PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18556Reactor

Freed Transformer Co · NSN 5950-00-602-6649 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-602-6649 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-602-6649. Primary manufacturer part number: 18556.
Features
  • Reactor — FSC 5950
  • Terminal Type and Quantity: 2 TAB, SOLDER LUG
  • Body Height: 3.500 INCHES NOMINAL IN
  • Thread Quantity Per Inch: 32 SINGLE GROUP
  • Inclosure Type: FULLY INCLOSED
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
  • Nominal Thread Size: 0.164 INCHES SINGLE GROUP IN
  • Inductance Rating: 5.00 HENRY NOMINAL SINGLE COMPONENT SINGLE WINDING
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Reactor, cataloged under National Stock Number 5950-00-602-6649, 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 17 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5950-00-602-6649
Primary Part Number18556
Item NameReactor
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerFreed Transformer Co
StatusCANCELLED
Terminal Type and Quantity2 TAB, SOLDER LUG
Body Height3.500 INCHES NOMINAL IN
Thread Quantity Per Inch32 SINGLE GROUP
Inclosure TypeFULLY INCLOSED
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Nominal Thread Size0.164 INCHES SINGLE GROUP IN
Inductance Rating5.00 HENRY NOMINAL SINGLE COMPONENT SINGLE WINDING
Mounting Facility Quantity4 SINGLE GROUP
Mounting MethodTHREADED STUD(S) SINGLE GROUP
Inductance TypeFIXED
DC Resistance Rating in Ohms100.000 SINGLE COMPONENT SINGLE WINDING
Center to Center Distance Between Mounting Facilities Parallel to Length2.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Body Width2.625 INCHES NOMINAL IN
Body Length2.225 INCHES NOMINAL IN
Winding Operating Current100.0 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE WINDING
Center to Center Distance Between Mounting Facilities Parallel to Width1.750 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Winding Quantity1 SINGLE COMPONENT
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
5950-00-055-359218-400 INTERCHANGEABLE
Coil,radio Frequency
Albert Frei & Sons, Inc. Dba Afs
6620-00-199-8730 INTERCHANGEABLE
Indicator,pressure
6145-00-669-6700 INTERCHANGEABLE
Wire,electrical
3110-00-889-561110068341 INTERCHANGEABLE
Bearing,roller,cylindrical
Kingsbury, Inc. Dba Messinger Bearings Div Messinger Bearings
1730-01-142-909418556 INTERCHANGEABLE
Bracket,dead End
Time Manufacturing Company Dba Time Manufacturing Company
5330-01-307-237418556 INTERCHANGEABLE
Gasket
Aerco International, Inc. Dba Aerco International Inc
6240-01-352-0438 INTERCHANGEABLE
Lamp,fluorescent
4130-01-459-360318556 INTERCHANGEABLE
Vacu-Discs
Dcm Clean Air Products, Inc.
Cross-Reference Index
Part NumberManufacturer
B107209 Fada Radio and Electric Co Inc (USA)
18556 PRIMARY Freed Transformer Co (USA)
Related Parts
5950-00-055-3592INTERCHANGEABLE
COIL,RADIO FREQUENCY
18-400
6620-00-199-8730INTERCHANGEABLE
INDICATOR,PRESSURE
6145-00-669-6700INTERCHANGEABLE
WIRE,ELECTRICAL
3110-00-889-5611INTERCHANGEABLE
BEARING,ROLLER,CYLINDRICAL
10068341
1730-01-142-9094INTERCHANGEABLE
BRACKET,DEAD END
18556
5330-01-307-2374INTERCHANGEABLE
GASKET
18556
6240-01-352-0438INTERCHANGEABLE
LAMP,FLUORESCENT
4130-01-459-3603INTERCHANGEABLE
VACU-DISCS
18556

Frequently Asked Questions

What is NSN 5950-00-602-6649?

NSN 5950-00-602-6649 is a Reactor, manufactured by Freed Transformer Co, classified under FSC 5950 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5950-00-602-6649?

NSN 5950-00-602-6649 has 2 cross-referenced part numbers: B107209 (Fada Radio and Electric Co Inc), 18556 (Freed Transformer Co).

What NSN replaces 5950-00-602-6649?

There are 8 known substitutes for 5950-00-602-6649: 5950-00-055-3592, 6620-00-199-8730, 6145-00-669-6700 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 18556?

Key specifications for 18556: Terminal Type and Quantity: 2 TAB, SOLDER LUG; Body Height: 3.500 INCHES NOMINAL IN; Thread Quantity Per Inch: 32 SINGLE GROUP; Inclosure Type: FULLY INCLOSED. 17 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5950-00-602-6649 still in active supply?

NSN 5950-00-602-6649 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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