PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A8557Reactor

Te Connectivity Networks, Inc. Div Adc Telecommunications Sales, Inc. · NSN 5950-00-519-7491 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-519-7491 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-519-7491. Primary manufacturer part number: A8557.
Features
  • Reactor — FSC 5950
  • Body Length: 1.500 INCHES NOMINAL IN
  • Reliability Indicator: NOT ESTABLISHED
  • Winding Quantity: 1 SINGLE COMPONENT
  • Distance Between Mounting Facility Centers: 1.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
  • Terminal Type and Quantity: 3 TAB, SOLDER LUG
  • Inclosure Type: HERMETICALLY SEALED
  • Body Outside Diameter: 1.062 INCHES NOMINAL IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Reactor, cataloged under National Stock Number 5950-00-519-7491, 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 Te Connectivity Networks, Inc. Div Adc Telecommunications Sales, Inc.. Government technical data includes 12 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-519-7491
Primary Part NumberA8557
Item NameReactor
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerTe Connectivity Networks, Inc. Div Adc Telecommunications Sales, Inc.
StatusACTIVE
Body Length1.500 INCHES NOMINAL IN
Reliability IndicatorNOT ESTABLISHED
Winding Quantity1 SINGLE COMPONENT
Distance Between Mounting Facility Centers1.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Terminal Type and Quantity3 TAB, SOLDER LUG
Inclosure TypeHERMETICALLY SEALED
Body Outside Diameter1.062 INCHES NOMINAL IN
Mounting Facility Quantity2 SINGLE GROUP
Mounting Hole Diameter0.141 INCHES NOMINAL SINGLE GROUP IN
Inductance TypeFIXED
Inductance Rating1.82 HENRY NOMINAL AND 2.80 HENRY NOMINAL SINGLE COMPONENT SINGLE WINDING
Mounting MethodUNTHREADED HOLE(S) SINGLE GROUP
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5905-00-105-7764 INTERCHANGEABLE
Resistor,fixed,composition
Cross-Reference Index
Part NumberManufacturer
A8557 Te Connectivity Networks, Inc. Div Adc Telecommunications Sales, Inc. (USA)
BC811 Ballastran Corp (USA)
BC811 Pegasus Inc (USA)
Related Parts
5905-00-105-7764INTERCHANGEABLE
RESISTOR,FIXED,COMPOSITION

Frequently Asked Questions

What is NSN 5950-00-519-7491?

NSN 5950-00-519-7491 is a Reactor, manufactured by Te Connectivity Networks, Inc. Div Adc Telecommunications Sales, Inc., classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-519-7491?

NSN 5950-00-519-7491 has 3 cross-referenced part numbers: A8557 (Te Connectivity Networks, Inc. Div Adc Telecommunications Sales, Inc.), BC811 (Ballastran Corp), BC811 (Pegasus Inc).

What NSN replaces 5950-00-519-7491?

There is 1 known substitute for 5950-00-519-7491: 5905-00-105-7764. Verify interchangeability with system specifications before substitution.

What are the specifications of A8557?

Key specifications for A8557: Body Length: 1.500 INCHES NOMINAL IN; Reliability Indicator: NOT ESTABLISHED; Winding Quantity: 1 SINGLE COMPONENT; Distance Between Mounting Facility Centers: 1.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN. 12 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com