PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

K-266-3Transformer,power

Payne Magnetics, Inc. · NSN 5950-01-166-2737 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-01-166-2737 — this item is cataloged by the U.S. Government under National Stock Number 5950-01-166-2737. Primary manufacturer part number: K-266-3.
Features
  • Transformer,power — FSC 5950
  • Reliability Indicator: NOT ESTABLISHED
  • Frequency Rating: 35.0 HERTZ MINIMUM AND 55.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
  • Winding Operating Current: 2.0 AMPERES AC MAXIMUM SINGLE COMPONENT THIRD SECONDARY
  • Winding Operating Voltage: 300.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
  • Winding Function and Quantity: 1 PRIMARY AND 7 SECONDARY SINGLE COMPONENT
  • Inclosure Type: FULLY INCLOSED
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-01-166-2737, 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 Payne Magnetics, Inc.. Government technical data includes 22 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 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
NSN5950-01-166-2737
Primary Part NumberK-266-3
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerPayne Magnetics, Inc.
StatusACTIVE
Reliability IndicatorNOT ESTABLISHED
Frequency Rating35.0 HERTZ MINIMUM AND 55.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Winding Operating Current2.0 AMPERES AC MAXIMUM SINGLE COMPONENT THIRD SECONDARY
Winding Operating Voltage300.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Winding Function and Quantity1 PRIMARY AND 7 SECONDARY SINGLE COMPONENT
Inclosure TypeFULLY INCLOSED
Winding Operating Current50.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Body Outside Diameter1.600 INCHES MAXIMUM IN
Winding Operating Voltage16.30 AC VOLTS NOMINAL SINGLE COMPONENT FOURTH SECONDARY
Winding Operating Voltage16.30 AC VOLTS NOMINAL SINGLE COMPONENT THIRD SECONDARY
Winding Operating Voltage85.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY
Terminal Type and Quantity16 PIN
Body Length0.800 INCHES MAXIMUM IN
Mounting MethodTHREADED HOLE(S) SINGLE GROUP
Winding Operating Voltage80.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
Winding Operating Current10.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
Winding Operating Current1.5 AMPERES AC MAXIMUM SINGLE COMPONENT FOURTH SECONDARY
Nominal Thread Size0.138 INCHES SINGLE GROUP IN
Mounting Facility Quantity1 SINGLE GROUP
Maximum Operating Temp130.0 CELSIUS DEGC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5120-00-040-27598002383 INTERCHANGEABLE
Jack,leveling-Support
U S Army Tank Automotive Command Amsta-Im-Mm
2530-00-289-7274 INTERCHANGEABLE
Brake Lining Kit
5962-01-178-243742781 INTERCHANGEABLE
Microcircuit,digital
Raytheon Company Div Rmd Strategic
3120-01-395-684442781 INTERCHANGEABLE
Parts Kit,bearing Replacement,me
Brunswick Corp Dba Mercury Marine Div Mercury Marine
4810-01-428-692342781 INTERCHANGEABLE
Valve,solenoid
Imi Cornelius Inc.
5995-01-658-192242781 INTERCHANGEABLE
Cable Assembly,special Purpose,e
The Connectivity Center, Inc.
Cross-Reference Index
Part NumberManufacturer
PRK266-2 Payne Magnetics, Inc. (USA)
8002383 Honeywell International Inc. Dba Honeywell International (USA)
8002383-1 Honeywell International Inc. Dba Honeywell International (USA)
42781 Coast/advanced Chip Magnetics, Inc. (USA)
PRK266-3 Payne Magnetics, Inc. (USA)
K-266-2 Payne Magnetics, Inc. (USA)
K-266-3 PRIMARY Payne Magnetics, Inc. (USA)
PEI 6338 Precision Electronics, Inc (USA)
Related Parts
5120-00-040-2759INTERCHANGEABLE
JACK,LEVELING-SUPPORT
8002383
2530-00-289-7274INTERCHANGEABLE
BRAKE LINING KIT
5962-01-178-2437INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
42781
3120-01-395-6844INTERCHANGEABLE
PARTS KIT,BEARING REPLACEMENT,ME
42781
4810-01-428-6923INTERCHANGEABLE
VALVE,SOLENOID
42781
5995-01-658-1922INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
42781

Frequently Asked Questions

What is NSN 5950-01-166-2737?

NSN 5950-01-166-2737 is a Transformer,power, manufactured by Payne Magnetics, Inc., classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-01-166-2737?

NSN 5950-01-166-2737 has 8 cross-referenced part numbers: PRK266-2 (Payne Magnetics, Inc.), 8002383 (Honeywell International Inc. Dba Honeywell International), 8002383-1 (Honeywell International Inc. Dba Honeywell International), 42781 (Coast/advanced Chip Magnetics, Inc.), PRK266-3 (Payne Magnetics, Inc.) and 3 more.

What NSN replaces 5950-01-166-2737?

There are 6 known substitutes for 5950-01-166-2737: 5120-00-040-2759, 2530-00-289-7274, 5962-01-178-2437 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of K-266-3?

Key specifications for K-266-3: Reliability Indicator: NOT ESTABLISHED; Frequency Rating: 35.0 HERTZ MINIMUM AND 55.0 KILOHERTZ MAXIMUM SINGLE COMPONENT; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP; Winding Operating Current: 2.0 AMPERES AC MAXIMUM SINGLE COMPONENT THIRD SECONDARY. 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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