PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

WM-3666Transformer,power

Magnetic Components Inc · NSN 5950-00-649-9070 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-649-9070 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-649-9070. Primary manufacturer part number: WM-3666.
Features
  • Transformer,power — FSC 5950
  • Reliability Indicator: NOT ESTABLISHED
  • Winding Operating Current: 250.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
  • Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
  • Thread Quantity Per Inch: 32 SINGLE GROUP
  • Nominal Thread Size: 0.138 INCHES SINGLE GROUP IN
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
  • Winding Shielding Method: INTERNAL SHIELD GROUNDED TO CORE SINGLE COMPONENT
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-00-649-9070, 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 Magnetic Components Inc. Government technical data includes 21 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. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-649-9070
Primary Part NumberWM-3666
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerMagnetic Components Inc
StatusACTIVE
Reliability IndicatorNOT ESTABLISHED
Winding Operating Current250.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Thread Quantity Per Inch32 SINGLE GROUP
Nominal Thread Size0.138 INCHES SINGLE GROUP IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Winding Shielding MethodINTERNAL SHIELD GROUNDED TO CORE SINGLE COMPONENT
Body Length1.875 INCHES MAXIMUM IN
Center to Center Distance Between Mounting Facilities Parallel to Width1.375 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Body Height3.250 INCHES MAXIMUM IN
Body Width1.875 INCHES MAXIMUM IN
Center to Center Distance Between Mounting Facilities Parallel to Length1.375 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Maximum Operating Temp75.0 CELSIUS DEGC
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Mounting MethodTHREADED HOLE(S) SINGLE GROUP
Terminal Type and Quantity5 TAB, SOLDER LUG
Inclosure TypeFULLY INCLOSED
Frequency Rating60.0 HERTZ NOMINAL SINGLE COMPONENT
Winding Operating Voltage78.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Mounting Facility Quantity4 SINGLE GROUP
Winding Operating Voltage115.00 AC VOLTS NOMINAL AND 120.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5935-00-081-374231-026-1020 INTERCHANGEABLE
Cover,electrical Connector
Amphenol Corporation Div Amphenol Rf
4730-00-266-3899 INTERCHANGEABLE
Union,tube
4730-00-278-4824SAE J514-3 4-4 140239B INTERCHANGEABLE
Elbow,pipe
Sae International Dba Sae International
6760-00-282-79883666 INTERCHANGEABLE
Reel,photographic Film
Tayloreel Corp
5977-00-377-48243666 INTERCHANGEABLE
Ring,electrical Contact
Kurz & Root Generator Company, Llc
4940-00-391-4578 INTERCHANGEABLE
Shaft and Casing
5950-00-686-6452L285402-1 INTERCHANGEABLE
Transformer,power
Raytheon Company Dba Raytheon Co
5970-01-170-93263666 INTERCHANGEABLE
Insulator,plate
Fastenal Company Dba Av-Tech Industries Div Av-Tech Industries
5331-01-223-96333666 INTERCHANGEABLE
O-Ring
Hoyt Corporation
5310-01-396-8386 INTERCHANGEABLE
Nut,plain,knurled
Cross-Reference Index
Part NumberManufacturer
722899-263 Raytheon Company Dba Raytheon (USA)
3666 Magnetic Components Inc (USA)
722899-263 Raytheon Company Div Rmd Strategic (USA)
WM-3666 PRIMARY Magnetic Components Inc (USA)
Related Parts
5935-00-081-3742INTERCHANGEABLE
COVER,ELECTRICAL CONNECTOR
31-026-1020
4730-00-266-3899INTERCHANGEABLE
UNION,TUBE
4730-00-278-4824INTERCHANGEABLE
ELBOW,PIPE
SAE J514-3 4-4 140239B
6760-00-282-7988INTERCHANGEABLE
REEL,PHOTOGRAPHIC FILM
3666
5977-00-377-4824INTERCHANGEABLE
RING,ELECTRICAL CONTACT
3666
4940-00-391-4578INTERCHANGEABLE
SHAFT AND CASING
5950-00-686-6452INTERCHANGEABLE
TRANSFORMER,POWER
L285402-1
5970-01-170-9326INTERCHANGEABLE
INSULATOR,PLATE
3666
5331-01-223-9633INTERCHANGEABLE
O-RING
3666
5310-01-396-8386INTERCHANGEABLE
NUT,PLAIN,KNURLED
5310-01-513-7545INTERCHANGEABLE
NUT,PLAIN,HEXAGON
8036701

Frequently Asked Questions

What is NSN 5950-00-649-9070?

NSN 5950-00-649-9070 is a Transformer,power, manufactured by Magnetic Components Inc, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-649-9070?

NSN 5950-00-649-9070 has 4 cross-referenced part numbers: 722899-263 (Raytheon Company Dba Raytheon), 3666 (Magnetic Components Inc), 722899-263 (Raytheon Company Div Rmd Strategic), WM-3666 (Magnetic Components Inc).

What NSN replaces 5950-00-649-9070?

There are 11 known substitutes for 5950-00-649-9070: 5935-00-081-3742, 4730-00-266-3899, 4730-00-278-4824 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of WM-3666?

Key specifications for WM-3666: Reliability Indicator: NOT ESTABLISHED; Winding Operating Current: 250.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY; Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT; Thread Quantity Per Inch: 32 SINGLE GROUP. 22 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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