PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

221-001-155Transformer,power

Power Paragon, Inc. Dba Power Magnetics Div Power Magnetics · NSN 5950-00-973-2112 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-973-2112 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-973-2112. Primary manufacturer part number: 221-001-155.
Features
  • Transformer,power — FSC 5950
  • Criticality Code Justification: FEAT
  • Mounting Method: UNTHREADED HOLE(S) SINGLE GROUP
  • Frequency Rating: 400.0 HERTZ NOMINAL SINGLE COMPONENT
  • Winding Operating Voltage: 120.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
  • Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
  • Maximum Transformer Power Rating: 25.0 KILOVOLT-AMPERE SINGLE COMPONENT
  • Cooling Method: SELF-COOLED
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-00-973-2112, 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 Power Paragon, Inc. Dba Power Magnetics Div Power Magnetics. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 9 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
NSN5950-00-973-2112
Primary Part Number221-001-155
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerPower Paragon, Inc. Dba Power Magnetics Div Power Magnetics
StatusCANCELLED
Criticality Code JustificationFEAT
Mounting MethodUNTHREADED HOLE(S) SINGLE GROUP
Frequency Rating400.0 HERTZ NOMINAL SINGLE COMPONENT
Winding Operating Voltage120.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Maximum Transformer Power Rating25.0 KILOVOLT-AMPERE SINGLE COMPONENT
Cooling MethodSELF-COOLED
Distance Between Mounting Facility Centers7.400 INCHES NOMINAL AND 10.020 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Body Length12.620 INCHES NOMINAL IN
Body Width10.500 INCHES NOMINAL IN
Mounting Hole Diameter0.434 INCHES NOMINAL SINGLE GROUP IN
Winding Operating Voltage450.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Terminal Type and Quantity4 WIRE LEAD
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Body Height20.560 INCHES NOMINAL IN
Reliability IndicatorNOT ESTABLISHED
Inclosure TypeFULLY INCLOSED
Mounting Facility Quantity4 SINGLE GROUP
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5950-00-081-0461 INTERCHANGEABLE
Transformer,power
6605-00-086-752710-1812 INTERCHANGEABLE
Indicator,gyro
L3 Technologies, Inc.
5950-00-262-2249 INTERCHANGEABLE
Transformer,power
5950-00-548-047178J465 INTERCHANGEABLE
Transformer,power
Westinghouse Electric Corp Medium Power Transformer Div
5950-00-678-4045 INTERCHANGEABLE
Transformer,power
5950-00-683-0510 INTERCHANGEABLE
Transformer,power
5950-00-688-6355S230A614G04 INTERCHANGEABLE
Transformer,power
Westinghouse Electric Corp
5950-00-892-8861 INTERCHANGEABLE
Transformer,power
5340-00-980-73511018-12 INTERCHANGEABLE
Handle,bow
Sensor Systems, L.l.c. Dba Sensor Systems Llc
5950-01-142-5372 INTERCHANGEABLE
Transformer,power
Cross-Reference Index
Part NumberManufacturer
9T11Y5535 Bae Systems Information and Electronic Systems Integration Inc. (USA)
S230A613G01 Westinghouse Electric Corp Control Business Unit
221-001-155 Jefferson Electric Inc Div of Magnetek Inc (USA)
MILT17221TYPESD Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
W8118388AA General Electric Co Switchgear and Control Division of Apparatus Group (USA)
221-001-155 PRIMARY Power Paragon, Inc. Dba Power Magnetics Div Power Magnetics (USA)
MILT17221 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
10181-2 Square D Co Electromagnetic Industries Div (USA)
221-001-155 Sherjor Inc (USA)
10181-2 Square D Co Pinellas Plant (USA)
Related Parts
5950-00-081-0461INTERCHANGEABLE
TRANSFORMER,POWER
6605-00-086-7527INTERCHANGEABLE
INDICATOR,GYRO
10-1812
5950-00-262-2249INTERCHANGEABLE
TRANSFORMER,POWER
5950-00-548-0471INTERCHANGEABLE
TRANSFORMER,POWER
78J465
5950-00-678-4045INTERCHANGEABLE
TRANSFORMER,POWER
5950-00-683-0510INTERCHANGEABLE
TRANSFORMER,POWER
5950-00-688-6355INTERCHANGEABLE
TRANSFORMER,POWER
S230A614G04
5950-00-892-8861INTERCHANGEABLE
TRANSFORMER,POWER
5340-00-980-7351INTERCHANGEABLE
HANDLE,BOW
1018-12
5950-01-142-5372INTERCHANGEABLE
TRANSFORMER,POWER
6515-01-162-2988INTERCHANGEABLE
PLATE,PRESSURE,W
101-812
5950-01-200-2783INTERCHANGEABLE
TRANSFORMER,POWER

Frequently Asked Questions

What is NSN 5950-00-973-2112?

NSN 5950-00-973-2112 is a Transformer,power, manufactured by Power Paragon, Inc. Dba Power Magnetics Div Power Magnetics, classified under FSC 5950 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5950-00-973-2112?

NSN 5950-00-973-2112 has 10 cross-referenced part numbers: 9T11Y5535 (Bae Systems Information and Electronic Systems Integration Inc.), S230A613G01 (Westinghouse Electric Corp Control Business Unit), 221-001-155 (Jefferson Electric Inc Div of Magnetek Inc), MILT17221TYPESD (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), W8118388AA (General Electric Co Switchgear and Control Division of Apparatus Group) and 5 more.

What NSN replaces 5950-00-973-2112?

There are 12 known substitutes for 5950-00-973-2112: 5950-00-081-0461, 6605-00-086-7527, 5950-00-262-2249 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 221-001-155?

Key specifications for 221-001-155: Special Features: WEAPON SYSTEM ESSENTIAL; Criticality Code Justification: FEAT; Mounting Method: UNTHREADED HOLE(S) SINGLE GROUP; Frequency Rating: 400.0 HERTZ NOMINAL SINGLE COMPONENT. 20 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5950-00-973-2112 still in active supply?

NSN 5950-00-973-2112 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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