PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

25970Saturable Reactor

Freed Transformer Co · NSN 5950-00-512-0148 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-512-0148 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-512-0148. Primary manufacturer part number: 25970.
Features
  • Saturable Reactor — FSC 5950
  • Reliability Indicator: NOT ESTABLISHED
  • Mounting Facility Quantity: 4 SINGLE GROUP
  • Body Width: 3.500 INCHES NOMINAL IN
  • Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY AND 2 CONTROL SINGLE COMPONENT
  • Body Height: 5.500 INCHES NOMINAL IN
  • Winding Operating Voltage: 60.00 AC VOLTS MINIMUM AND 90.00 AC VOLTS MAXIMUM SINGLE COMPONENT SINGLE PRIMARY
  • Center to Center Distance Between Mounting Facilities Parallel to Length: 2.500 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Saturable Reactor, cataloged under National Stock Number 5950-00-512-0148, 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 Freed Transformer Co. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-512-0148
Primary Part Number25970
Item NameSaturable Reactor
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerFreed Transformer Co
StatusACTIVE
Reliability IndicatorNOT ESTABLISHED
Mounting Facility Quantity4 SINGLE GROUP
Body Width3.500 INCHES NOMINAL IN
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY AND 2 CONTROL SINGLE COMPONENT
Body Height5.500 INCHES NOMINAL IN
Winding Operating Voltage60.00 AC VOLTS MINIMUM AND 90.00 AC VOLTS MAXIMUM SINGLE COMPONENT SINGLE PRIMARY
Center to Center Distance Between Mounting Facilities Parallel to Length2.500 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Inclosure TypeFULLY INCLOSED
Thread Series DesignatorUNF SINGLE GROUP
Center to Center Distance Between Mounting Facilities Parallel to Width3.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Nominal Thread Size0.190 INCHES SINGLE GROUP IN
Mounting MethodTHREADED STUD(S) SINGLE GROUP
Winding Operating Voltage90.00 AC VOLTS MINIMUM AND 115.00 AC VOLTS MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
Terminal Type and Quantity8 PIN
Body Length4.125 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5330-00-178-21903653618 INTERCHANGEABLE
Seal,plain Encased
General Motors Llc Dba General Motors Llc
5305-00-445-3449S156A INTERCHANGEABLE
Screw,cap,hexagon Head
Cummins Inc.
2915-00-508-530825118 INTERCHANGEABLE
Spring,fuel Pump Co
Hydro-Aire Aerospace Corp
6750-01-016-2536 INTERCHANGEABLE
Paper,photographic
5310-01-240-8807425-118 INTERCHANGEABLE
Nut,plain,hexagon
Cnh Industrial America Llc Dba Cnh America
4720-01-538-7038 INTERCHANGEABLE
Hose Assembly,nonmetallic
5920-01-603-263604-21818 INTERCHANGEABLE
Absorber,overvoltage
Department of Defense Project Manager-Mobile Electric Power
1560-01-715-07092-5970-6 INTERCHANGEABLE
Web,structural Component,aircraf
The Boeing Company Div Defense
1560-01-724-80232-5970-5 INTERCHANGEABLE
Web,structural Component,aircraf
The Boeing Company Div Defense
Cross-Reference Index
Part NumberManufacturer
25970 Freed Transformer Co (USA)
25118 Lockheed Martin Corp Lockheed Martin Mission Systems (USA)
25118 Lah Enterprises Inc (USA)
Related Parts
5330-00-178-2190INTERCHANGEABLE
SEAL,PLAIN ENCASED
3653618
5305-00-445-3449INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
S156A
2915-00-508-5308INTERCHANGEABLE
SPRING,FUEL PUMP CO
25118
6750-01-016-2536INTERCHANGEABLE
PAPER,PHOTOGRAPHIC
5310-01-240-8807INTERCHANGEABLE
NUT,PLAIN,HEXAGON
425-118
4720-01-538-7038INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
5920-01-603-2636INTERCHANGEABLE
ABSORBER,OVERVOLTAGE
04-21818
1560-01-715-0709INTERCHANGEABLE
WEB,STRUCTURAL COMPONENT,AIRCRAF
2-5970-6
1560-01-724-8023INTERCHANGEABLE
WEB,STRUCTURAL COMPONENT,AIRCRAF
2-5970-5

Frequently Asked Questions

What is NSN 5950-00-512-0148?

NSN 5950-00-512-0148 is a Saturable Reactor, manufactured by Freed Transformer Co, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-512-0148?

NSN 5950-00-512-0148 has 3 cross-referenced part numbers: 25970 (Freed Transformer Co), 25118 (Lockheed Martin Corp Lockheed Martin Mission Systems), 25118 (Lah Enterprises Inc).

What NSN replaces 5950-00-512-0148?

There are 9 known substitutes for 5950-00-512-0148: 5330-00-178-2190, 5305-00-445-3449, 2915-00-508-5308 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 25970?

Key specifications for 25970: Reliability Indicator: NOT ESTABLISHED; Mounting Facility Quantity: 4 SINGLE GROUP; Body Width: 3.500 INCHES NOMINAL IN; Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY AND 2 CONTROL SINGLE COMPONENT. 15 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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