PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12239Reactor-Transformer

Magnespec Inc · NSN 5950-00-223-0041 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-223-0041 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-223-0041. Primary manufacturer part number: 12239.
Features
  • Reactor-Transformer — FSC 5950
  • Inductance Rating: 161.00 MICROHENRIES MINIMUM AND 198.00 MICROHENRIES MAXIMUM SINGLE COMPONENT SINGLE WINDING
  • Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY SECOND COMPONENT
  • Winding Operating Current: 1.0 AMPERES DC MAXIMUM SINGLE COMPONENT SINGLE WINDING
  • Inclosure Type: FULLY INCLOSED
  • Reliability Indicator: NOT ESTABLISHED
  • Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE FIRST COMPONENT
  • Mounting Hole Diameter: 0.113 INCHES MINIMUM AND 0.123 INCHES MAXIMUM SINGLE GROUP IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Reactor-Transformer, cataloged under National Stock Number 5950-00-223-0041, 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 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-223-0041
Primary Part Number12239
Item NameReactor-Transformer
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerMagnespec Inc
StatusACTIVE
Inductance Rating161.00 MICROHENRIES MINIMUM AND 198.00 MICROHENRIES MAXIMUM SINGLE COMPONENT SINGLE WINDING
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SECOND COMPONENT
Winding Operating Current1.0 AMPERES DC MAXIMUM SINGLE COMPONENT SINGLE WINDING
Inclosure TypeFULLY INCLOSED
Reliability IndicatorNOT ESTABLISHED
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE FIRST COMPONENT
Mounting Hole Diameter0.113 INCHES MINIMUM AND 0.123 INCHES MAXIMUM SINGLE GROUP IN
Frequency Rating10.0 KILOHERTZ NOMINAL FIRST COMPONENT
Rating MethodELECTRICAL SINGLE COMPONENT SINGLE WINDING
Winding Operating Voltage11.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE WINDING
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SECOND COMPONENT
Mounting Facility Quantity1 SINGLE GROUP
Body Outside Diameter0.840 INCHES MAXIMUM IN
Frequency Rating31.5 KILOHERTZ MINIMUM AND 39.5 KILOHERTZ MAXIMUM SECOND COMPONENT
Terminal Type and Quantity9 TURRET
Rating MethodELECTRICAL SINGLE COMPONENT SINGLE PRIMARY
Mounting MethodUNTHREADED HOLE(S) SINGLE GROUP
Winding Operating Voltage13.20 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5133-00-189-9284 INTERCHANGEABLE
Drill,twist
5120-00-301-544552131-5901-998678PC91 INTERCHANGEABLE
Puller,mechanical
Naval Ship Systems Command
5945-00-407-1824905485-1 INTERCHANGEABLE
Relay,reed
General Dynamics Land Systems - Canadacorporation Div General Dynamics Mission Systems
2915-00-942-839112239 INTERCHANGEABLE
Clapper Assembly,fuel Control
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
5910-01-110-0387 INTERCHANGEABLE
Capacitor,fixed,plastic Dielectr
3110-01-169-6790S538K14 INTERCHANGEABLE
Bearing,ball,airframe
New Hampshire Ball Bearings Inc Div Hitech Division
6650-01-479-538613027735-5 INTERCHANGEABLE
Anti-Reflection Device,optical I
Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate
5310-01-513-5990 INTERCHANGEABLE
Washer,flat
3040-01-578-036719-0204-12 INTERCHANGEABLE
Lever,manual Control
Wescon Products Company Div Controls
5315-01-623-3811122-39 INTERCHANGEABLE
Pin,cotter
Parker Hannifin Corporation Div Village Marine Tech
Cross-Reference Index
Part NumberManufacturer
12239 PRIMARY Magnespec Inc (USA)
905485-1 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA)
Related Parts
5133-00-189-9284INTERCHANGEABLE
DRILL,TWIST
5120-00-301-5445INTERCHANGEABLE
PULLER,MECHANICAL
52131-5901-998678PC91
5945-00-407-1824INTERCHANGEABLE
RELAY,REED
905485-1
2915-00-942-8391INTERCHANGEABLE
CLAPPER ASSEMBLY,FUEL CONTROL
12239
5910-01-110-0387INTERCHANGEABLE
CAPACITOR,FIXED,PLASTIC DIELECTR
3110-01-169-6790INTERCHANGEABLE
BEARING,BALL,AIRFRAME
S538K14
6650-01-479-5386INTERCHANGEABLE
ANTI-REFLECTION DEVICE,OPTICAL I
13027735-5
5310-01-513-5990INTERCHANGEABLE
WASHER,FLAT
3040-01-578-0367INTERCHANGEABLE
LEVER,MANUAL CONTROL
19-0204-12
5315-01-623-3811INTERCHANGEABLE
PIN,COTTER
122-39

Frequently Asked Questions

What is NSN 5950-00-223-0041?

NSN 5950-00-223-0041 is a Reactor-Transformer, manufactured by Magnespec Inc, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-223-0041?

NSN 5950-00-223-0041 has 2 cross-referenced part numbers: 12239 (Magnespec Inc), 905485-1 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp).

What NSN replaces 5950-00-223-0041?

There are 10 known substitutes for 5950-00-223-0041: 5133-00-189-9284, 5120-00-301-5445, 5945-00-407-1824 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12239?

Key specifications for 12239: Inductance Rating: 161.00 MICROHENRIES MINIMUM AND 198.00 MICROHENRIES MAXIMUM SINGLE COMPONENT SINGLE WINDING; Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY SECOND COMPONENT; Winding Operating Current: 1.0 AMPERES DC MAXIMUM SINGLE COMPONENT SINGLE WINDING; Inclosure Type: FULLY INCLOSED. 20 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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