PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20427Transformer,power

Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit · NSN 5950-01-086-1789 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-01-086-1789 — this item is cataloged by the U.S. Government under National Stock Number 5950-01-086-1789. Primary manufacturer part number: 20427.
Features
  • Transformer,power — FSC 5950
  • Body Height: 3.438 INCHES NOMINAL IN
  • Winding Operating Voltage: 220.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST PRIMARY
  • Winding Shielding Method: INTERNAL SHIELD GROUNDED TO INCLOSURE SINGLE COMPONENT
  • Winding Operating Current: 100.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
  • Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
  • Winding Function and Quantity: 2 PRIMARY AND 2 SECONDARY SINGLE COMPONENT
  • Body Length: 4.125 INCHES NOMINAL IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-01-086-1789, 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 Div Astrodyne Tdi High Power Business Unit. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, 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
NSN5950-01-086-1789
Primary Part Number20427
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerTransistor Devices Inc Div Astrodyne Tdi High Power Business Unit
StatusACTIVE
Body Height3.438 INCHES NOMINAL IN
Winding Operating Voltage220.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST PRIMARY
Winding Shielding MethodINTERNAL SHIELD GROUNDED TO INCLOSURE SINGLE COMPONENT
Winding Operating Current100.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Winding Function and Quantity2 PRIMARY AND 2 SECONDARY SINGLE COMPONENT
Body Length4.125 INCHES NOMINAL IN
Terminal Type and Quantity10 TAB, SOLDER LUG
Inclosure TypeOPEN
Winding Operating Voltage8.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY
Winding Operating Current30.0 AMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
Center to Center Distance Between Mounting Facilities Parallel to Width4.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Winding Operating Voltage25.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
Center to Center Distance Between Mounting Facilities Parallel to Length4.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Mounting Slot Width0.188 INCHES NOMINAL SINGLE GROUP IN
Frequency Rating42.0 HERTZ MINIMUM AND 63.0 HERTZ MAXIMUM SINGLE COMPONENT
Reliability IndicatorNOT ESTABLISHED
Mounting Facility Quantity4 SINGLE GROUP
Mounting MethodFLANGE AND SLOT SINGLE GROUP
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6115-00-143-581320427 INTERCHANGEABLE
Guard,air Vent
Prestolite Electric Inc
3010-00-179-082420427 INTERCHANGEABLE
Gearcase-Motor
Safran Electronics & Defense, Avionics Usa, Llc Dba Use CAGE Code 879b2 for Cataloging
4720-00-290-868320427 INTERCHANGEABLE
Hose,preformed
Gates Corporation
5130-00-435-2053 INTERCHANGEABLE
Brush,wire,rotary End
5935-00-621-290020-20PSKH INTERCHANGEABLE
Connector,plug,electrical
Winchester Interconnect Corporation Dba Winchester Interconnect Div Winchester Interconnect Rf Corporation
6210-00-776-1660 INTERCHANGEABLE
Lens,light
5330-00-936-459420-427 INTERCHANGEABLE
Gasket
Dresser Industries Inc Leroi Div
5330-01-024-7417100645 INTERCHANGEABLE
Gasket
Norris Dispenser Company
5330-01-121-837810310-09 INTERCHANGEABLE
Gasket
Silver King Refrigeration Inc.
5905-01-143-4725039-033 INTERCHANGEABLE
Resistor Network,fixed,film
Ampex Data Systems Corp Computer Products Div
Cross-Reference Index
Part NumberManufacturer
C20427 Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit (USA)
20427 PRIMARY Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit (USA)
Related Parts
6115-00-143-5813INTERCHANGEABLE
GUARD,AIR VENT
20427
3010-00-179-0824INTERCHANGEABLE
GEARCASE-MOTOR
20427
4720-00-290-8683INTERCHANGEABLE
HOSE,PREFORMED
20427
5130-00-435-2053INTERCHANGEABLE
BRUSH,WIRE,ROTARY END
5935-00-621-2900INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
20-20PSKH
6210-00-776-1660INTERCHANGEABLE
LENS,LIGHT
5330-00-936-4594INTERCHANGEABLE
GASKET
20-427
5330-01-024-7417INTERCHANGEABLE
GASKET
100645
5330-01-121-8378INTERCHANGEABLE
GASKET
10310-09
5905-01-143-4725INTERCHANGEABLE
RESISTOR NETWORK,FIXED,FILM
039-033
6650-01-260-1216INTERCHANGEABLE
APERTURE ASSEMBLY,CUVETTE LIGHT
20427
5345-01-670-6355INTERCHANGEABLE
DISK,ABRASIVE
20427

Frequently Asked Questions

What is NSN 5950-01-086-1789?

NSN 5950-01-086-1789 is a Transformer,power, manufactured by Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-01-086-1789?

NSN 5950-01-086-1789 has 2 cross-referenced part numbers: C20427 (Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit), 20427 (Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit).

What NSN replaces 5950-01-086-1789?

There are 12 known substitutes for 5950-01-086-1789: 6115-00-143-5813, 3010-00-179-0824, 4720-00-290-8683 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20427?

Key specifications for 20427: Body Height: 3.438 INCHES NOMINAL IN; Winding Operating Voltage: 220.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST PRIMARY; Winding Shielding Method: INTERNAL SHIELD GROUNDED TO INCLOSURE SINGLE COMPONENT; Winding Operating Current: 100.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY. 21 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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