PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

61578Transformer,audio Frequency

Thordarson Inc · NSN 5950-01-025-9237 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-01-025-9237 — this item is cataloged by the U.S. Government under National Stock Number 5950-01-025-9237. Primary manufacturer part number: 61578.
Features
  • Transformer,audio Frequency — FSC 5950
  • Nominal Thread Size: 0.138 INCHES SINGLE GROUP IN
  • Reliability Indicator: NOT ESTABLISHED
  • Thread Quantity Per Inch: 32 SINGLE GROUP
  • Impedance Rating in Ohms: 300.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY
  • Mounting Method: THREADED STUD(S) SINGLE GROUP
  • Body Width: 1.625 INCHES NOMINAL IN
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,audio Frequency, cataloged under National Stock Number 5950-01-025-9237, 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 Thordarson Inc. Government technical data includes 18 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5950-01-025-9237
Primary Part Number61578
Item NameTransformer,audio Frequency
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerThordarson Inc
StatusCANCELLED
Nominal Thread Size0.138 INCHES SINGLE GROUP IN
Reliability IndicatorNOT ESTABLISHED
Thread Quantity Per Inch32 SINGLE GROUP
Impedance Rating in Ohms300.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Mounting MethodTHREADED STUD(S) SINGLE GROUP
Body Width1.625 INCHES NOMINAL IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Mounting Facility Quantity4 SINGLE GROUP
Impedance Rating in Ohms10.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Center to Center Distance Between Mounting Facilities Parallel to Width1.188 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Body Height2.375 INCHES NOMINAL IN
Terminal Type and Quantity4 SOLDER STUD
Center to Center Distance Between Mounting Facilities Parallel to Length1.188 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Body Length1.625 INCHES NOMINAL IN
Maximum Transformer Power Rating4.0 WATTS SINGLE COMPONENT
Inclosure TypeHERMETICALLY SEALED
Frequency Rating100.0 HERTZ MINIMUM AND 4.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 4
6680-01-278-2362XM55050-33U20-2000L13-1500IL30 INTERCHANGEABLE
Transmitter,liquid Quantity
Setra Systems, Inc. Dba Gems Sensors
5315-01-282-1602 INTERCHANGEABLE
Pin,cotter
6625-01-493-546511820-1 INTERCHANGEABLE
Monitor,voltage Deviation
Creating Technology Solutions, Llc Dba Technology Research Corp Div Technology Research Corp
2510-01-548-8559 INTERCHANGEABLE
Frame Section,structural,vehicul
Cross-Reference Index
Part NumberManufacturer
61578 PRIMARY Thordarson Inc (USA)
5608-0011-001 Northrop Grumman Systems Corporation Div Es Defensive Systems Division (USA)
118201 Electronic Transformer Corp Div Electronic Transformer Corporation (USA)
Related Parts
6680-01-278-2362INTERCHANGEABLE
TRANSMITTER,LIQUID QUANTITY
XM55050-33U20-2000L13-1500IL30
5315-01-282-1602INTERCHANGEABLE
PIN,COTTER
6625-01-493-5465INTERCHANGEABLE
MONITOR,VOLTAGE DEVIATION
11820-1
2510-01-548-8559INTERCHANGEABLE
FRAME SECTION,STRUCTURAL,VEHICUL

Frequently Asked Questions

What is NSN 5950-01-025-9237?

NSN 5950-01-025-9237 is a Transformer,audio Frequency, manufactured by Thordarson Inc, classified under FSC 5950 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5950-01-025-9237?

NSN 5950-01-025-9237 has 3 cross-referenced part numbers: 61578 (Thordarson Inc), 5608-0011-001 (Northrop Grumman Systems Corporation Div Es Defensive Systems Division), 118201 (Electronic Transformer Corp Div Electronic Transformer Corporation).

What NSN replaces 5950-01-025-9237?

There are 4 known substitutes for 5950-01-025-9237: 6680-01-278-2362, 5315-01-282-1602, 6625-01-493-5465 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 61578?

Key specifications for 61578: Nominal Thread Size: 0.138 INCHES SINGLE GROUP IN; Reliability Indicator: NOT ESTABLISHED; Thread Quantity Per Inch: 32 SINGLE GROUP; Impedance Rating in Ohms: 300.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY. 18 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5950-01-025-9237 still in active supply?

NSN 5950-01-025-9237 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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