PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40300Saturable Reactor

Freed Transformer Co · NSN 5950-00-723-3881 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-723-3881 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-723-3881. Primary manufacturer part number: 40300.
Features
  • Saturable Reactor — FSC 5950
  • Mounting Method: UNTHREADED HOLE(S) SINGLE GROUP
  • Frequency Rating: 60.0 HERTZ NOMINAL SINGLE COMPONENT
  • Terminal Type and Quantity: 6 TAB, SOLDER LUG
  • DC Resistance Rating in Ohms: 10.000 SINGLE COMPONENT ALL CONTROL
  • Saturation Current Rating: 40.0 MILLIAMPERES
  • Winding Operating Voltage: 33.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
  • DC Resistance Rating in Ohms: 0.860 SINGLE COMPONENT SINGLE PRIMARY
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Saturable Reactor, cataloged under National Stock Number 5950-00-723-3881, 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 14 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-723-3881
Primary Part Number40300
Item NameSaturable Reactor
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerFreed Transformer Co
StatusACTIVE
Mounting MethodUNTHREADED HOLE(S) SINGLE GROUP
Frequency Rating60.0 HERTZ NOMINAL SINGLE COMPONENT
Terminal Type and Quantity6 TAB, SOLDER LUG
DC Resistance Rating in Ohms10.000 SINGLE COMPONENT ALL CONTROL
Saturation Current Rating40.0 MILLIAMPERES
Winding Operating Voltage33.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
DC Resistance Rating in Ohms0.860 SINGLE COMPONENT SINGLE PRIMARY
Mounting Hole Diameter0.147 INCHES NOMINAL SINGLE GROUP IN
Center to Center Distance Between Mounting Facilities Parallel to Width4.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Center to Center Distance Between Mounting Facilities Parallel to Length4.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Mounting Facility Quantity4 SINGLE GROUP
Winding Function and Quantity1 PRIMARY AND 2 CONTROL SINGLE COMPONENT
Inclosure TypeOPEN
Reliability IndicatorNOT ESTABLISHED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6680-00-160-12002587614 INTERCHANGEABLE
Gage Rod-Breather,liquid Level
Naval Ship Systems Command
2940-00-179-550542970 INTERCHANGEABLE
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Wix Corp
6150-00-214-2682119032 INTERCHANGEABLE
Housing,electrical Rotating Equi
Schwitzer Engine Components a Household Intl Co
3455-00-224-3667B94.19 TABLE 7 6X1/8X1 INTERCHANGEABLE
Cutter,milling,metal Slitting
American National Standards Institute Incorporated Dba American National Standards Institute
2520-00-463-4432A3838Y77 INTERCHANGEABLE
Cap Assy,drive Shaft
Meritor Industrial Products, Llc
4820-00-725-391140-300 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives
1560-00-890-3673A109-6-5 INTERCHANGEABLE
Brush,wing Closure
Legacy Components Llc
5930-00-929-269740300 INTERCHANGEABLE
Switch,thermostatic
Norris Dispenser Company
6685-01-377-6386 INTERCHANGEABLE
Gage,pressure,dial Indicating
4730-01-378-259071651 INTERCHANGEABLE
Fitting,lubricant Pressure Relie
Textron Lycoming Inc Williamsport Plant
Cross-Reference Index
Part NumberManufacturer
71651 Sensor Systems, L.l.c. Dba Sensor Systems Llc (USA)
40300 PRIMARY Freed Transformer Co (USA)
Related Parts
6680-00-160-1200INTERCHANGEABLE
GAGE ROD-BREATHER,LIQUID LEVEL
2587614
2940-00-179-5505INTERCHANGEABLE
FILTER ELEMENT,INTAKE AIR CLEANE
42970
6150-00-214-2682INTERCHANGEABLE
HOUSING,ELECTRICAL ROTATING EQUI
119032
3455-00-224-3667INTERCHANGEABLE
CUTTER,MILLING,METAL SLITTING
B94.19 TABLE 7 6X1/8X1
2520-00-463-4432INTERCHANGEABLE
CAP ASSY,DRIVE SHAFT
A3838Y77
4820-00-725-3911INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
40-300
1560-00-890-3673INTERCHANGEABLE
BRUSH,WING CLOSURE
A109-6-5
5930-00-929-2697INTERCHANGEABLE
SWITCH,THERMOSTATIC
40300
6685-01-377-6386INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
4730-01-378-2590INTERCHANGEABLE
FITTING,LUBRICANT PRESSURE RELIE
71651
7035-01-434-6134INTERCHANGEABLE
ERASER,MAGNETIC
6685-01-494-0634INTERCHANGEABLE
GAGE,VACUUM,INDICATING
40-0300

Frequently Asked Questions

What is NSN 5950-00-723-3881?

NSN 5950-00-723-3881 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 5950-00-723-3881?

NSN 5950-00-723-3881 has 2 cross-referenced part numbers: 71651 (Sensor Systems, L.l.c. Dba Sensor Systems Llc), 40300 (Freed Transformer Co).

What NSN replaces 5950-00-723-3881?

There are 12 known substitutes for 5950-00-723-3881: 6680-00-160-1200, 2940-00-179-5505, 6150-00-214-2682 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40300?

Key specifications for 40300: Mounting Method: UNTHREADED HOLE(S) SINGLE GROUP; Frequency Rating: 60.0 HERTZ NOMINAL SINGLE COMPONENT; Terminal Type and Quantity: 6 TAB, SOLDER LUG; DC Resistance Rating in Ohms: 10.000 SINGLE COMPONENT ALL CONTROL. 17 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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