PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

677-0343-020Transformer,audio Frequency

Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems · NSN 5950-00-528-8659 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-528-8659 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-528-8659. Primary manufacturer part number: 677-0343-020.
Features
  • Transformer,audio Frequency — FSC 5950
  • Mounting Hole Diameter: 0.140 INCHES NOMINAL SINGLE GROUP IN
  • Body Width: 1.812 INCHES MAXIMUM IN
  • Inclosure Type: FULLY INCLOSED
  • Terminal Type and Quantity: 5 WIRE LEAD
  • Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
  • Maximum Transformer Power Rating: 500.0 MILLIWATTS SINGLE COMPONENT
  • Frequency Rating: 250.0 HERTZ MINIMUM AND 3.1 KILOHERTZ MAXIMUM SINGLE COMPONENT
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,audio Frequency, cataloged under National Stock Number 5950-00-528-8659, 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 Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-528-8659
Primary Part Number677-0343-020
Item NameTransformer,audio Frequency
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerRockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
StatusACTIVE
Mounting Hole Diameter0.140 INCHES NOMINAL SINGLE GROUP IN
Body Width1.812 INCHES MAXIMUM IN
Inclosure TypeFULLY INCLOSED
Terminal Type and Quantity5 WIRE LEAD
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Maximum Transformer Power Rating500.0 MILLIWATTS SINGLE COMPONENT
Frequency Rating250.0 HERTZ MINIMUM AND 3.1 KILOHERTZ MAXIMUM SINGLE COMPONENT
Mounting Facility Quantity4 SINGLE GROUP
Body Length1.219 INCHES MAXIMUM IN
Winding Shielding MethodINTERNAL SHIELD GROUNDED TO INCLOSURE AND CORE SINGLE COMPONENT
Impedance Rating in Ohms16.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Body Height0.740 INCHES MAXIMUM IN
Impedance Rating in Ohms600.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Center to Center Distance Between Mounting Facilities Parallel to Width0.650 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Center to Center Distance Between Mounting Facilities Parallel to Length1.475 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Mounting MethodFLANGE AND UNTHREADED HOLE(S) SINGLE GROUP
Reliability IndicatorNOT ESTABLISHED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5342-00-057-994244127 INTERCHANGEABLE
Mount,resilient,weapon System
L3harris Technologies, Inc.
5342-00-093-63757705148G1 INTERCHANGEABLE
Bracket
General Electric Company
5133-00-189-9302 INTERCHANGEABLE
Drill,twist
5950-00-577-3032240-0155-00 INTERCHANGEABLE
Coil,radio Frequency
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
5330-01-442-955244127 INTERCHANGEABLE
Gasket
Bourns Inc
5306-01-734-317644127 INTERCHANGEABLE
Bolt,machine
Custom Wheel Solutions, Llc Dba Custom Wheel Solutions Llc
Cross-Reference Index
Part NumberManufacturer
44127 Freed Transformer Co (USA)
677-0343-020 PRIMARY Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA)
A17161 Te Connectivity Networks, Inc. Div Adc Telecommunications Sales, Inc. (USA)
Related Parts
5342-00-057-9942INTERCHANGEABLE
MOUNT,RESILIENT,WEAPON SYSTEM
44127
5342-00-093-6375INTERCHANGEABLE
BRACKET
7705148G1
5133-00-189-9302INTERCHANGEABLE
DRILL,TWIST
5950-00-577-3032INTERCHANGEABLE
COIL,RADIO FREQUENCY
240-0155-00
5330-01-442-9552INTERCHANGEABLE
GASKET
44127
5306-01-734-3176INTERCHANGEABLE
BOLT,MACHINE
44127

Frequently Asked Questions

What is NSN 5950-00-528-8659?

NSN 5950-00-528-8659 is a Transformer,audio Frequency, manufactured by Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-528-8659?

NSN 5950-00-528-8659 has 3 cross-referenced part numbers: 44127 (Freed Transformer Co), 677-0343-020 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems), A17161 (Te Connectivity Networks, Inc. Div Adc Telecommunications Sales, Inc.).

What NSN replaces 5950-00-528-8659?

There are 6 known substitutes for 5950-00-528-8659: 5342-00-057-9942, 5342-00-093-6375, 5133-00-189-9302 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 677-0343-020?

Key specifications for 677-0343-020: Mounting Hole Diameter: 0.140 INCHES NOMINAL SINGLE GROUP IN; Body Width: 1.812 INCHES MAXIMUM IN; Inclosure Type: FULLY INCLOSED; Terminal Type and Quantity: 5 WIRE LEAD. 17 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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