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.


...
Read more Read less

Filters

Viewing 1 - 20 of 85 products
Results per page
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. 782-8098
Mfr. Part No.W31-X2M1G-50
HK$300.90
Each
units
50A 1 - 50 V dc, 240 V ac 0.69in W31 - - - - - - - -
RS Stock No. 782-6565
Mfr. Part No.W28-XT1A-15
HK$29.01
Each
units
15A 1 - 32 V dc, 250 V ac 0.76in W28 - - - - - - - -
RS Stock No. 782-0882
Mfr. Part No.W23-X1A1G-50
HK$257.29
Each
units
50A 1 - 50 V dc, 250 V ac 0.69in W23 - - - - - - - -
RS Stock No. 782-6590
Mfr. Part No.W28-XQ1A-0.75
HK$66.74
Each
units
750mA 1 - 32 V dc, 250 V ac 0.76in W28 - - - - - - - -
RS Stock No. 782-0860
Mfr. Part No.W23-X1A1G-15
HK$241.77
Each
units
15A 1 - 50 V dc, 250 V ac 0.69in W23 - - - - - - - -
RS Stock No. 782-0886
Mfr. Part No.W23-X1A1G-5
HK$236.93
Each
units
5A 1 - 50 V dc, 250 V ac 0.69in W23 - - - - - - - -
RS Stock No. 782-7925
Mfr. Part No.W68-X2Q12-5
HK$553.41
Each
units
5A 2 - 277V ac 1.5in W68 - - - - - - - -
RS Stock No. 782-8094
Mfr. Part No.W31-X2M1G-40
HK$300.90
Each
units
40A 1 - 50 V dc, 240 V ac 0.69in W31 - - - - - - - -
RS Stock No. 782-0915
Mfr. Part No.W58-XB1A4A-5
HK$50.14
Each
units
5A 1 - 50 V dc, 250 V ac 0.66in W58 - - - - - - - -
RS Stock No. 782-6569
Mfr. Part No.W33-T4B1Q-10
HK$245.14
Each
units
10A 2 - 120V 21.59mm W33 - - - - - - - -
RS Stock No. 782-7940
Mfr. Part No.W23-X1A1G-1
HK$370.93
Each
units
1A 1 - 50 V dc, 250 V ac 0.69in W23 - - - - - - - -
RS Stock No. 782-7846
Mfr. Part No.W68-X2Q12-10
HK$598.08
Each
units
10A 2 - 277V ac 1.5in W68 - - - - - - - -
RS Stock No. 782-7994
Mfr. Part No.W58-XC4C12A-25
HK$75.04
Each
units
25A 1 - 50 V dc, 250 V ac 0.66in W58 - - - - - - - -
RS Stock No. 782-0864
Mfr. Part No.W23-X1A1G-20
HK$234.99
Each
units
20A 1 - 50 V dc, 250 V ac 0.69in W23 - - - - - - - -
RS Stock No. 782-7962
Mfr. Part No.W58-XB1A4A-12
HK$65.89
Each
units
12A 1 - 50 V dc, 250 V ac 0.66in W58 - - - - - - - -
RS Stock No. 782-0889
Mfr. Part No.W23-X1A1G-3
HK$370.93
Each
units
3A 1 - 50 V dc, 250 V ac 0.69in W23 - - - - - - - -
RS Stock No. 170-9405
Mfr. Part No.W28-XQ1A-10
HK$23.36
Each (In a Bag of 100)
units
10A 1 - 32 V dc, 250 V ac - W28 - - 1000 A - - - - -
RS Stock No. 782-6607
Mfr. Part No.W28-XQ1A-6
HK$28.65
Each
units
6A 1 - 32 V dc, 250 V ac 0.76in W28 - - - - - - - -
RS Stock No. 782-7899
Mfr. Part No.W92-X112-30
HK$557.92
Each
units
30A 2 - 277V ac 1.5in W92 - - - - - - - -
RS Stock No. 782-6593
Mfr. Part No.W28-XQ1A-12
HK$29.04
Each
units
12A 1 - 32 V dc, 250 V ac 0.76in W28 - - - - - - - -