PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21378Transformer,power

Raytheon Company Dba Raytheon Co · NSN 5950-00-866-2486 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-866-2486 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-866-2486. Primary manufacturer part number: 21378.
Features
  • Transformer,power — FSC 5950
  • Mounting Facility Quantity: 4 SINGLE GROUP
  • Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
  • Thread Quantity Per Inch: 40 SINGLE GROUP
  • Winding Operating Voltage: 63.60 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
  • Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
  • Nominal Thread Size: 0.112 INCHES SINGLE GROUP IN
  • 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 5950-00-866-2486, 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 Raytheon Company Dba Raytheon Co. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-866-2486
Primary Part Number21378
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerRaytheon Company Dba Raytheon Co
StatusACTIVE
Mounting Facility Quantity4 SINGLE GROUP
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Thread Quantity Per Inch40 SINGLE GROUP
Winding Operating Voltage63.60 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Nominal Thread Size0.112 INCHES SINGLE GROUP IN
Winding Operating Voltage115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Criticality Code JustificationFEAT
Center to Center Distance Between Mounting Facilities Parallel to Length1.500 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Frequency Rating400.0 HERTZ NOMINAL SINGLE COMPONENT
Terminal Type and Quantity5 TAB, SOLDER LUG
Reliability IndicatorNOT ESTABLISHED
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Inclosure TypeHERMETICALLY SEALED
Center to Center Distance Between Mounting Facilities Parallel to Width1.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Winding Operating Current2.5 AMPERES AC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
Mounting MethodTHREADED HOLE(S) SINGLE GROUP
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
3030-00-001-12459360 INTERCHANGEABLE
Belts,v,matched Set
Gates Corporation
3110-00-100-2365204N INTERCHANGEABLE
Bearing,ball,annular
Fag Bearings Corporation
6620-00-848-9607C3NN17360K INTERCHANGEABLE
Meter Assy
New Holland N.v.nc.
5930-00-913-2109PM21378 INTERCHANGEABLE
Switch,push
Mason Electric Co. Dba Mason Controls
5930-00-923-7743213-78 INTERCHANGEABLE
Switch,toggle
Pitney Bowes Inc.
5962-01-067-9514LM140LAH-15/883 INTERCHANGEABLE
Microcircuit,linear
National Semiconductor Corporation
9540-01-071-5883 INTERCHANGEABLE
Angle,structural
1620-01-669-63102-1378 INTERCHANGEABLE
Retainer,disk Brake,aircraft
Goodrich Corporation Div Collins Aerospace, Landing Systems (wheels & Brakes)
Cross-Reference Index
Part NumberManufacturer
17360 Dyco Electronics Inc (USA)
0665258-0501 Raytheon Company Dba Raytheon Co (USA)
21378 Trio Laboratories Inc (USA)
0665258-0501 Rex Systems Incorporated Dba Rex Systems Inc (USA)
3047A1 Electronic Transformer Corp Div Electronic Transformer Corporation (USA)
PEI 7284 Precision Electronics, Inc (USA)
21378 PRIMARY Raytheon Company Dba Raytheon Co (USA)
5950PL0183218 Jednolity Indeks Materialowy - Uniform Material Index (POL)
Related Parts
3030-00-001-1245INTERCHANGEABLE
BELTS,V,MATCHED SET
9360
3110-00-100-2365INTERCHANGEABLE
BEARING,BALL,ANNULAR
204N
6620-00-848-9607INTERCHANGEABLE
METER ASSY
C3NN17360K
5930-00-913-2109INTERCHANGEABLE
SWITCH,PUSH
PM21378
5930-00-923-7743INTERCHANGEABLE
SWITCH,TOGGLE
213-78
5962-01-067-9514INTERCHANGEABLE
MICROCIRCUIT,LINEAR
LM140LAH-15/883
9540-01-071-5883INTERCHANGEABLE
ANGLE,STRUCTURAL
1620-01-669-6310INTERCHANGEABLE
RETAINER,DISK BRAKE,AIRCRAFT
2-1378

Frequently Asked Questions

What is NSN 5950-00-866-2486?

NSN 5950-00-866-2486 is a Transformer,power, manufactured by Raytheon Company Dba Raytheon Co, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-866-2486?

NSN 5950-00-866-2486 has 8 cross-referenced part numbers: 17360 (Dyco Electronics Inc), 0665258-0501 (Raytheon Company Dba Raytheon Co), 21378 (Trio Laboratories Inc), 0665258-0501 (Rex Systems Incorporated Dba Rex Systems Inc), 3047A1 (Electronic Transformer Corp Div Electronic Transformer Corporation) and 3 more.

What NSN replaces 5950-00-866-2486?

There are 8 known substitutes for 5950-00-866-2486: 3030-00-001-1245, 3110-00-100-2365, 6620-00-848-9607 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21378?

Key specifications for 21378: Mounting Facility Quantity: 4 SINGLE GROUP; Overall Width: 1.600 INCHES MAXIMUM IN; Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT; Thread Quantity Per Inch: 40 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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