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Used Miniature Circuit Breakers (Mcb)

  • Siemens 5SY4330-7 Miniature Circuit Breaker,

    Siemens 5SY4330-7 Miniature Circuit Breaker, 400V. 4D-48

    • Manufacturer: Siemens

    Items are spares/engineering demo hookups that were pulled from an industrial working environment. We repair all types of industrial automation including AC Servo Drives, Servo Motors, Operator Interface Panels, ...

    $198 USD
    Duncan, SC
  • SIEMENS 5SY4 308-7 Miniature Circuit

    SIEMENS 5SY4 308-7 Miniature Circuit Breaker, 400V. 4D-48

    • Manufacturer: Siemens

    Items are spares/engineering demo hookups that were pulled from an industrial working environment. We repair all types of industrial automation including AC Servo Drives, Servo Motors, Operator Interface Panels, ...

    $75 USD
    Duncan, SC
  • Siemens 5SY4302-7 MCB C2 Circuit

    Siemens 5SY4302-7 MCB C2 Circuit Breaker, 400V. 4B-51

    • Manufacturer: Siemens

    Items are spares/engineering demo hookups that were pulled from an industrial working environment. We repair all types of industrial automation including AC Servo Drives, Servo Motors, Operator Interface Panels, ...

    $25 USD
    Duncan, SC
  • SIEMENS 5SY4303-7 MCB C3 Circuit

    SIEMENS 5SY4303-7 MCB C3 Circuit Breaker, 400V. 4B-51

    • Manufacturer: Siemens

    Items are spares/engineering demo hookups that were pulled from an industrial working environment. We repair all types of industrial automation including AC Servo Drives, Servo Motors, Operator Interface Panels, ...

    $30 USD
    Duncan, SC
  • Trusted Seller
    LOT OF 8 - Square

    LOT OF 8 - Square D QO120 120/240V Plug-in Miniature Circuit Breaker STOCK G738A 785901400103

    • Manufacturer: Square D
    • Model: QO120

    Number of ports: 10 | Upc: 0785901400103 | Mounting style: Plug-In | Type: Miniature Circuit Breaker | Break time: Instantaneous | Voltage: 120/240 Vac, 48 VDC | Current rating: 20A | Number of poles: 1

    $100 USD
    Montgomeryville, PA
  • SIEMENS 5SY43 MCB C3 CIRCUIT

    SIEMENS 5SY43 MCB C3 CIRCUIT BREAKER, 3 POLE, 400V. 4B-51

    • Manufacturer: Siemens

    Items are spares/engineering demo hookups that were pulled from an industrial working environment. We repair all types of industrial automation including AC Servo Drives, Servo Motors, Operator Interface Panels, ...

    $25 USD
    Duncan, SC
  • Trusted Seller
    Cutler-Hammer WMS2C60 Miniature Circuit Breaker,

    Cutler-Hammer WMS2C60 Miniature Circuit Breaker, 2-Pole, 60A, 415V

    • Manufacturer: Cutler-Hammer

    PLEASE REVIEW: We would ask that potential buyers please view the photographs carefully, and understand what you are buying. All questions should be submitted PRIOR to making your purchase. *Your purchase include...

    $25 USD
    Suwanee, GA
  • Siemens 5SY4230-7 MCB C30 Circuit

    Siemens 5SY4230-7 MCB C30 Circuit Breaker, 400V, 2 Pole. 4B-50

    • Manufacturer: Siemens

    Items are spares/engineering demo hookups that were pulled from an industrial working environment. We repair all types of industrial automation including AC Servo Drives, Servo Motors, Operator Interface Panels, ...

    $20 USD
    Duncan, SC
  • Siemens 5SY62 MCB D6 Circuit

    Siemens 5SY62 MCB D6 Circuit Breaker. 4C-18

    • Manufacturer: Siemens

    Siemens 5SY62 MCB D6 Circuit Breaker. 4C-18 We repair all types of industrial automation including AC Servo Drives, Servo Motors, Operator Interface Panels, PLC's, Sensors, Process Controls and Timers. Palmetto ...

    $39 USD
    Duncan, SC
  • Siemens 5SY63 MCB D32 Circuit

    Siemens 5SY63 MCB D32 Circuit Breaker. 4C-21

    • Manufacturer: Siemens

    Siemens 5SY63 MCB D32 Circuit Breaker. 4C-21 We repair all types of industrial automation including AC Servo Drives, Servo Motors, Operator Interface Panels, PLC's, Sensors, Process Controls and Timers. Palmet...

    $39 USD
    Duncan, SC
  • Siemens 5SY63 MCB D4 Circuit

    Siemens 5SY63 MCB D4 Circuit Breaker. 4C-17

    • Manufacturer: Siemens

    Siemens 5SY63 MCB D4 Circuit Breaker. 4C-17 We repair all types of industrial automation including AC Servo Drives, Servo Motors, Operator Interface Panels, PLC's, Sensors, Process Controls and Timers. Palmetto A...

    $53 USD
    Duncan, SC
  • Siemens 5SY43 MCB C6 Circuit

    Siemens 5SY43 MCB C6 Circuit Breaker w/5ST301 AS Auxiliary Switch. 4B-51

    • Manufacturer: Siemens

    Items are spares/engineering demo hookups that were pulled from an industrial working environment. We repair all types of industrial automation including AC Servo Drives, Servo Motors, Operator Interface Panels, ...

    $20 USD
    Duncan, SC
  • Siemens 5SY63 MCB D25 Circuit

    Siemens 5SY63 MCB D25 Circuit Breaker. 4C-19

    • Manufacturer: Siemens

    Siemens 5SY63 MCB D25 Circuit Breaker. 4C-19 We repair all types of industrial automation including AC Servo Drives, Servo Motors, Operator Interface Panels, PLC's, Sensors, Process Controls and Timers. Palmet...

    $31 USD
    Duncan, SC
  • Siemens 5SY41 MCB A4 Circuit

    Siemens 5SY41 MCB A4 Circuit Breaker w/5ST3010 AS Auxiliary Switch. 4B-51

    • Manufacturer: Siemens

    Items are spares/engineering demo hookups that were pulled from an industrial working environment. We repair all types of industrial automation including AC Servo Drives, Servo Motors, Operator Interface Panels, ...

    $20 USD
    Duncan, SC
  • Siemens 5SY41 MCB C2 Circuit

    Siemens 5SY41 MCB C2 Circuit Breaker w/5ST3010 AS Auxiliary Switch. 4B-51

    • Manufacturer: Siemens

    Items are spares/engineering demo hookups that were pulled from an industrial working environment. We repair all types of industrial automation including AC Servo Drives, Servo Motors, Operator Interface Panels, ...

    $20 USD
    Duncan, SC
23456

Overview

Circuit breakers are essential safety devices that protect electrical circuits from damage caused by overloads or short circuits. They automatically interrupt the flow of electricity when a fault is detected, preventing potential fires and equipment damage. Circuit breakers are used in residential, commercial, and industrial settings to ensure electrical safety and reliability.

FAQ

What should I consider when buying a used circuit breaker?

Check the breaker’s amperage rating, compatibility with your electrical system, and overall condition. Ensure it has been tested and certified for safety.

How do I ensure the circuit breaker is shipped safely to my location?

Use a transport service that specializes in delicate electrical components. Ensure the breaker is well-packaged and cushioned to prevent damage during transit.

What is the maintenance schedule for a circuit breaker?

Regular maintenance includes visual inspections for signs of wear or damage, testing for proper operation, and cleaning any dust or debris from the breaker. Consult the manufacturer’s manual for detailed maintenance intervals.