PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5409Transformer,power

Transistor Devices Inc Dba Fernwood Magnetics Div Div Circuitek Division · NSN 5950-01-445-6961 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-01-445-6961 — this item is cataloged by the U.S. Government under National Stock Number 5950-01-445-6961. Primary manufacturer part number: 5409.
Features
  • Transformer,power — FSC 5950
  • Winding Operating Voltage: 28.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
  • Reliability Indicator: NOT ESTABLISHED
  • Terminal Type and Quantity: 5 PIN
  • 2 verified cross-references
  • Primary manufacturer: Transistor Devices Inc Dba Fernwood Magnetics Div Div Circuitek Division
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-01-445-6961, 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 3 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
NSN5950-01-445-6961
Primary Part Number5409
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerTransistor Devices Inc Dba Fernwood Magnetics Div Div Circuitek Division
StatusACTIVE
Winding Operating Voltage28.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Reliability IndicatorNOT ESTABLISHED
Terminal Type and Quantity5 PIN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5905-00-138-4239KC11-01X4/9567 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Sensor Systems, L.l.c. Dba Sensor Systems Llc
3110-00-156-4878177009-48 INTERCHANGEABLE
Bearing,ball,annular
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5985-00-486-625120-2773 INTERCHANGEABLE
Coupler,rotary,radio Frequency
Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc
5930-00-489-01491339AS895-1 INTERCHANGEABLE
Switch,toggle
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
5330-00-498-97062478876 PC1 INTERCHANGEABLE
Packing,preformed
Minnesota Rubber Co
5355-00-559-9645L280486-1 INTERCHANGEABLE
Knob
Raytheon Company Dba Raytheon Co
5950-00-679-8892 INTERCHANGEABLE
Reactor
2520-01-048-70955406 INTERCHANGEABLE
Torque Converter,vehicular
Barney & White Auto Parts Inc
5306-01-054-45655409 INTERCHANGEABLE
Bolt,eye
Hutchinson Aerospace & Industry, Inc. Dba Vlier Div Vlier
5962-01-095-3613 INTERCHANGEABLE
Microcircuit,digital
Cross-Reference Index
Part NumberManufacturer
5409 PRIMARY Transistor Devices Inc Dba Fernwood Magnetics Div Div Circuitek Division (USA)
41658 Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit (USA)
Related Parts
5905-00-138-4239INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
KC11-01X4/9567
3110-00-156-4878INTERCHANGEABLE
BEARING,BALL,ANNULAR
177009-48
5985-00-486-6251INTERCHANGEABLE
COUPLER,ROTARY,RADIO FREQUENCY
20-2773
5930-00-489-0149INTERCHANGEABLE
SWITCH,TOGGLE
1339AS895-1
5330-00-498-9706INTERCHANGEABLE
PACKING,PREFORMED
2478876 PC1
5355-00-559-9645INTERCHANGEABLE
KNOB
L280486-1
5950-00-679-8892INTERCHANGEABLE
REACTOR
2520-01-048-7095INTERCHANGEABLE
TORQUE CONVERTER,VEHICULAR
5406
5306-01-054-4565INTERCHANGEABLE
BOLT,EYE
5409
5962-01-095-3613INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
6640-01-110-9368INTERCHANGEABLE
FILTRATION SYSTEM
5409
4720-01-122-7731INTERCHANGEABLE
HOSE ASSEMBLY,METALLIC
5409

Frequently Asked Questions

What is NSN 5950-01-445-6961?

NSN 5950-01-445-6961 is a Transformer,power, 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 5950-01-445-6961?

NSN 5950-01-445-6961 has 2 cross-referenced part numbers: 5409 (Transistor Devices Inc Dba Fernwood Magnetics Div Div Circuitek Division), 41658 (Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit).

What NSN replaces 5950-01-445-6961?

There are 12 known substitutes for 5950-01-445-6961: 5905-00-138-4239, 3110-00-156-4878, 5985-00-486-6251 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5409?

Key specifications for 5409: Winding Operating Voltage: 28.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY; Reliability Indicator: NOT ESTABLISHED; Terminal Type and Quantity: 5 PIN. 3 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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