PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ER500Transformer,audio Frequency

United Transformer Corp Sub of Opt Industries Inc · NSN 5950-01-070-5899 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-01-070-5899 — this item is cataloged by the U.S. Government under National Stock Number 5950-01-070-5899. Primary manufacturer part number: ER500.
Features
  • Transformer,audio Frequency — FSC 5950
  • Winding Operating Current: 500.0 MICROAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY
  • Test Data Document: 81349-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.).
  • Body Length: 0.469 INCHES MAXIMUM IN
  • Impedance Rating in Ohms: 800.0 MINIMUM AND 1200.0 MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
  • Mounting Method: TERMINAL SINGLE GROUP
  • Specification/standard Data: 81349-MIL-T-27/172 GOVERNMENT SPECIFICATION
  • Impedance Rating in Ohms: 20000.0 MINIMUM AND 30000.0 MAXIMUM SINGLE COMPONENT SINGLE PRIMARY
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,audio Frequency, cataloged under National Stock Number 5950-01-070-5899, 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 United Transformer Corp Sub of Opt Industries Inc. Government technical data includes 16 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-01-070-5899
Primary Part NumberER500
Item NameTransformer,audio Frequency
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerUnited Transformer Corp Sub of Opt Industries Inc
StatusACTIVE
Winding Operating Current500.0 MICROAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY
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.).
Body Length0.469 INCHES MAXIMUM IN
Impedance Rating in Ohms800.0 MINIMUM AND 1200.0 MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
Mounting MethodTERMINAL SINGLE GROUP
Specification/standard Data81349-MIL-T-27/172 GOVERNMENT SPECIFICATION
Impedance Rating in Ohms20000.0 MINIMUM AND 30000.0 MAXIMUM SINGLE COMPONENT SINGLE PRIMARY
Maximum Transformer Power Rating50.0 MILLIWATTS SINGLE COMPONENT
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Maximum Operating Temp105.0 CELSIUS DEGC
Primary to Secondary Turn Ratio1 TO 1 SINGLE COMPONENT
Frequency Rating300.0 HERTZ MINIMUM AND 20.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
Terminal Type and Quantity6 WIRE LEAD
Inclosure TypeFULLY INCLOSED
Body Outside Diameter0.344 INCHES MAXIMUM IN
Reliability IndicatorNOT ESTABLISHED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5950-00-648-4412D0-T23 INTERCHANGEABLE
Transformer,audio Frequency
Magnetika Inc
Cross-Reference Index
Part NumberManufacturer
ER500 United Transformer Corp Sub of Opt Industries Inc (USA)
MIL-T-27/172 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-PRF-27/172 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
M27/172-39 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
677-1511-000 Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA)
Related Parts
5950-00-648-4412INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
D0-T23

Frequently Asked Questions

What is NSN 5950-01-070-5899?

NSN 5950-01-070-5899 is a Transformer,audio Frequency, manufactured by United Transformer Corp Sub of Opt Industries Inc, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-01-070-5899?

NSN 5950-01-070-5899 has 5 cross-referenced part numbers: ER500 (United Transformer Corp Sub of Opt Industries Inc), MIL-T-27/172 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-PRF-27/172 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), M27/172-39 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 677-1511-000 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems).

What NSN replaces 5950-01-070-5899?

There is 1 known substitute for 5950-01-070-5899: 5950-00-648-4412. Verify interchangeability with system specifications before substitution.

What are the specifications of ER500?

Key specifications for ER500: Winding Operating Current: 500.0 MICROAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY; Test Data Document: 81349-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.).; Body Length: 0.469 INCHES MAXIMUM IN; Impedance Rating in Ohms: 800.0 MINIMUM AND 1200.0 MAXIMUM SINGLE COMPONENT SINGLE SECONDARY. 16 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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