PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ESL691027Transformer,audio Frequency

Lucent Technologies Inc Corporate Headquarters · NSN 5950-00-645-5529 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-645-5529 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-645-5529. Primary manufacturer part number: ESL691027.
Features
  • Transformer,audio Frequency — FSC 5950
  • Impedance Rating in Ohms: 300.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY
  • Mounting Method: UNTHREADED HOLE(S) SINGLE GROUP
  • Mounting Facility Quantity: 3 SINGLE GROUP
  • Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
  • Terminal Type and Quantity: 4 SOLDER STUD
  • Inclosure Type: HERMETICALLY SEALED
  • Mounting Hole Diameter: 0.120 INCHES NOMINAL SINGLE GROUP IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,audio Frequency, cataloged under National Stock Number 5950-00-645-5529, 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 Lucent Technologies Inc Corporate Headquarters. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5950-00-645-5529
Primary Part NumberESL691027
Item NameTransformer,audio Frequency
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerLucent Technologies Inc Corporate Headquarters
StatusCANCELLED
Impedance Rating in Ohms300.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Mounting MethodUNTHREADED HOLE(S) SINGLE GROUP
Mounting Facility Quantity3 SINGLE GROUP
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Terminal Type and Quantity4 SOLDER STUD
Inclosure TypeHERMETICALLY SEALED
Mounting Hole Diameter0.120 INCHES NOMINAL SINGLE GROUP IN
Body Outside Diameter1.562 INCHES NOMINAL IN
Mounting Bolt Circle Diameter1.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Body Length1.562 INCHES NOMINAL IN
Primary to Secondary Turn Ratio1 TO 8 SINGLE COMPONENT
Reliability IndicatorNOT ESTABLISHED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 7
5310-00-230-2080 INTERCHANGEABLE
Washer,key
5945-00-445-08651115720 INTERCHANGEABLE
Relay,electromagnetic
Borgwarner Pds (anderson), L.l.c.
2990-00-493-7337T-5707 INTERCHANGEABLE
Muffler,exhaust
Cummins Filtration Inc.
5331-00-599-0097 INTERCHANGEABLE
O-Ring
2540-01-104-0816 INTERCHANGEABLE
Slide Assembly,inner
6665-01-520-4630 INTERCHANGEABLE
Probe,inlet
5930-01-663-302015563-GRN-SV INTERCHANGEABLE
Switch,thermostatic
Hdt Expeditionary Systems Inc
Cross-Reference Index
Part NumberManufacturer
ES691027 At and T Corp (USA)
ESL691027 American Telephone and Telegraph Co (USA)
ESL691027 Lucent Technologies Inc Dba Federal Marketing Group (USA)
ESL691027 PRIMARY Lucent Technologies Inc Corporate Headquarters (USA)
15563 Cessna Aircraft Co Arc Avionics Div (USA)
ESL691027 At and T Corp (USA)
ES691027 American Telephone and Telegraph Co (USA)
Related Parts
5310-00-230-2080INTERCHANGEABLE
WASHER,KEY
5945-00-445-0865INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
1115720
2990-00-493-7337INTERCHANGEABLE
MUFFLER,EXHAUST
T-5707
5331-00-599-0097INTERCHANGEABLE
O-RING
2540-01-104-0816INTERCHANGEABLE
SLIDE ASSEMBLY,INNER
6665-01-520-4630INTERCHANGEABLE
PROBE,INLET
5930-01-663-3020INTERCHANGEABLE
SWITCH,THERMOSTATIC
15563-GRN-SV

Frequently Asked Questions

What is NSN 5950-00-645-5529?

NSN 5950-00-645-5529 is a Transformer,audio Frequency, manufactured by Lucent Technologies Inc Corporate Headquarters, classified under FSC 5950 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5950-00-645-5529?

NSN 5950-00-645-5529 has 7 cross-referenced part numbers: ES691027 (At and T Corp), ESL691027 (American Telephone and Telegraph Co), ESL691027 (Lucent Technologies Inc Dba Federal Marketing Group), ESL691027 (Lucent Technologies Inc Corporate Headquarters), 15563 (Cessna Aircraft Co Arc Avionics Div) and 2 more.

What NSN replaces 5950-00-645-5529?

There are 7 known substitutes for 5950-00-645-5529: 5310-00-230-2080, 5945-00-445-0865, 2990-00-493-7337 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of ESL691027?

Key specifications for ESL691027: Impedance Rating in Ohms: 300.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY; Mounting Method: UNTHREADED HOLE(S) SINGLE GROUP; Mounting Facility Quantity: 3 SINGLE GROUP; Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT. 12 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5950-00-645-5529 still in active supply?

NSN 5950-00-645-5529 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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