PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4246Transformer,power

Berkshire Transformer · NSN 5950-00-879-3661 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-879-3661 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-879-3661. Primary manufacturer part number: 4246.
Features
  • Transformer,power — FSC 5950
  • Reliability Indicator: NOT ESTABLISHED
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
  • Center to Center Distance Between Mounting Facilities Parallel to Width: 1.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
  • Mounting Method: THREADED STUD(S) SINGLE GROUP
  • Terminal Type and Quantity: 4 SOLDER STUD
  • Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
  • Winding Operating Voltage: 115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-00-879-3661, 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 Berkshire Transformer. Government technical data includes 19 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-879-3661
Primary Part Number4246
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerBerkshire Transformer
StatusACTIVE
Reliability IndicatorNOT ESTABLISHED
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Center to Center Distance Between Mounting Facilities Parallel to Width1.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Mounting MethodTHREADED STUD(S) SINGLE GROUP
Terminal Type and Quantity4 SOLDER STUD
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Winding Operating Voltage115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Center to Center Distance Between Mounting Facilities Parallel to Length1.375 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Winding Operating Current200.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
Body Length1.938 INCHES NOMINAL IN
Winding Operating Voltage34.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Inclosure TypeFULLY INCLOSED
Thread Quantity Per Inch32 SINGLE GROUP
Mounting Facility Quantity4 SINGLE GROUP
Body Width1.812 INCHES NOMINAL IN
Frequency Rating50.0 HERTZ NOMINAL OR 60.0 HERTZ NOMINAL SINGLE COMPONENT
Nominal Thread Size0.138 INCHES SINGLE GROUP IN
Body Height2.438 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5999-00-113-2627 INTERCHANGEABLE
Contact,electrical
4730-00-144-5195 INTERCHANGEABLE
Nozzle,spray,fluid-Emulsion
5310-00-167-1374 INTERCHANGEABLE
Nut,plain,hexagon
4540-00-421-9582711XJ0870 INTERCHANGEABLE
Heating Element
Indeeco Llc Dba Indeeco
5970-00-433-08678883 INTERCHANGEABLE
Insulator,bushing
Halsit Holdings Llc Div Halsit Holdings, Llc Dba Abbatron
5995-00-456-77568883 INTERCHANGEABLE
Cable Assembly,radio Frequency
Times Microwave Systems, Inc Dba Times Microwave Systems Inc Div Times Microwave Systems
5342-00-460-3367 INTERCHANGEABLE
Clevis,thimble
5940-00-503-85358883 INTERCHANGEABLE
Terminal Board
Lucent Technologies Inc Corporate Headquarters
6510-01-181-8689 INTERCHANGEABLE
Sponge,surgical
6515-01-264-99574246-2 INTERCHANGEABLE
Syringe,hypodermic
Smiths Medical Asd Inc Dba Smiths Medical Asd, Inc
Cross-Reference Index
Part NumberManufacturer
4246 Berkshire Transformer (USA)
8883 Dne Technologies, Inc (USA)
Related Parts
5999-00-113-2627INTERCHANGEABLE
CONTACT,ELECTRICAL
4730-00-144-5195INTERCHANGEABLE
NOZZLE,SPRAY,FLUID-EMULSION
5310-00-167-1374INTERCHANGEABLE
NUT,PLAIN,HEXAGON
4540-00-421-9582INTERCHANGEABLE
HEATING ELEMENT
711XJ0870
5970-00-433-0867INTERCHANGEABLE
INSULATOR,BUSHING
8883
5995-00-456-7756INTERCHANGEABLE
CABLE ASSEMBLY,RADIO FREQUENCY
8883
5342-00-460-3367INTERCHANGEABLE
CLEVIS,THIMBLE
5940-00-503-8535INTERCHANGEABLE
TERMINAL BOARD
8883
6510-01-181-8689INTERCHANGEABLE
SPONGE,SURGICAL
6515-01-264-9957INTERCHANGEABLE
SYRINGE,HYPODERMIC
4246-2
4820-01-291-1544INTERCHANGEABLE
VALVE,GATE
8883
4820-01-294-1788INTERCHANGEABLE
SEAT,VALVE
8883 ITEM 5 20IN

Frequently Asked Questions

What is NSN 5950-00-879-3661?

NSN 5950-00-879-3661 is a Transformer,power, manufactured by Berkshire Transformer, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-879-3661?

NSN 5950-00-879-3661 has 2 cross-referenced part numbers: 4246 (Berkshire Transformer), 8883 (Dne Technologies, Inc).

What NSN replaces 5950-00-879-3661?

There are 12 known substitutes for 5950-00-879-3661: 5999-00-113-2627, 4730-00-144-5195, 5310-00-167-1374 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4246?

Key specifications for 4246: Reliability Indicator: NOT ESTABLISHED; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP; Center to Center Distance Between Mounting Facilities Parallel to Width: 1.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN; Mounting Method: THREADED STUD(S) SINGLE GROUP. 20 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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