PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3905Transformer,current

Transistor Devices Inc Dba Fernwood Magnetics Div Div Circuitek Division · NSN 5950-01-369-6123 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-01-369-6123 — this item is cataloged by the U.S. Government under National Stock Number 5950-01-369-6123. Primary manufacturer part number: 3905.
Features
  • Transformer,current — FSC 5950
  • Reliability Indicator: NOT ESTABLISHED
  • Winding Function and Quantity: 2 SECONDARY SINGLE COMPONENT
  • Body Outside Diameter: 1.250 INCHES MAXIMUM IN
  • Inclosure Type: OPEN
  • Frequency Rating: 60.0 HERTZ NOMINAL SINGLE COMPONENT
  • Terminal Type and Quantity: 4 PRINTED CIRCUIT
  • Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,current, cataloged under National Stock Number 5950-01-369-6123, 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 Transistor Devices Inc Dba Fernwood Magnetics Div Div Circuitek Division. Government technical data includes 9 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. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-01-369-6123
Primary Part Number3905
Item NameTransformer,current
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerTransistor Devices Inc Dba Fernwood Magnetics Div Div Circuitek Division
StatusACTIVE
Reliability IndicatorNOT ESTABLISHED
Winding Function and Quantity2 SECONDARY SINGLE COMPONENT
Body Outside Diameter1.250 INCHES MAXIMUM IN
Inclosure TypeOPEN
Frequency Rating60.0 HERTZ NOMINAL SINGLE COMPONENT
Terminal Type and Quantity4 PRINTED CIRCUIT
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Body Height1.350 INCHES MAXIMUM IN
Body Width0.625 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5365-00-145-50743905 INTERCHANGEABLE
Shim
Koehring Cranes, Inc Dba Terex Cranes Div Waverly Operations
3110-00-156-186272-6970-960 INTERCHANGEABLE
Bearing,ball,thrust
Fairbanks Morse, Llc
5331-00-167-5166AS3208-05 INTERCHANGEABLE
O-Ring
Sae International Dba Sae International
5330-00-399-6935VT3394 INTERCHANGEABLE
Gasket
Cnh Industrial America Llc Dba Cnh America
8010-00-943-3174 INTERCHANGEABLE
Paint,screen Process
4820-00-998-60716255000 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Mg Industries Welding Products Div
5330-01-132-65333-905 NBR INTERCHANGEABLE
Packing,preformed
Parker-Hannifin Corp Div O-Ring Division
5910-01-231-24213905 INTERCHANGEABLE
Capacitor,fixed,paper Dielectric
Chicago Condenser Corp., Inc.
7510-01-354-2334 INTERCHANGEABLE
Ink,marking Stencil
6685-01-386-65473905-G503 INTERCHANGEABLE
Sensor,humidity
Howell Laboratories Inc Dba Howell Laboratories Inc
Cross-Reference Index
Part NumberManufacturer
3905 PRIMARY Transistor Devices Inc Dba Fernwood Magnetics Div Div Circuitek Division (USA)
116379 Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit (USA)
Related Parts
5365-00-145-5074INTERCHANGEABLE
SHIM
3905
3110-00-156-1862INTERCHANGEABLE
BEARING,BALL,THRUST
72-6970-960
5331-00-167-5166INTERCHANGEABLE
O-RING
AS3208-05
5330-00-399-6935INTERCHANGEABLE
GASKET
VT3394
8010-00-943-3174INTERCHANGEABLE
PAINT,SCREEN PROCESS
4820-00-998-6071INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
6255000
5330-01-132-6533INTERCHANGEABLE
PACKING,PREFORMED
3-905 NBR
5910-01-231-2421INTERCHANGEABLE
CAPACITOR,FIXED,PAPER DIELECTRIC
3905
7510-01-354-2334INTERCHANGEABLE
INK,MARKING STENCIL
6685-01-386-6547INTERCHANGEABLE
SENSOR,HUMIDITY
3905-G503
5331-01-719-0215INTERCHANGEABLE
O-RING
8635040-08

Frequently Asked Questions

What is NSN 5950-01-369-6123?

NSN 5950-01-369-6123 is a Transformer,current, manufactured by Transistor Devices Inc Dba Fernwood Magnetics Div Div Circuitek Division, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-01-369-6123?

NSN 5950-01-369-6123 has 2 cross-referenced part numbers: 3905 (Transistor Devices Inc Dba Fernwood Magnetics Div Div Circuitek Division), 116379 (Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit).

What NSN replaces 5950-01-369-6123?

There are 11 known substitutes for 5950-01-369-6123: 5365-00-145-5074, 3110-00-156-1862, 5331-00-167-5166 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3905?

Key specifications for 3905: Reliability Indicator: NOT ESTABLISHED; Winding Function and Quantity: 2 SECONDARY SINGLE COMPONENT; Body Outside Diameter: 1.250 INCHES MAXIMUM IN; Inclosure Type: OPEN. 9 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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