PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

817287Transformer,power

Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier · NSN 5950-00-645-0971 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-645-0971 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-645-0971. Primary manufacturer part number: 817287.
Features
  • Transformer,power — FSC 5950
  • Inclosure Type: HERMETICALLY SEALED
  • Winding Operating Voltage: 115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
  • Winding Operating Current: 500.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
  • Winding Operating Voltage: 9.00 AC VOLTS NOMINAL AND 18.00 AC VOLTS NOMINAL AND 75.00 AC VOLTS NOMINAL SINGLE COMPONENT THIRD SECONDARY
  • Terminal Type and Quantity: 11 TAB, SOLDER LUG
  • Winding Operating Current: 2.0 AMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
  • Winding Operating Voltage: 6.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-00-645-0971, 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 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-645-0971
Primary Part Number817287
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerNavair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
StatusACTIVE
Inclosure TypeHERMETICALLY SEALED
Winding Operating Voltage115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Winding Operating Current500.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
Winding Operating Voltage9.00 AC VOLTS NOMINAL AND 18.00 AC VOLTS NOMINAL AND 75.00 AC VOLTS NOMINAL SINGLE COMPONENT THIRD SECONDARY
Terminal Type and Quantity11 TAB, SOLDER LUG
Winding Operating Current2.0 AMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
Winding Operating Voltage6.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
Body Width4.000 INCHES NOMINAL IN
Body Length4.500 INCHES NOMINAL IN
Frequency Rating60.0 HERTZ NOMINAL SINGLE COMPONENT
Mounting MethodUNTHREADED HOLE(S) SINGLE GROUP
Mounting Facility Quantity4 SINGLE GROUP
Center to Center Distance Between Mounting Facilities Parallel to Width2.500 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Winding Operating Current750.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT THIRD SECONDARY
Body Height3.500 INCHES NOMINAL IN
Mounting Hole Diameter0.220 INCHES NOMINAL SINGLE GROUP IN
Winding Function and Quantity1 PRIMARY AND 3 SECONDARY SINGLE COMPONENT
Winding Operating Voltage5.00 AC VOLTS NOMINAL AND 30.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Center to Center Distance Between Mounting Facilities Parallel to Length4.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Reliability IndicatorNOT ESTABLISHED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5950-00-085-0786 INTERCHANGEABLE
Reactor
5345-00-184-137461463686830 INTERCHANGEABLE
Stone,sharpening
Saint-Gobain Abrasives Inc
5935-00-280-2193 INTERCHANGEABLE
Clamp,cable,electrical Connector
6110-01-093-7400 INTERCHANGEABLE
Protector,thermal-Overload,elect
2920-01-277-163842862 INTERCHANGEABLE
Sensor Wheel,igniti
Brunswick Corp Dba Mercury Marine Div Mercury Marine
9905-01-699-377642862 INTERCHANGEABLE
Plate,instruction
Brady Corp Div Brady Worldwide
Cross-Reference Index
Part NumberManufacturer
4982 Transformer Engineers Co a Div of Standard Industries Inc (USA)
817287 Berkshire Transformer (USA)
42862 Coast/advanced Chip Magnetics, Inc. (USA)
817287 PRIMARY Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
Related Parts
5950-00-085-0786INTERCHANGEABLE
REACTOR
5345-00-184-1374INTERCHANGEABLE
STONE,SHARPENING
61463686830
5935-00-280-2193INTERCHANGEABLE
CLAMP,CABLE,ELECTRICAL CONNECTOR
6110-01-093-7400INTERCHANGEABLE
PROTECTOR,THERMAL-OVERLOAD,ELECT
2920-01-277-1638INTERCHANGEABLE
SENSOR WHEEL,IGNITI
42862
9905-01-699-3776INTERCHANGEABLE
PLATE,INSTRUCTION
42862

Frequently Asked Questions

What is NSN 5950-00-645-0971?

NSN 5950-00-645-0971 is a Transformer,power, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-645-0971?

NSN 5950-00-645-0971 has 4 cross-referenced part numbers: 4982 (Transformer Engineers Co a Div of Standard Industries Inc), 817287 (Berkshire Transformer), 42862 (Coast/advanced Chip Magnetics, Inc.), 817287 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).

What NSN replaces 5950-00-645-0971?

There are 6 known substitutes for 5950-00-645-0971: 5950-00-085-0786, 5345-00-184-1374, 5935-00-280-2193 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 817287?

Key specifications for 817287: Inclosure Type: HERMETICALLY SEALED; Winding Operating Voltage: 115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY; Winding Operating Current: 500.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY; Winding Operating Voltage: 9.00 AC VOLTS NOMINAL AND 18.00 AC VOLTS NOMINAL AND 75.00 AC VOLTS NOMINAL SINGLE COMPONENT THIRD SECONDARY. 21 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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