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
PHP1,869.00
1 Box of 5
Box(es)
- - - - - VS-08-A-RJ45/LP-4-IP 20 - - - - - - - -
RS Stock No. 801-6909
Mfr. Part No.0712259
PHP942.48
Each
units
4A 1 - 65 V dc, 250 V ac 8.2mm TCP 4A - - - - - - - -
RS Stock No. 170-3787
Mfr. Part No.0712259
PHP828.556
Each (In a Box of 20)
units
4A 1 - 65 V dc, 250 V ac 8.2mm TCP 4A - - - - - - - -
RS Stock No. 885-6261
Mfr. Part No.3000763
PHP19,648.47
1 Box of 6
Box(es)
- - - - - - - - - - - - - -
RS Stock No. 768-0937
Mfr. Part No.2800862
PHP2,267.56
Each
units
5A 1 TRABTECH - 12.3mm CB TM1 5A F1 P - - - - - - - -
RS Stock No. 855-7359
Mfr. Part No.0912020
PHP34,691.42
1 Box of 5
Box(es)
- - - - - - - - - - - - - -
RS Stock No. 855-7393
Mfr. Part No.2800914
PHP2,840.89
Each
units
- - - - - - - - - - - - - -
RS Stock No. 855-7352
Mfr. Part No.0911047
PHP34,554.80
1 Box of 5
Box(es)
- - - - - - - - - - - - - -
RS Stock No. 881-8203
Mfr. Part No.1688638
PHP1,588.04
1 Box of 5
Box(es)
- - - - - VS-08-T-RJ45/IP 20 - - - - - - - -
RS Stock No. 881-8262
Mfr. Part No.1689336
PHP193.861
Each (In a Box of 10)
units
- - - - - VS-PSC 1.5/3-M PE - - - - - - - -
RS Stock No. 881-8244
Mfr. Part No.1689006
PHP407.317
Each (In a Box of 10)
units
- - - - - VS-09-ST-DSUB-1P-4S - - - - - - - -
RS Stock No. 881-8196
Mfr. Part No.1688418
PHP246.452
Each (In a Box of 10)
units
- - - - - VS-09-ST-DSUB-2P - - - - - - - -
RS Stock No. 768-0880
Mfr. Part No.2800848
PHP2,463.48
Each
units
2A 1 TRABTECH - 12.3mm CB TM1 2A M1 P - - - - - - - -
New
RS Stock No. 201-6424
Mfr. Part No.2800849
PHP1,694.89
Each
units
3A 1 Trabtech 50V dc 12.3mm CB TM1 - - - - - - - -
RS Stock No. 170-3789
Mfr. Part No.0712291
PHP828.036
Each (In a Box of 20)
units
8A 1 - 65 V dc, 250 V ac 8.2mm TCP 8A - - - - - - - -
New
RS Stock No. 201-6242
Mfr. Part No.2800838
PHP1,694.89
Each
units
3A 1 Trabtech 50V dc 12.3mm CB TM1 - - - - - - - -
RS Stock No. 801-6898
Mfr. Part No.0712152
PHP907.43
Each
units
500mA 1 - 65 V dc, 250 V ac 8.2mm TCP 0.5A - - - - - - - -
RS Stock No. 855-7361
Mfr. Part No.0912034
PHP34,554.80
1 Box of 5
Box(es)
- - - - - - - - - - - - - -
RS Stock No. 170-3791
Mfr. Part No.0712275
PHP828.036
Each (In a Box of 20)
units
6A 1 - 65 V dc, 250 V ac 8.2mm TCP 6A - - - - - - - -
RS Stock No. 881-8272
Mfr. Part No.1689569
PHP72,216.00
1 Box of 10000
Box(es)
- - - - - VS-BU-CD-1.0/14.4/0.5-R - - - - - - - -