 23 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-856-1227
Primary Part Number1020241
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerLockheed Martin Corporation Div Rms - Mitchel Field
StatusACTIVE
Terminal Type and Quantity21 SOLDER STUD
Reliability IndicatorNOT ESTABLISHED
Frequency Rating400.0 HERTZ NOMINAL SINGLE COMPONENT
Body Height4.375 INCHES NOMINAL IN
Winding Operating Voltage123.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY
Thread Quantity Per Inch32 SINGLE GROUP
Winding Operating Voltage212.00 AC VOLTS NOMINAL SINGLE COMPONENT THIRD SECONDARY
Inclosure TypeFULLY INCLOSED
Body Length4.594 INCHES NOMINAL IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Mounting MethodTHREADED HOLE(S) SINGLE GROUP
Center to Center Distance Between Mounting Facilities Parallel to Length1.625 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Winding Function and Quantity1 PRIMARY AND 3 SECONDARY SINGLE COMPONENT
Input-Output Phase RelationshipTHREE PHASE TO THREE PHASE SINGLE COMPONENT
Nominal Thread Size0.138 INCHES SINGLE GROUP IN
Winding Operating Current300.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
Winding Operating Current850.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT THIRD SECONDARY
Winding Operating Current250.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
Center to Center Distance Between Mounting Facilities Parallel to Width2.688 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Winding Operating Voltage110.00 AC VOLTS NOMINAL AND 115.00 AC VOLTS NOMINAL AND 119.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Mounting Facility Quantity4 SINGLE GROUP
Winding Operating Voltage121.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
Body Width2.719 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
3020-00-143-5414 INTERCHANGEABLE
Gear,magneto-Drive
5905-00-435-1718 INTERCHANGEABLE
Resistor,fixed,composition
Cross-Reference Index
Part NumberManufacturer
436671 Lockheed Martin Corporation Div Rms - Mitchel Field (USA)
W14086 Unisys Corp Systems Development (USA)
2003064 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
1020241 PRIMARY Lockheed Martin Corporation Div Rms - Mitchel Field (USA)
Related Parts
3020-00-143-5414INTERCHANGEABLE
GEAR,MAGNETO-DRIVE
5905-00-435-1718INTERCHANGEABLE
RESISTOR,FIXED,COMPOSITION

Frequently Asked Questions

What is NSN 5950-00-856-1227?

NSN 5950-00-856-1227 is a Transformer,power, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-856-1227?

NSN 5950-00-856-1227 has 4 cross-referenced part numbers: 436671 (Lockheed Martin Corporation Div Rms - Mitchel Field), W14086 (Unisys Corp Systems Development), 2003064 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 1020241 (Lockheed Martin Corporation Div Rms - Mitchel Field).

What NSN replaces 5950-00-856-1227?

There are 2 known substitutes for 5950-00-856-1227: 3020-00-143-5414, 5905-00-435-1718. Verify interchangeability with system specifications before substitution.

What are the specifications of 1020241?

Key specifications for 1020241: Terminal Type and Quantity: 21 SOLDER STUD; Reliability Indicator: NOT ESTABLISHED; Frequency Rating: 400.0 HERTZ NOMINAL SINGLE COMPONENT; Body Height: 4.375 INCHES NOMINAL IN. 23 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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