PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-T-27/165Transformer,audio Frequency

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5950-01-104-4426 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-01-104-4426 — this item is cataloged by the U.S. Government under National Stock Number 5950-01-104-4426. Primary manufacturer part number: MIL-T-27/165.
Features
  • Transformer,audio Frequency — FSC 5950
  • Inclosure Type: FULLY INCLOSED
  • Winding Operating Current: 0.5 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE WINDING
  • Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
  • Body Height: 0.719 INCHES MAXIMUM IN
  • Maximum Transformer Power Rating: 200.0 MILLIWATTS SINGLE COMPONENT
  • Impedance Rating in Ohms: 800.0 MINIMUM AND 1200.0 MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
  • Maximum Operating Temp: 105.0 CELSIUS DEGC
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,audio Frequency, cataloged under National Stock Number 5950-01-104-4426, 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 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5950-01-104-4426
Primary Part NumberMIL-T-27/165
Item NameTransformer,audio Frequency
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Inclosure TypeFULLY INCLOSED
Winding Operating Current0.5 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE WINDING
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Body Height0.719 INCHES MAXIMUM IN
Maximum Transformer Power Rating200.0 MILLIWATTS SINGLE COMPONENT
Impedance Rating in Ohms800.0 MINIMUM AND 1200.0 MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
Maximum Operating Temp105.0 CELSIUS DEGC
Specification/standard Data81349-MIL-T-27/165 GOVERNMENT SPECIFICATION
Mounting MethodTERMINAL SINGLE GROUP
Test Data Document81349-MIL-T-27 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Winding Operating Current0.5 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
Body Width0.750 INCHES MAXIMUM IN
Body Length1.000 INCHES MAXIMUM IN
Frequency Rating200.0 HERTZ MINIMUM AND 20.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
Impedance Rating in Ohms20000.0 MINIMUM AND 30000.0 MAXIMUM SINGLE COMPONENT SINGLE PRIMARY
Terminal Type and Quantity4 PIN
Reliability IndicatorNOT ESTABLISHED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
5950-00-214-9989 INTERCHANGEABLE
Transformer,audio Frequency
5950-01-088-8485 INTERCHANGEABLE
Transformer,audio Frequency
5950-01-109-7164 INTERCHANGEABLE
Transformer,audio Frequency
5950-01-109-7166 INTERCHANGEABLE
Transformer,audio Frequency
5950-01-215-6942 INTERCHANGEABLE
Transformer,audio Frequency
5950-01-229-2580 INTERCHANGEABLE
Transformer,audio Frequency
5950-01-259-5204 INTERCHANGEABLE
Transformer,audio Frequency
5950-01-585-9531 INTERCHANGEABLE
Transformer,audio Frequency
Cross-Reference Index
Part NumberManufacturer
MIL-T-27/165 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
S07P United Transformer Corp Sub of Opt Industries Inc (USA)
M27/165-15 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-PRF-27/165 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
128C887H01 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA)
Related Parts
5950-00-214-9989INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
5950-01-088-8485INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
5950-01-109-7164INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
5950-01-109-7166INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
5950-01-215-6942INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
5950-01-229-2580INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
5950-01-259-5204INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
5950-01-585-9531INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY

Frequently Asked Questions

What is NSN 5950-01-104-4426?

NSN 5950-01-104-4426 is a Transformer,audio Frequency, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5950 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5950-01-104-4426?

NSN 5950-01-104-4426 has 5 cross-referenced part numbers: MIL-T-27/165 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), S07P (United Transformer Corp Sub of Opt Industries Inc), M27/165-15 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-PRF-27/165 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 128C887H01 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp).

What NSN replaces 5950-01-104-4426?

There are 8 known substitutes for 5950-01-104-4426: 5950-00-214-9989, 5950-01-088-8485, 5950-01-109-7164 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-T-27/165?

Key specifications for MIL-T-27/165: Inclosure Type: FULLY INCLOSED; Winding Operating Current: 0.5 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE WINDING; Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT; Body Height: 0.719 INCHES MAXIMUM IN. 18 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5950-01-104-4426 still in active supply?

NSN 5950-01-104-4426 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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