(!) Since support from Microsoft will end on January 14 2020, Windows 7 user might not be able to use MISUMI website effectively. Please consider to update your system as ‘MISUMI Website system requirement’.

    Sales
  • Viewed
    Products
  • My
    Components
  • Cart
Recently Viewed Products
X
My Components
X
Cart Item(s)
X
Loading...
  • Scheduled Maintenance Notice: This site will be unavailable due to scheduled maintenance from 8:00 to 20:30 6/10/2024. We apologize for the inconvenience.
  • แจ้งวันหยุดทำการในเดือน ตุลาคม 2567 | Notice holiday in October 2024 > คลิก
  • การยกเลิกจำหน่ายสินค้าประเภทอุปกรณ์นิวเมติกส์ (Pneumatic equipment) รุ่น “Economy Series”​ | Notice of End of Sales for Economy Series Pneumatic Equipment Category > คลิก

Circuit Breakers

Circuit breakers are safety devices that automatically interrupt the circuit when an excessive current is detected. Circuit breaker components include a switch mechanism, trip unit, arc chute, contacts, and more. These components are housed in a molded case with good insulation characteristics. Circuit breakers are generally called "breakers". Classifications are made by interrupting types and applications. Interrupting types can be classified into thermal magnetic, electromagnetic and electronic. Applications can be classified into safety breakers, motor breakers, 3-wire single phase neutral conductor protection breaker and JIS-compliant breakers. All types are designed for circuit protection and must be selected according to the rated current of the device to which the breaker is installed.