PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21758Circuit Breaker

Electro Impulse Laboratory Inc Dba Electro Impulse Inc · NSN 5925-01-240-4046 · FSC 5925 · No Item Name Available
Verified by PartsTable
NSN 5925-01-240-4046 — this item is cataloged by the U.S. Government under National Stock Number 5925-01-240-4046. Primary manufacturer part number: 21758.
Features
  • Circuit Breaker — FSC 5925
  • Maximum Continuous Load Current Rating Per Pole: 20.0 AMPERES AC ALL LOCATIONS
  • Ultimate Trip Rating of Continuous Current Rating Per Pole in Percent: 125.0 ALL LOCATIONS
  • Trip Release Characteristic: TIME DELAY ALL LOCATIONS
  • Unpackaged Unit Weight: 14.000 OUNCES NOMINAL OZ
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Maximum Interrupting Capacity Current Type and Rating Per Pole in Amps: 5000.0 AC ALL LOCATIONS
  • External Actuator Linkage Arrangement: ONE, TWO, AND THREE LINKED
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Circuit Breaker, cataloged under National Stock Number 5925-01-240-4046, 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 Electro Impulse Laboratory Inc Dba Electro Impulse Inc. Government technical data includes 30 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5925-01-240-4046
Primary Part Number21758
Item NameCircuit Breaker
FSC / FSG5925 / 59 — No Item Name Available
ManufacturerElectro Impulse Laboratory Inc Dba Electro Impulse Inc
StatusACTIVE
Maximum Continuous Load Current Rating Per Pole20.0 AMPERES AC ALL LOCATIONS
Ultimate Trip Rating of Continuous Current Rating Per Pole in Percent125.0 ALL LOCATIONS
Trip Release CharacteristicTIME DELAY ALL LOCATIONS
Unpackaged Unit Weight14.000 OUNCES NOMINAL OZ
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Maximum Interrupting Capacity Current Type and Rating Per Pole in Amps5000.0 AC ALL LOCATIONS
External Actuator Linkage ArrangementONE, TWO, AND THREE LINKED
Operating Voltage Type and Rating Per Pole in Volts480.0 AC ALL LOCATIONS
Nominal Thread Size0.138 INCHES IN
Actuator FunctionTRIP-RESET
Circuit Protection TypeOVERCURRENT ALL LOCATIONS
Body Width2.250 INCHES NOMINAL IN
Arc Quenching MethodMAGNETIC BLOWOUT
Center to Center Distance Between Terminals Parallel to Length1.940 INCHES NOMINAL IN
Boss Height0.150 INCHES NOMINAL IN
Mounting Surface to Terminal End Distance2.475 INCHES NOMINAL IN
Storage TypeGENERAL PURPOSE WAREHOUSE
Pole Quantity3
Mounting Facility Type and Quantity6 THREADED HOLE(S)
Fragility FactorMODERATELY RUGGED
Distance Between Centerlines of Mounting Facilities Parallel to Body Width0.750 INCHES NOMINAL IN
Distance Between Centerlines of Mounting Facilities Parallel to Body Length2.060 INCHES NOMINAL IN
Center to Center Distance Between Terminals Parallel to Width0.750 INCHES NOMINAL IN
Thread Quantity Per Inch32
Body StyleMULTIPOLE-MULTIPLE ACTUATOR TYPE
Trip Release MethodMAGNETIC-HYDRAULIC ALL LOCATIONS
Main Contact Tripping Mechanism TypeTRIP FREE
Inclosure Protection Type for Which DesignedFUNGUS RESISTANT AND MOISTURE RESISTANT
Terminal Type and Quantity6 THREADED STUD
Frequency in Hertz50.0 OR 60.0 ALL LOCATIONS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
1650-00-120-876521758 INTERCHANGEABLE
Sensor,constant Speed
Sensata Technologies, Inc. Div Sensata Attleboro
6515-00-374-2305 INTERCHANGEABLE
Stethoscope
5935-00-827-1336 INTERCHANGEABLE
Connector,receptacle,electrical
5342-00-880-829721756 INTERCHANGEABLE
Hinge,peg
Norris Dispenser Company
5120-01-491-891721758 INTERCHANGEABLE
Socket,socket Wrench
Amron International Inc
5340-01-550-5731217-58 INTERCHANGEABLE
Base,magnetic
Mack Trucks, Inc. Dba Macungie Operations Div Lehigh Valley Operations
Cross-Reference Index
Part NumberManufacturer
21758 PRIMARY Electro Impulse Laboratory Inc Dba Electro Impulse Inc (USA)
205-111-1-66-5-203-O Sensata Technologies Maryland, Inc (USA)
Related Parts
1650-00-120-8765INTERCHANGEABLE
SENSOR,CONSTANT SPEED
21758
6515-00-374-2305INTERCHANGEABLE
STETHOSCOPE
5935-00-827-1336INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
5342-00-880-8297INTERCHANGEABLE
HINGE,PEG
21756
5120-01-491-8917INTERCHANGEABLE
SOCKET,SOCKET WRENCH
21758
5340-01-550-5731INTERCHANGEABLE
BASE,MAGNETIC
217-58

Frequently Asked Questions

What is NSN 5925-01-240-4046?

NSN 5925-01-240-4046 is a Circuit Breaker, manufactured by Electro Impulse Laboratory Inc Dba Electro Impulse Inc, classified under FSC 5925 (No Item Name Available). Status: active.

What are the part numbers for NSN 5925-01-240-4046?

NSN 5925-01-240-4046 has 2 cross-referenced part numbers: 21758 (Electro Impulse Laboratory Inc Dba Electro Impulse Inc), 205-111-1-66-5-203-O (Sensata Technologies Maryland, Inc).

What NSN replaces 5925-01-240-4046?

There are 6 known substitutes for 5925-01-240-4046: 1650-00-120-8765, 6515-00-374-2305, 5935-00-827-1336 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21758?

Key specifications for 21758: Maximum Continuous Load Current Rating Per Pole: 20.0 AMPERES AC ALL LOCATIONS; Ultimate Trip Rating of Continuous Current Rating Per Pole in Percent: 125.0 ALL LOCATIONS; Trip Release Characteristic: TIME DELAY ALL LOCATIONS; Unpackaged Unit Weight: 14.000 OUNCES NOMINAL OZ. 30 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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