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
New
RS Stock No. 212-9044
Mfr. Part No.3RV2411-0DA20
BrandSiemens
PHP5,327.94
Each
units
320mA 3 Sirius 400V ac 45mm 3RV2 - - - - - - - -
New
RS Stock No. 213-2530
Mfr. Part No.3RV2311-1GC20
BrandSiemens
PHP5,175.91
Each
units
6.3A 3 SIRIUS 690V 45mm 3RV2 - - - - - - - -
New
RS Stock No. 213-2516
Mfr. Part No.3RV2111-1HA10
BrandSiemens
PHP8,430.72
Each
units
8A 3 SIRIUS 690V 65mm 3RV2 - - - - - - - -
New
RS Stock No. 209-6953
Mfr. Part No.3RV2742-5LD10
BrandSiemens
PHP33,515.58
Each
units
60A 3 Sirius 400V ac 70mm 3RV2 - - - - - - - -
New
RS Stock No. 212-9049
Mfr. Part No.3RV2711-0JD10
BrandSiemens
PHP10,918.48
Each
units
1A 3 Sirius 400V ac 45mm 3RV2 - - - - - - - -
New
RS Stock No. 209-6952
Mfr. Part No.3RV2431-4TA10
BrandSiemens
PHP11,747.73
Each
units
17A 3 Sirius 400V ac 55mm 3RV2 - - - - - - - -
New
RS Stock No. 212-9047
Mfr. Part No.3RV2411-1KA20
BrandSiemens
PHP6,247.03
Each
units
12.5A 3 Sirius 400V ac 45mm 3RV2 - - - - - - - -
New
RS Stock No. 212-9048
Mfr. Part No.3RV2711-0FD10
BrandSiemens
PHP10,089.23
Each
units
500mA 3 Sirius 400V ac 45mm 3RV2 - - - - - - - -
New
RS Stock No. 212-9045
Mfr. Part No.3RV2411-1GA15
BrandSiemens
PHP6,813.68
Each
units
6.3A 3 Sirius 400V ac 45mm 3RV2 - - - - - - - -