Thermal Magnetic Circuit Breakers

Thermal magnetic circuit breakers are devices that provide protection against overcurrent in circuits. Circuit breakers use an automatically operated electrical switch to disrupt the flow of current when an overload or short circuit is detected. Thermal magnetic circuit breakers do this using an electromagnet and bimetallic strips. 


Circuit breakers provide more sophisticated protection against overcurrent than a simple fuse. Fuses simply burn out and have to be replaced, whereas circuit breakers just need to be reset.


How do thermal magnetic circuit breakers work?

In thermal magnetic circuit breakers, there are two ways the flow of current might be detected and disrupted. In the event of a short circuit, the electromagnet rapidly trips the switch. If the overload is smaller, over a longer period of time, the bimetallic strips will instead eventually react to trip the switch. 


What are thermal magnetic circuit breakers used for?

Thermal magnetic circuit breakers are most often used in distribution boards. They make up part of the subsidiary circuits in the broader electrical supply system, protecting against overcurrent.


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Description Price Current Rating Number of Poles Range Voltage Rating Width Series Application Break Time Breaking Capacity at Maximum Voltage Rating Circuit Breaker Type Mounting Hole Diameter Mounting Hole Length Mounting Hole Size Mounting Hole Width
RS庫存編號 323-8999
製造零件編號GB2CD06
HK$536.36
單位
1A 1P + N - 250V ac 15mm GB2 - - 1 (dc) kA, 50 (ac) kA - - - - -
RS庫存編號 312-3774
製造零件編號GB2DB06
HK$757.83
單位
1A 2 - 277 V ac, 415 V ac 30mm GB2 - - 1 (dc) kA, 50 (ac) kA - - - - -
RS庫存編號 312-3780
製造零件編號GB2DB07
HK$300.06
單位
2A 2 - 277 V ac, 415 V ac 30mm GB2 - - 1 (dc) kA, 15 (ac) kA - - - - -
RS庫存編號 272-909
製造零件編號GV3P25
HK$3,421.97
單位
- 3 TeSys 690V ac 55mm GV3 - - 6 kA - - - - -
RS庫存編號 272-937
製造零件編號GV3P65
HK$1,358.62
單位
- 3 TeSys 690V ac 55mm GV3 - - 5 kA - - - - -
RS庫存編號 272-814
製造零件編號GV3L25
HK$1,413.80
單位
- 3 TeSys 690V ac 55mm GV3 - - 6 kA - - - - -
RS庫存編號 323-9009
製造零件編號GB2CD07
HK$294.43
單位
2A 1P + N - 250V ac 15mm GB2 - - 1 (dc) kA, 15 (ac) kA - - - - -
RS庫存編號 312-3768
製造零件編號GB2DB05
HK$457.60
單位
500mA 2 - 277 V ac, 415 V ac 30mm GB2 - - 1 (dc) kA, 50 (ac) kA - - - - -
RS庫存編號 272-858
製造零件編號GV3L65
HK$2,011.50
單位
- 3 TeSys 690V ac 55mm GV3 - - 5 kA - - - - -
RS庫存編號 175-1586
製造零件編號GV4PEM50N
HK$4,591.01
單位
50A 3 TeSys 690V ac 116mm GV4PEM - - 8 kA @ 660 → 690 V ac - - - - -
RS庫存編號 175-1587
製造零件編號GV4PEM50N6
HK$4,333.35
單位
50A 3 TeSys 690V ac 116mm GV4PEM - - 8 kA @ 660 → 690 V ac - - - - -
RS庫存編號 323-9015
製造零件編號GB2CD08
HK$519.94
單位
3A 1P + N - 250V ac 15mm GB2 - - 1 (dc) kA, 3 (ac) kA - - - - -
RS庫存編號 175-1588
製造零件編號GV4PEM50S
HK$5,605.62
單位
50A 3 TeSys 690V ac 116mm GV4PEM - - 10 kA @ 660 → 690 V ac - - - - -
RS庫存編號 312-3881
製造零件編號GB2DB22
HK$491.92
單位
20A 2 - 277 V ac, 415 V ac 30mm GB2 - - 1.5 kA - - - - -
RS庫存編號 175-1555
製造零件編號GV4PE80S6
HK$4,379.33
單位
80A 3 TeSys 690V ac 116mm GV4PE - - 10 kA @ 660 → 690 V ac - - - - -
RS庫存編號 175-1589
製造零件編號GV4PEM50S6
HK$5,183.93
單位
50A 3 TeSys 690V ac 116mm GV4PEM - - 10 kA @ 660 → 690 V ac - - - - -
RS庫存編號 323-9021
製造零件編號GB2CD09
HK$273.87
單位
4A 1P + N - 250V ac 15mm GB2 - - 1 (dc) kA, 3 (ac) kA - - - - -
RS庫存編號 175-1540
製造零件編號GV4PE25N
HK$3,701.17
單位
25A 3 TeSys 690V ac 116mm GV4PE - - 8 kA @ 660 → 690 V ac - - - - -
RS庫存編號 175-1449
製造零件編號GV4L80S
HK$4,126.45
單位
80A 3 TeSys 690V ac 165mm GV4L - - 10 kA @ 660 → 690 V ac - - - - -
RS庫存編號 175-1562
製造零件編號GV4PEM03S
HK$5,266.78
單位
3.5A 3 TeSys 690V ac 116mm GV4PEM - - 10 kA @ 660 → 690 V ac - - - - -