PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4659Transformer,power

Richmond Engineering Co Inc · NSN 5950-00-309-0858 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-309-0858 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-309-0858. Primary manufacturer part number: 4659.
Features
  • Transformer,power — FSC 5950
  • Mounting Method: FLANGE AND SLOT SINGLE GROUP
  • Center to Center Distance Between Mounting Facilities Parallel to Width: 2.875 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
  • Inclosure Type: OPEN
  • Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
  • Winding Operating Current: 7.5 AMPERES AC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
  • Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
  • Terminal Type and Quantity: 5 TAB, SOLDER LUG
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-00-309-0858, 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 Richmond Engineering Co Inc. Government technical data includes 19 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: Active.

Technical Specifications
ParameterValue
NSN5950-00-309-0858
Primary Part Number4659
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerRichmond Engineering Co Inc
StatusACTIVE
Mounting MethodFLANGE AND SLOT SINGLE GROUP
Center to Center Distance Between Mounting Facilities Parallel to Width2.875 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Inclosure TypeOPEN
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Winding Operating Current7.5 AMPERES AC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Terminal Type and Quantity5 TAB, SOLDER LUG
Winding Operating Voltage41.40 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Body Width4.250 INCHES NOMINAL IN
Frequency Rating60.0 HERTZ NOMINAL SINGLE COMPONENT
Center to Center Distance Between Mounting Facilities Parallel to Length4.375 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Winding Operating Voltage208.00 AC VOLTS NOMINAL AND 240.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Body Height4.375 INCHES NOMINAL IN
Winding Power Rating310.5 VOLTS-AMPERES SINGLE COMPONENT SINGLE SECONDARY
Mounting Facility Quantity4 SINGLE GROUP
Mounting Slot Width0.281 INCHES NOMINAL SINGLE GROUP IN
Reliability IndicatorNOT ESTABLISHED
Winding Operating Current1.25 AMPERES AC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY
Body Length5.250 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5310-00-146-07764659 INTERCHANGEABLE
Nut,plain,slotted,hexagon
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
2640-00-678-8616 INTERCHANGEABLE
Cap,pneumatic Valve
5905-00-688-99444659 INTERCHANGEABLE
Resistor,fixed,wire Wound
Ohmite Holding, L.l.c. Dba Ohmite Manufacturing
5330-00-799-66914659 INTERCHANGEABLE
Gasket
Rubbercraft Corporation of California, Ltd. Dba Rubbercraft Corp
3120-00-980-4763 INTERCHANGEABLE
Bearing,sleeve
5310-01-196-32484659 INTERCHANGEABLE
Nut,plain,hexagon
Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives
7690-01-390-04074659 INTERCHANGEABLE
Label
Howell Laboratories Inc Dba Howell Laboratories Inc
6680-01-487-07414659-02 INTERCHANGEABLE
Indicator Subassembly,rate of Fl
Howell Laboratories Inc Dba Howell Laboratories Inc
Cross-Reference Index
Part NumberManufacturer
4659 PRIMARY Richmond Engineering Co Inc (USA)
7002-0022 Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc (USA)
Related Parts
5310-00-146-0776INTERCHANGEABLE
NUT,PLAIN,SLOTTED,HEXAGON
4659
2640-00-678-8616INTERCHANGEABLE
CAP,PNEUMATIC VALVE
5905-00-688-9944INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND
4659
5330-00-799-6691INTERCHANGEABLE
GASKET
4659
3120-00-980-4763INTERCHANGEABLE
BEARING,SLEEVE
5310-01-196-3248INTERCHANGEABLE
NUT,PLAIN,HEXAGON
4659
7690-01-390-0407INTERCHANGEABLE
LABEL
4659
6680-01-487-0741INTERCHANGEABLE
INDICATOR SUBASSEMBLY,RATE OF FL
4659-02

Frequently Asked Questions

What is NSN 5950-00-309-0858?

NSN 5950-00-309-0858 is a Transformer,power, manufactured by Richmond Engineering Co Inc, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-309-0858?

NSN 5950-00-309-0858 has 2 cross-referenced part numbers: 4659 (Richmond Engineering Co Inc), 7002-0022 (Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc).

What NSN replaces 5950-00-309-0858?

There are 8 known substitutes for 5950-00-309-0858: 5310-00-146-0776, 2640-00-678-8616, 5905-00-688-9944 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4659?

Key specifications for 4659: Mounting Method: FLANGE AND SLOT SINGLE GROUP; Center to Center Distance Between Mounting Facilities Parallel to Width: 2.875 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN; Inclosure Type: OPEN; Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT. 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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