PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12846Transformer,power

Magnespec Inc · NSN 5950-01-057-5040 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-01-057-5040 — this item is cataloged by the U.S. Government under National Stock Number 5950-01-057-5040. Primary manufacturer part number: 12846.
Features
  • Transformer,power — FSC 5950
  • Reliability Indicator: NOT ESTABLISHED
  • Winding Power Rating: 9.0 VOLTS-AMPERES SINGLE COMPONENT SECOND SECONDARY
  • Input-Output Phase Relationship: THREE PHASE TO THREE PHASE AND THREE PHASE TO SIX PHASE SINGLE COMPONENT
  • Winding Operating Voltage: 26.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
  • Maximum Transformer Power Rating: 352.3 VOLT-AMPERE SINGLE COMPONENT
  • Maximum Operating Temp: 125.0 CELSIUS DEGC
  • Winding Operating Current: 6.0 AMPERES AC MAXIMUM SINGLE COMPONENT THIRD SECONDARY
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-01-057-5040, 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 Magnespec Inc. Government technical data includes 29 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-01-057-5040
Primary Part Number12846
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerMagnespec Inc
StatusACTIVE
Reliability IndicatorNOT ESTABLISHED
Winding Power Rating9.0 VOLTS-AMPERES SINGLE COMPONENT SECOND SECONDARY
Input-Output Phase RelationshipTHREE PHASE TO THREE PHASE AND THREE PHASE TO SIX PHASE SINGLE COMPONENT
Winding Operating Voltage26.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
Maximum Transformer Power Rating352.3 VOLT-AMPERE SINGLE COMPONENT
Maximum Operating Temp125.0 CELSIUS DEGC
Winding Operating Current6.0 AMPERES AC MAXIMUM SINGLE COMPONENT THIRD SECONDARY
Winding Operating Voltage17.30 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY
Body Height3.440 INCHES NOMINAL IN
Body Length4.800 INCHES MAXIMUM IN
Winding Operating Current2.0 AMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
Winding Function and Quantity1 PRIMARY AND 3 SECONDARY SINGLE COMPONENT
Winding Power Rating90.0 VOLTS-AMPERES SINGLE COMPONENT FIRST SECONDARY
Center to Center Distance Between Mounting Facilities Parallel to Length4.200 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Inclosure TypeFULLY INCLOSED
Center to Center Distance Between Mounting Facilities Parallel to Width1.900 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Mounting Facility Quantity4 SINGLE GROUP
Body Width2.500 INCHES MAXIMUM IN
Frequency Rating480.0 HERTZ MAXIMUM SINGLE COMPONENT
Transformer Winding Connection TypeDELTA-WYE
Mounting MethodTHREADED HOLE(S) SINGLE GROUP
Terminal Type and Quantity18 TURRET
Winding Operating Voltage24.40 AC VOLTS NOMINAL SINGLE COMPONENT THIRD SECONDARY
Winding Operating Current300.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
Winding Shielding MethodINTERNAL SHIELD GROUNDED TO INCLOSURE AND BROUGHT OUT TO TERMINAL SINGLE COMPONENT
Thread Series DesignatorUNF SINGLE GROUP
Winding Operating Voltage198.50 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Winding Power Rating253.3 VOLTS-AMPERES SINGLE COMPONENT THIRD SECONDARY
Nominal Thread Size0.190 INCHES SINGLE GROUP IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
2835-00-340-758812846 INTERCHANGEABLE
Line Assy,fuel Pres
Alamo Aircraft, Ltd.
2805-00-424-548618-145 INTERCHANGEABLE
Ring,piston
Dresser Industries Inc Leroi Div
3110-00-554-5968 INTERCHANGEABLE
Bearing,ball,annular
5950-00-646-0868 INTERCHANGEABLE
Reactor
5950-00-648-392412846 INTERCHANGEABLE
Transformer,power
Cae Usa Inc.
2910-00-844-826512846 INTERCHANGEABLE
Carburetor,float
Zenith Fuel Systems Llc
1650-00-890-768218145 INTERCHANGEABLE
Cap,valve
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
5961-00-931-0385RT9343 INTERCHANGEABLE
Transistor
Raytheon Company Div Corp
5310-00-961-801218145 INTERCHANGEABLE
Nut,piston Socket
Eaton Aerospace, Llc Dba Jackson South
5935-01-015-828918145 INTERCHANGEABLE
Connector,receptacle,electrical
Drs Advanced Isr, Llc
Cross-Reference Index
Part NumberManufacturer
12846 PRIMARY Magnespec Inc (USA)
984852-1C Raytheon Company Dba Raytheon (USA)
18145 Robert M. Hadley Company, Inc. (USA)
PA60087-1 Raytheon Company Dba Raytheon (USA)
Related Parts
2835-00-340-7588INTERCHANGEABLE
LINE ASSY,FUEL PRES
12846
2805-00-424-5486INTERCHANGEABLE
RING,PISTON
18-145
3110-00-554-5968INTERCHANGEABLE
BEARING,BALL,ANNULAR
5950-00-646-0868INTERCHANGEABLE
REACTOR
5950-00-648-3924INTERCHANGEABLE
TRANSFORMER,POWER
12846
2910-00-844-8265INTERCHANGEABLE
CARBURETOR,FLOAT
12846
1650-00-890-7682INTERCHANGEABLE
CAP,VALVE
18145
5961-00-931-0385INTERCHANGEABLE
TRANSISTOR
RT9343
5310-00-961-8012INTERCHANGEABLE
NUT,PISTON SOCKET
18145
5935-01-015-8289INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
18145
5330-01-068-1819INTERCHANGEABLE
GASKET
12846
5305-01-211-0302INTERCHANGEABLE
SCREW
N34109

Frequently Asked Questions

What is NSN 5950-01-057-5040?

NSN 5950-01-057-5040 is a Transformer,power, manufactured by Magnespec Inc, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-01-057-5040?

NSN 5950-01-057-5040 has 4 cross-referenced part numbers: 12846 (Magnespec Inc), 984852-1C (Raytheon Company Dba Raytheon), 18145 (Robert M. Hadley Company, Inc.), PA60087-1 (Raytheon Company Dba Raytheon).

What NSN replaces 5950-01-057-5040?

There are 12 known substitutes for 5950-01-057-5040: 2835-00-340-7588, 2805-00-424-5486, 3110-00-554-5968 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12846?

Key specifications for 12846: Reliability Indicator: NOT ESTABLISHED; Winding Power Rating: 9.0 VOLTS-AMPERES SINGLE COMPONENT SECOND SECONDARY; Input-Output Phase Relationship: THREE PHASE TO THREE PHASE AND THREE PHASE TO SIX PHASE SINGLE COMPONENT; Winding Operating Voltage: 26.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY. 29 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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