PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

434166-1Circuit Breaker

Mission Systems Davenport Inc. · NSN 5925-00-869-6385 · FSC 5925 · No Item Name Available
Verified by PartsTable
NSN 5925-00-869-6385 — this item is cataloged by the U.S. Government under National Stock Number 5925-00-869-6385. Primary manufacturer part number: 434166-1.
Features
  • Circuit Breaker — FSC 5925
  • Body Style: RECTANGULAR DIMENSIONAL ENVELOPE
  • Manual Actuator Type and Quantity: 1 TOGGLE
  • Specification/standard Data: 81348-W-C-375/11 GOVERNMENT SPECIFICATION
  • Inclosure Protection Type for Which Designed: FUNGUS RESISTANT
  • Trip Delay Time in Seconds Per Rated Continuous Current: 100.000 MINIMUM AT 200 PCT AND 190.000 MAXIMUM AT 200 PCT ALL LOCATIONS
  • Material: PLASTIC CASE
  • Frequency in Hertz: 60.0 ALL LOCATIONS
Applications
  • Applications requiring Plastic Case construction
General Description

The Circuit Breaker, cataloged under National Stock Number 5925-00-869-6385, 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 Mission Systems Davenport Inc.. Government technical data includes 25 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5925-00-869-6385
Primary Part Number434166-1
Item NameCircuit Breaker
FSC / FSG5925 / 59 — No Item Name Available
ManufacturerMission Systems Davenport Inc.
StatusACTIVE
Body StyleRECTANGULAR DIMENSIONAL ENVELOPE
Manual Actuator Type and Quantity1 TOGGLE
Specification/standard Data81348-W-C-375/11 GOVERNMENT SPECIFICATION
Inclosure Protection Type for Which DesignedFUNGUS RESISTANT
Trip Delay Time in Seconds Per Rated Continuous Current100.000 MINIMUM AT 200 PCT AND 190.000 MAXIMUM AT 200 PCT ALL LOCATIONS
MaterialPLASTIC CASE
Frequency in Hertz60.0 ALL LOCATIONS
Maximum Continuous Load Current Rating Per Pole90.0 AMPERES AC AND 90.0 AMPERES DC ALL LOCATIONS
Trip Release CharacteristicTIME DELAY ALL LOCATIONS
Reset MethodMANUAL
Test Data Document81348-W-C-375 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Trip Release Ambient Temp Rating40.0 CELSIUS MAXIMUM ALL LOCATIONS DEGC
Ultimate Trip Rating of Continuous Current Rating Per Pole in Percent125.0 ALL LOCATIONS
Actuator Position DesignationBETWEEN POLE ONE AND TWO
Actuator FunctionTRIP-RESET
Main Contact Tripping Mechanism TypeTRIP FREE
Terminal Type and Quantity4 COMPRESSION
Operating Voltage Type and Rating Per Pole in Volts240.0 AC AND 125.0 DC ALL LOCATIONS
Maximum Interrupting Capacity Current Type and Rating Per Pole in Amps7500.0 AC AND 5000.0 DC ALL LOCATIONS
Circuit Protection TypeOVERCURRENT ALL LOCATIONS
Trip Release MethodTHERMAL-MAGNETIC ALL LOCATIONS
Unthreaded Mounting Hole Diameter0.187 INCHES NOMINAL IN
Storage TypeGENERAL PURPOSE WAREHOUSE
Pole Quantity2
Mounting Facility Type and Quantity2 UNTHREADED HOLE(S)
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5925-01-093-3388 INTERCHANGEABLE
Circuit Breaker
5925-01-107-4986 INTERCHANGEABLE
Circuit Breaker
5925-01-136-2235 INTERCHANGEABLE
Circuit Breaker
5925-01-194-9452 INTERCHANGEABLE
Circuit Breaker
5925-01-211-9812 INTERCHANGEABLE
Circuit Breaker
5925-01-221-0334 INTERCHANGEABLE
Circuit Breaker
5925-01-259-4725 INTERCHANGEABLE
Circuit Breaker
5925-01-265-7700 INTERCHANGEABLE
Circuit Breaker
5925-01-294-5707 INTERCHANGEABLE
Circuit Breaker
5925-01-295-2227 INTERCHANGEABLE
Circuit Breaker
Cross-Reference Index
Part NumberManufacturer
434166-1 Mission Systems Davenport Inc. (USA)
TE122090WL General Electric Co Outdoor Breaker Business Section (USA)
WC375/11-013 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
TEB122090 General Electric Co Electrical Distribution and Control (USA)
W-C-375/11 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5925-01-093-3388INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-107-4986INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-136-2235INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-194-9452INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-211-9812INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-221-0334INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-259-4725INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-265-7700INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-294-5707INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-295-2227INTERCHANGEABLE
CIRCUIT BREAKER

Frequently Asked Questions

What is NSN 5925-00-869-6385?

NSN 5925-00-869-6385 is a Circuit Breaker, manufactured by Mission Systems Davenport Inc., classified under FSC 5925 (No Item Name Available). Status: active.

What are the part numbers for NSN 5925-00-869-6385?

NSN 5925-00-869-6385 has 5 cross-referenced part numbers: 434166-1 (Mission Systems Davenport Inc.), TE122090WL (General Electric Co Outdoor Breaker Business Section), WC375/11-013 (Federal Specifications Promulgated by General Services Administration Washington DC), TEB122090 (General Electric Co Electrical Distribution and Control), W-C-375/11 (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5925-00-869-6385?

There are 10 known substitutes for 5925-00-869-6385: 5925-01-093-3388, 5925-01-107-4986, 5925-01-136-2235 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 434166-1?

Key specifications for 434166-1: Body Style: RECTANGULAR DIMENSIONAL ENVELOPE; Manual Actuator Type and Quantity: 1 TOGGLE; Specification/standard Data: 81348-W-C-375/11 GOVERNMENT SPECIFICATION; Inclosure Protection Type for Which Designed: FUNGUS RESISTANT. 28 total characteristics are documented in the Federal Logistics Information System.

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