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 409-889
製造零件編號1610-21-10A
BrandETA
HK$80.79
單位
10A 1 - 32V dc 20mm 1610 - - - - - - - -
RS庫存編號 335-980
製造零件編號106-P30-000040-3A
BrandETA
HK$90.83
單位
3A 1 - - 19mm 106-P30 - - - - - - - -
RS庫存編號 782-8098
製造零件編號W31-X2M1G-50
HK$240.75
單位
50A 1 - 50 V dc, 240 V ac 0.69in W31 - - - - - - - -
RS庫存編號 323-8999
製造零件編號GB2CD06
HK$433.94
單位
1A 1P + N - 250V ac 15mm GB2 - - 1 (dc) kA, 50 (ac) kA - - - - -
RS庫存編號 273-0854
製造零件編號1658-G21-02-P10-5A
BrandETA
HK$46.21
單位
5A 1 - - 32mm 1658 - - - - - - - -
RS庫存編號 122-9319
製造零件編號3400-P10-H-SI-15A
BrandETA
HK$452.78
單位
15A 1 - - 42mm 3400 - - - - - - - -
RS庫存編號 344-5361
製造零件編號3140-F130-P7T1-SGRX-5A
BrandETA
HK$382.67
單位
5A 3 - - 61.6mm 3140 - - - - - - - -
RS庫存編號 286-4159
製造零件編號3120-F521-H7T1-W01D-16A
BrandETA
HK$286.85
單位
16A 2 - - 25mm 3120 - - - - - - - -
RS庫存編號 286-4014
製造零件編號3120-F551-H7T1-W02D-10A
BrandETA
HK$188.03
單位
10A 2 - - 25mm 3120 - - - - - - - -
RS庫存編號 458-8728
製造零件編號1180-01-6A
BrandETA
HK$126.96
單位
6A 1 - - 24.4mm 1180 - - - - - - - -
RS庫存編號 405-9157
製造零件編號2-5700-IG1-P10-DD-000040-15A
BrandETA
HK$126.86
單位
15A 1 - - 29mm 2-5700 - - - - - - - -
RS庫存編號 729-2782
製造零件編號3120-F554-P7T1-W02D-16A
BrandETA
HK$188.20
單位
16A 2 - - - 3120-F - - - - - - - -
RS庫存編號 286-4137
製造零件編號3120-F521-H7T1-W01D-10A
BrandETA
HK$230.62
單位
10A 2 - - 25mm 3120 - - - - - - - -
RS庫存編號 273-0882
製造零件編號1658-G21-02-P10-15A
BrandETA
HK$46.23
單位
15A 1 - - 32mm 1658 - - - - - - - -
RS庫存編號 729-2764
製造零件編號2-5700-IG2-P10-DD-000040-16A
BrandETA
HK$203.94
單位
16A 1 - - - 2 5700 - - - - - - - -
RS庫存編號 312-3774
製造零件編號GB2DB06
HK$295.00
單位
1A 2 - 277 V ac, 415 V ac 30mm GB2 - - 1 (dc) kA, 50 (ac) kA - - - - -
RS庫存編號 335-968
製造零件編號106-P30-000040-5A
BrandETA
HK$93.33
單位
5A 1 - - 19mm 106-P30 - - - - - - - -
RS庫存編號 409-867
製造零件編號1610-21-6A
BrandETA
HK$62.66
單位
6A 1 - 32V dc 20mm 1610 - - - - - - - -
RS庫存編號 333-265
製造零件編號201-5A
BrandETA
HK$291.02
單位
5A 1 - - 80mm 201 - - - - - - - -
RS庫存編號 122-9303
製造零件編號3400-P10-H-SI-10A
BrandETA
HK$391.79
單位
10A 1 - - 42mm 3400 - - - - - - - -