PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

CO-65-CReactor

Espey Mfg and Electronics Corp · NSN 5950-00-581-9774 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-581-9774 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-581-9774. Primary manufacturer part number: CO-65-C.
Features
  • Reactor — FSC 5950
  • Mounting Facility Quantity: 4 SINGLE GROUP
  • Winding Quantity: 1 SINGLE COMPONENT
  • Frequency Rating: 60.0 HERTZ NOMINAL SINGLE COMPONENT
  • Body Width: 1.375 INCHES MAXIMUM IN
  • Body Length: 2.125 INCHES MAXIMUM IN
  • Inductance Type: FIXED
  • Inductance Rating: 500.00 MILLIHENRIES MINIMUM 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 5950-00-581-9774, 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 Espey Mfg and Electronics Corp. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-581-9774
Primary Part NumberCO-65-C
Item NameReactor
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerEspey Mfg and Electronics Corp
StatusACTIVE
Mounting Facility Quantity4 SINGLE GROUP
Winding Quantity1 SINGLE COMPONENT
Frequency Rating60.0 HERTZ NOMINAL SINGLE COMPONENT
Body Width1.375 INCHES MAXIMUM IN
Body Length2.125 INCHES MAXIMUM IN
Inductance TypeFIXED
Inductance Rating500.00 MILLIHENRIES MINIMUM SINGLE COMPONENT SINGLE WINDING
Body Height1.750 INCHES MAXIMUM IN
DC Resistance Rating in Ohms30.000 SINGLE COMPONENT SINGLE WINDING
Center to Center Distance Between Mounting Facilities Parallel to Width1.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Mounting MethodFLANGE AND SLOT SINGLE GROUP
Maximum Operating Temp105.0 CELSIUS DEGC
Center to Center Distance Between Mounting Facilities Parallel to Length1.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Winding Operating Current320.0 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE WINDING
Terminal Type and Quantity2 TAB, SOLDER LUG
Rating MethodELECTRICAL SINGLE COMPONENT SINGLE WINDING
Mounting Slot Width0.156 INCHES NOMINAL SINGLE GROUP IN
Inclosure TypeOPEN
Reliability IndicatorNOT ESTABLISHED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5999-00-031-1438679-259 INTERCHANGEABLE
Contact,electrical
Eaton Corp Opns & Technical Center
3455-00-131-621919609 INTERCHANGEABLE
Reamer,machine
Brown & Sharpe, Inc. Div Precision Measuring Instruments, Tesa Usa
5133-00-266-9469 INTERCHANGEABLE
Drill,twist
4330-00-916-20759194068-13 INTERCHANGEABLE
Filter,valve
Us Army Aviation and Missile Command
5365-00-954-347475069 INTERCHANGEABLE
Ring,externally Threaded
Triumph Engine Control Systems Llc
5950-01-101-2322672-0421-010 INTERCHANGEABLE
Transformer,power
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
5305-01-267-2958 INTERCHANGEABLE
Screw,cap,socket Head
5133-01-443-349325622 INTERCHANGEABLE
Counterbore,machine
Time Fastener Co Inc
Cross-Reference Index
Part NumberManufacturer
CO-65-C Espey Mfg and Electronics Corp (USA)
678-0805-00 Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA)
CO-65-C Espey Mfg. & Electronics Corp. (USA)
25622 Freed Transformer Co (USA)
Related Parts
5999-00-031-1438INTERCHANGEABLE
CONTACT,ELECTRICAL
679-259
3455-00-131-6219INTERCHANGEABLE
REAMER,MACHINE
19609
5133-00-266-9469INTERCHANGEABLE
DRILL,TWIST
4330-00-916-2075INTERCHANGEABLE
FILTER,VALVE
9194068-13
5365-00-954-3474INTERCHANGEABLE
RING,EXTERNALLY THREADED
75069
5950-01-101-2322INTERCHANGEABLE
TRANSFORMER,POWER
672-0421-010
5305-01-267-2958INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5133-01-443-3493INTERCHANGEABLE
COUNTERBORE,MACHINE
25622

Frequently Asked Questions

What is NSN 5950-00-581-9774?

NSN 5950-00-581-9774 is a Reactor, manufactured by Espey Mfg and Electronics Corp, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-581-9774?

NSN 5950-00-581-9774 has 4 cross-referenced part numbers: CO-65-C (Espey Mfg and Electronics Corp), 678-0805-00 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems), CO-65-C (Espey Mfg. & Electronics Corp.), 25622 (Freed Transformer Co).

What NSN replaces 5950-00-581-9774?

There are 8 known substitutes for 5950-00-581-9774: 5999-00-031-1438, 3455-00-131-6219, 5133-00-266-9469 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of CO-65-C?

Key specifications for CO-65-C: Mounting Facility Quantity: 4 SINGLE GROUP; Winding Quantity: 1 SINGLE COMPONENT; Frequency Rating: 60.0 HERTZ NOMINAL SINGLE COMPONENT; Body Width: 1.375 INCHES MAXIMUM IN. 19 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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