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. 881-8200
Mfr. Part No.1688667
PHP1,756.97
1 Box of 5
Box(es)
- - - - - VS-08-A-RJ45/LP-4-IP 20 - - - - - - - -
RS Stock No. 170-3787
Mfr. Part No.0712259
PHP843.68
Each (In a Box of 20)
units
4A 1 - 65 V dc, 250 V ac 8.2mm TCP 4A - - - - - - - -
RS Stock No. 801-6909
Mfr. Part No.0712259
PHP924.00
Each
units
4A 1 - 65 V dc, 250 V ac 8.2mm TCP 4A - - - - - - - -
RS Stock No. 768-0937
Mfr. Part No.2800862
PHP2,773.01
Each
units
5A 1 TRABTECH - 12.3mm CB TM1 5A F1 P - - - - - - - -
RS Stock No. 768-1025
Mfr. Part No.2800889
PHP5,546.40
Each
units
16A 2 TRABTECH - 24.6mm CB TM2 16A M1 P - - - - - - - -
RS Stock No. 801-6898
Mfr. Part No.0712152
PHP924.00
Each
units
500mA 1 - 65 V dc, 250 V ac 8.2mm TCP 0.5A - - - - - - - -
RS Stock No. 768-0880
Mfr. Part No.2800848
PHP2,458.28
Each
units
2A 1 TRABTECH - 12.3mm CB TM1 2A M1 P - - - - - - - -
RS Stock No. 768-1101
Mfr. Part No.2800916
PHP2,356.67
Each
units
2A 1 TRABTECH - 12.3mm CB E1 24DC/2A P - - - - - - - -
RS Stock No. 170-3784
Mfr. Part No.0712123
PHP843.15
Each (In a Box of 20)
units
250mA 1 - 65 V dc, 250 V ac 8.2mm TCP 0.25A - - - - - - - -
RS Stock No. 881-8278
Mfr. Part No.1689556
PHP68,800.00
1 Box of 10000
Box(es)
- - - - - VS-ST-CD-1.0/14.8/0.5-R - - - - - - - -
RS Stock No. 801-6905
Mfr. Part No.0712233
PHP924.00
Each
units
3A 1 - 65 V dc, 250 V ac 8.2mm TCP 3A - - - - - - - -
RS Stock No. 801-6892
Mfr. Part No.0712194
PHP924.00
Each
units
1A 1 - 65 V dc, 250 V ac 8.2mm TCP 1A - - - - - - - -
RS Stock No. 801-7003
Mfr. Part No.0914183
PHP4,509.75
Each
units
16A 1 - 65 V dc, 250 V ac 12.5mm TMC 1 - - - - - - - -
RS Stock No. 881-8155
Mfr. Part No.1688081
PHP8,113.69
1 Box of 10
Box(es)
- - - - - VS-15-ST-DSUB-ER - - - - - - - -
RS Stock No. 881-0420
Mfr. Part No.1657740
PHP3,481.95
Each
units
3A - - 125V - VS-SI-FP-DSUB15DSUB25-GC-BU/ST - - - - - - - -
RS Stock No. 881-8272
Mfr. Part No.1689569
PHP65,903.46
1 Box of 10000
Box(es)
- - - - - VS-BU-CD-1.0/14.4/0.5-R - - - - - - - -
RS Stock No. 881-8244
Mfr. Part No.1689006
PHP4,147.50
1 Box of 10
Box(es)
- - - - - VS-09-ST-DSUB-1P-4S - - - - - - - -
RS Stock No. 801-7028
Mfr. Part No.0914439
PHP4,509.75
Each
units
1A 1 - 65 V dc, 250 V ac 12.5mm TMC M1 - - - - - - - -
RS Stock No. 881-8269
Mfr. Part No.1689323
PHP2,472.93
1 Box of 10
Box(es)
- - - - - VS-PSC 1.5/5-M PE - - - - - - - -
RS Stock No. 882-2328
Mfr. Part No.0915849
PHP16,489.81
1 Box of 6
Box(es)
12A - - 65 V dc, 250 V ac - TMCP 1 M1 300 12.0A - - - - - - - -