PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5621Transformer,audio Frequency

Precision Electronics, Inc · NSN 5950-00-645-7761 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-645-7761 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-645-7761. Primary manufacturer part number: 5621.
Features
  • Transformer,audio Frequency — FSC 5950
  • Impedance Rating in Ohms: 750000.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY
  • Frequency Rating: 400.0 HERTZ MAXIMUM SINGLE COMPONENT
  • Maximum Operating Temp: 105.0 CELSIUS DEGC
  • Body Outside Diameter: 1.438 INCHES NOMINAL IN
  • Mounting Method: TERMINAL SINGLE GROUP
  • Body Length: 2.156 INCHES NOMINAL IN
  • Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY 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 5950-00-645-7761, 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 Precision Electronics, Inc. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5950-00-645-7761
Primary Part Number5621
Item NameTransformer,audio Frequency
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerPrecision Electronics, Inc
StatusCANCELLED
Impedance Rating in Ohms750000.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Frequency Rating400.0 HERTZ MAXIMUM SINGLE COMPONENT
Maximum Operating Temp105.0 CELSIUS DEGC
Body Outside Diameter1.438 INCHES NOMINAL IN
Mounting MethodTERMINAL SINGLE GROUP
Body Length2.156 INCHES NOMINAL IN
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Inclosure TypeHERMETICALLY SEALED
Terminal Type and Quantity4 TAB, SOLDER LUG
Winding Shielding MethodINTERNAL SHIELD GROUNDED TO INCLOSURE SINGLE COMPONENT
Primary to Secondary Turn Ratio1 TO 10 SINGLE COMPONENT
Impedance Rating in Ohms7500.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Reliability IndicatorNOT ESTABLISHED
Transformer FunctionINPUT
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 10
6110-00-104-43415621 INTERCHANGEABLE
Protector,thermal-Overload,elect
Hdt Expeditionary Systems Inc
5905-00-141-1116 INTERCHANGEABLE
Resistor,fixed,composition
5910-00-332-0777SM-A-935135-1 INTERCHANGEABLE
Capacitor,variable,air Dielectri
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
4720-00-541-07475621 INTERCHANGEABLE
Hose,air Duct
Flexco, Inc
5998-00-545-4983 INTERCHANGEABLE
Extender Card,electronic Test
5975-00-661-1007 INTERCHANGEABLE
Box Connector,electrical
5895-00-784-3797712699-001 INTERCHANGEABLE
Core
Raytheon Company Dba Raytheon
5955-01-125-063256-2-1 INTERCHANGEABLE
Crystal Unit,quartz
Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled
4710-01-316-238356-21 INTERCHANGEABLE
Tube Assembly,metal
Chicago Faucet Co the
7025-01-523-12295621 INTERCHANGEABLE
Interface Unit,automatic Data Pr
Stingray56 Inc.
Cross-Reference Index
Part NumberManufacturer
5621 PRIMARY Precision Electronics, Inc (USA)
654904C Lockheed Martin Corporation Div Rms - Mitchel Field (USA)
Related Parts
6110-00-104-4341INTERCHANGEABLE
PROTECTOR,THERMAL-OVERLOAD,ELECT
5621
5905-00-141-1116INTERCHANGEABLE
RESISTOR,FIXED,COMPOSITION
5910-00-332-0777INTERCHANGEABLE
CAPACITOR,VARIABLE,AIR DIELECTRI
SM-A-935135-1
4720-00-541-0747INTERCHANGEABLE
HOSE,AIR DUCT
5621
5998-00-545-4983INTERCHANGEABLE
EXTENDER CARD,ELECTRONIC TEST
5975-00-661-1007INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
5895-00-784-3797INTERCHANGEABLE
CORE
712699-001
5955-01-125-0632INTERCHANGEABLE
CRYSTAL UNIT,QUARTZ
56-2-1
4710-01-316-2383INTERCHANGEABLE
TUBE ASSEMBLY,METAL
56-21
7025-01-523-1229INTERCHANGEABLE
INTERFACE UNIT,AUTOMATIC DATA PR
5621

Frequently Asked Questions

What is NSN 5950-00-645-7761?

NSN 5950-00-645-7761 is a Transformer,audio Frequency, manufactured by Precision Electronics, Inc, classified under FSC 5950 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5950-00-645-7761?

NSN 5950-00-645-7761 has 2 cross-referenced part numbers: 5621 (Precision Electronics, Inc), 654904C (Lockheed Martin Corporation Div Rms - Mitchel Field).

What NSN replaces 5950-00-645-7761?

There are 10 known substitutes for 5950-00-645-7761: 6110-00-104-4341, 5905-00-141-1116, 5910-00-332-0777 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5621?

Key specifications for 5621: Impedance Rating in Ohms: 750000.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY; Frequency Rating: 400.0 HERTZ MAXIMUM SINGLE COMPONENT; Maximum Operating Temp: 105.0 CELSIUS DEGC; Body Outside Diameter: 1.438 INCHES NOMINAL IN. 14 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5950-00-645-7761 still in active supply?

NSN 5950-00-645-7761 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.
PartsTable Design LLC · partstable.com