PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

STK2/4E-450ACircuit Breaker Subassembly

L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc. · NSN 5925-01-514-8777 · FSC 5925 · No Item Name Available
Verified by PartsTable
NSN 5925-01-514-8777 — this item is cataloged by the U.S. Government under National Stock Number 5925-01-514-8777. Primary manufacturer part number: STK2/4E-450A.
Features
  • Circuit Breaker Subassembly — FSC 5925
  • 2 verified cross-references
  • Primary manufacturer: L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Circuit Breaker Subassembly, cataloged under National Stock Number 5925-01-514-8777, is classified within Federal Supply Class 5925 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc.. This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameCircuit Breaker Subassembly
FSC / FSG5925 — No Item Name Available (FSG 59)
ManufacturersL3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc. (CAGE 30086)
Technical Specifications
ParameterValue
NSN5925-01-514-8777
Primary Part NumberSTK2/4E-450A
Item NameCircuit Breaker Subassembly
FSC / FSG5925 / 59 — No Item Name Available
ManufacturerL3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5925-01-478-9632ETN240410U01 INTERCHANGEABLE
Circuit Breaker
L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc.
4940-01-504-95331176-49 INTERCHANGEABLE
Parts Kit,pressure Jet Steam Cle
Insinger Machine Co
Cross-Reference Index
Part NumberManufacturer
STK2/4E-450A PRIMARY L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc. (USA)
117649 L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc. (USA)
Related Parts
5925-01-478-9632INTERCHANGEABLE
CIRCUIT BREAKER
ETN240410U01
4940-01-504-9533INTERCHANGEABLE
PARTS KIT,PRESSURE JET STEAM CLE
1176-49

Frequently Asked Questions

What is NSN 5925-01-514-8777?

NSN 5925-01-514-8777 is a Circuit Breaker Subassembly, manufactured by L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc., classified under FSC 5925 (No Item Name Available). Status: active.

What are the part numbers for NSN 5925-01-514-8777?

NSN 5925-01-514-8777 has 2 cross-referenced part numbers: STK2/4E-450A (L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc.), 117649 (L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc.).

What NSN replaces 5925-01-514-8777?

There are 2 known substitutes for 5925-01-514-8777: 5925-01-478-9632, 4940-01-504-9533. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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