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 Stock No. 801-6909
Mfr. Part No.0712259
SGD27.35
Each
units
4A 1 - 65 V dc, 250 V ac 8.2mm TCP 4A - - - - - - - -
RS Stock No. 170-3787
Mfr. Part No.0712259
SGD24.969
Each (In a Box of 20)
units
4A 1 - 65 V dc, 250 V ac 8.2mm TCP 4A - - - - - - - -
RS Stock No. 801-6918
Mfr. Part No.0712275
SGD22.20
Each
units
6A 1 - 65 V dc, 250 V ac 8.2mm TCP 6A - - - - - - - -
RS Stock No. 801-6892
Mfr. Part No.0712194
SGD29.27
Each
units
1A 1 - 65 V dc, 250 V ac 8.2mm TCP 1A - - - - - - - -
RS Stock No. 170-3791
Mfr. Part No.0712275
SGD24.959
Each (In a Box of 20)
units
6A 1 - 65 V dc, 250 V ac 8.2mm TCP 6A - - - - - - - -
RS Stock No. 801-6898
Mfr. Part No.0712152
SGD28.20
Each
units
500mA 1 - 65 V dc, 250 V ac 8.2mm TCP 0.5A - - - - - - - -
RS Stock No. 170-3785
Mfr. Part No.0712152
SGD24.959
Each (In a Box of 20)
units
500mA 1 - 65 V dc, 250 V ac 8.2mm TCP 0.5A - - - - - - - -
RS Stock No. 170-3783
Mfr. Part No.0712194
SGD25.127
Each (In a Box of 20)
units
1A 1 - 65 V dc, 250 V ac 8.2mm TCP1A - - - - - - - -
RS Stock No. 855-7399
Mfr. Part No.2800913
SGD88.40
Each
units
- - - - - - - - - - - - - -
RS Stock No. 768-0880
Mfr. Part No.2800848
SGD74.25
Each
units
2A 1 TRABTECH - 12.3mm CB TM1 2A M1 P - - - - - - - -
RS Stock No. 801-6902
Mfr. Part No.0712217
SGD28.03
Each
units
2A 1 - 65 V dc, 250 V ac 8.2mm TCP 2A - - - - - - - -
RS Stock No. 801-6915
Mfr. Part No.0712314
SGD30.91
Each
units
10A 1 - 65 V dc, 250 V ac 8.2mm TCP 10A - - - - - - - -
RS Stock No. 801-6987
Mfr. Part No.0914125
SGD133.49
Each
units
4A 1 - 65 V dc, 250 V ac 12.5mm TMC 1 - - - - - - - -
RS Stock No. 170-3786
Mfr. Part No.0712217
SGD24.801
Each (In a Box of 20)
units
2A 1 - 65 V dc, 250 V ac 8.2mm TCP 2A - - - - - - - -
RS Stock No. 170-3790
Mfr. Part No.0712314
SGD24.959
Each (In a Box of 20)
units
10A 1 - 65 V dc, 250 V ac 8.2mm TCP 10A - - - - - - - -
RS Stock No. 885-6252
Mfr. Part No.3000762
SGD85.18
1 Box of 10
Box(es)
- - - - - - - - - - - - - -
RS Stock No. 801-6983
Mfr. Part No.0914099
SGD133.49
Each
units
2A 1 - 65 V dc, 250 V ac 12.5mm TMC 1 - - - - - - - -
RS Stock No. 882-2328
Mfr. Part No.0915849
SGD774.30
1 Box of 6
Box(es)
12A - - 65 V dc, 250 V ac - TMCP 1 M1 300 12.0A - - - - - - - -
RS Stock No. 855-7393
Mfr. Part No.2800914
SGD88.40
Each
units
- - - - - - - - - - - - - -
RS Stock No. 855-7361
Mfr. Part No.0912034
SGD907.52
1 Box of 5
Box(es)
- - - - - - - - - - - - - -