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. 170-3783
Mfr. Part No.0712194
£12.737
Each (In a Box of 20)
Units
1A 1 - 65 V dc, 250 V ac 8.2mm TCP1A - - - - - - - -
RS Stock No. 801-6892
Mfr. Part No.0712194
£19.37
Each
Units
1A 1 - 65 V dc, 250 V ac 8.2mm TCP 1A - - - - - - - -
RS Stock No. 684-3585
Mfr. Part No.0916604
£15.15
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 170-3790
Mfr. Part No.0712314
£12.737
Each (In a Box of 20)
Units
10A 1 - 65 V dc, 250 V ac 8.2mm TCP 10A - - - - - - - -
RS Stock No. 801-6915
Mfr. Part No.0712314
£19.09
Each
Units
10A 1 - 65 V dc, 250 V ac 8.2mm TCP 10A - - - - - - - -
RS Stock No. 855-7393
Mfr. Part No.2800914
£31.80
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 801-6898
Mfr. Part No.0712152
£19.09
Each
Units
500mA 1 - 65 V dc, 250 V ac 8.2mm TCP 0.5A - - - - - - - -
RS Stock No. 170-3784
Mfr. Part No.0712123
£12.737
Each (In a Box of 20)
Units
250mA 1 - 65 V dc, 250 V ac 8.2mm TCP 0.25A - - - - - - - -
RS Stock No. 768-0852
Mfr. Part No.2800839
£28.24
Each
Units
4A 1 TRABTECH - 12.3mm CB TM1 4A SFB P - - - - - - - -
RS Stock No. 801-6895
Mfr. Part No.0712123
£19.09
Each
Units
250mA 1 - 65 V dc, 250 V ac 8.2mm TCP 0.25A - - - - - - - -
RS Stock No. 170-3785
Mfr. Part No.0712152
£12.737
Each (In a Box of 20)
Units
500mA 1 - 65 V dc, 250 V ac 8.2mm TCP 0.5A - - - - - - - -
RS Stock No. 161-7244
Mfr. Part No.0712233
£12.737
Each (In a Box of 20)
Units
3A - - 65 V dc, 240V ac 8.2mm - - - - - - - - -
RS Stock No. 801-6905
Mfr. Part No.0712233
£19.37
Each
Units
3A 1 - 65 V dc, 250 V ac 8.2mm TCP 3A - - - - - - - -
RS Stock No. 768-0864
Mfr. Part No.2800841
£28.24
Each
Units
6A 1 TRABTECH - 12.3mm CB TM1 6A SFB P - - - - - - - -
RS Stock No. 768-1022
Mfr. Part No.2800888
£56.50
Each
Units
12A 2 TRABTECH - 24.6mm CB TM2 12A M1 P - - - - - - - -
RS Stock No. 801-6902
Mfr. Part No.0712217
£15.88
Each
Units
2A 1 - 65 V dc, 250 V ac 8.2mm TCP 2A - - - - - - - -
RS Stock No. 170-3786
Mfr. Part No.0712217
£12.186
Each (In a Box of 20)
Units
2A 1 - 65 V dc, 250 V ac 8.2mm TCP 2A - - - - - - - -
RS Stock No. 882-2293
Mfr. Part No.0915768
£319.13
1 Box of 6
Box(es)
2A 2 - 65 V dc, 250 V ac 12.5mm TMCP 1 M1 300 2A - - - - - - - -
RS Stock No. 801-6983
Mfr. Part No.0914099
£92.83
Each
Units
2A 1 - 65 V dc, 250 V ac 12.5mm TMC 1 - - - - - - - -
RS Stock No. 684-3608
Mfr. Part No.0916610
£13.95
Each
Units
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