Circuit Breakers11,468 Products
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| Image | Part Number | Manufacturer | Description | Availability | Actions | |
|---|---|---|---|---|---|---|
 PDF | 3RV20111HA150BA0 | Siemens | SPECIAL TYPE CIRCUIT BREAKER 8A | In Stock | MOQ: 1 Hover to quote | |
PDF | 3RV20111BA150BA0 | Siemens | SPECIAL TYPE CIRCUIT BREAKER 2A | In Stock | MOQ: 1 Hover to quote | |
PDF | 3RV21424HA10 | Siemens | CIRCUIT BREAKER SCREW-TYPE 50 A | In Stock | MOQ: 1 Hover to quote | |
 PDF | 3RV20211EA10 | Siemens | MSP S0 2.8 - 4A SCREW | In Stock | MOQ: 1 Hover to quote | |
 PDF | 5SJ42067HG42 | Siemens | MCB 5SJ4 2P 480/277 6A 10K C-TRI | In Stock | MOQ: 1 Hover to quote | |
 PDF | 5SJ43407HG42 | Siemens | MCB 5SJ4 3P 480/277 40A 10K C-TR | In Stock | MOQ: 1 Hover to quote | |
 PDF | 3RV27111JD10 | Siemens | TMCB UL489 S00 10A SCREW | In Stock | MOQ: 1 Hover to quote | |
 PDF | 3VA51305ED310AA0 | Siemens | BRKR 3VA51 3P 30A 35KA FTFM | In Stock | MOQ: 1 Hover to quote | |
 PDF | 5SJ41107HG40 | Siemens | MCB 5SJ4 1P 240V 10A SAME PH 14K | In Stock | MOQ: 1 Hover to quote | |
PDF | 5SJ42117HG42 | Siemens | MCB 5SJ4 2P 480/277 5A 10K C-TRI | In Stock | MOQ: 1 Hover to quote | |
 PDF | 3RV20110KA15 | Siemens | MSP S00 0.9-1.25A AUX 1NO 1NC SC | In Stock | MOQ: 1 Hover to quote | |
 PDF | 5SY41018 | Siemens | SUP PTOR 5SY4 1P 240V 1A 7.5K D- | In Stock | MOQ: 1 Hover to quote | |
 PDF | 5SJ41037HG42 | Siemens | MCB 5SJ4 1P 277V 3A 10K C-TRIP | In Stock | MOQ: 1 Hover to quote | |
 PDF | 5SJ43327HG42 | Siemens | MCB 5SJ4 3P 480/277 32A 10K C-TR | In Stock | MOQ: 1 Hover to quote | |
PDF | 3RV20210KA10 | Siemens | MSP S0 0.9 - 1.25A SCREW | In Stock | MOQ: 1 Hover to quote | |
 PDF | 5SJ42207HG41 | Siemens | STANDARD FRAME 1 POLE 240VAC | In Stock | MOQ: 1 Hover to quote | |
PDF | 3RV20211KA10 | Siemens | MSP S0 9 - 12.5A SCREW | In Stock | MOQ: 1 Hover to quote | |
 PDF | 3RV20314EB10 | Siemens | MSP S2 CLASS 20 22-32A SCREW | In Stock | MOQ: 1 Hover to quote | |
PDF | 5SJ43118HG42 | Siemens | MCB 5SJ4 3P 480/277 5A 10K D-TRI | In Stock | MOQ: 1 Hover to quote | |
 PDF | 3RV10111HA10 | Siemens | MSP,GROUP TAP,S00,CL10,5.5-8A,SC | In Stock | MOQ: 1 Hover to quote |
A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit. Its basic function is to interrupt current flow after a fault is detected. Unlike a fuse, which operates once and then must be replaced, a circuit breaker can be reset (either manually or automatically) to resume normal operation.