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. 774-0042
BrandRS PRO
kr 65,20
Each
Units
5A - - - 14.1mm A-0709 - - - - - - - -
RS Stock No. 774-0045
BrandRS PRO
kr 69,27
Each
Units
6A - - 32 V dc, 240 V ac 14.1mm A-0709 - - - - - - - -
RS Stock No. 774-0039
BrandRS PRO
kr 78,56
Each
Units
16A - - - 11mm A-0709 - - - - - - - -
RS Stock No. 774-0099
BrandRS PRO
kr 32,20
Each
Units
2.2A 2 - 250V ac 6mm AN - - - - - - - -
RS Stock No. 774-0036
BrandRS PRO
kr 78,56
Each
Units
13A - - - 11mm A-0709 - - - - - - - -
RS Stock No. 774-0020
BrandRS PRO
kr 78,96
Each
Units
8A - - - 11mm A-0709 - - - - - - - -
RS Stock No. 170-9405
Mfr. Part No.W28-XQ1A-10
kr 25,424
Each (In a Bag of 100)
Units
10A 1 - 32 V dc, 250 V ac - W28 - - 1000 A - - - - -
RS Stock No. 167-5677
Mfr. Part No.W28-XQ1A-10
kr 38,38
Each
Units
10A 1 - 32 V dc, 250 V ac - W28 - - 1000 A - - - - -
RS Stock No. 801-6902
Mfr. Part No.0712217
kr 162,09
Each
Units
2A 1 - 65 V dc, 250 V ac 8.2mm TCP 2A - - - - - - - -
RS Stock No. 170-3786
Mfr. Part No.0712217
kr 154,331
Each (In a Box of 20)
Units
2A 1 - 65 V dc, 250 V ac 8.2mm TCP 2A - - - - - - - -
RS Stock No. 782-7988
Mfr. Part No.W54-XB1A4A10-20
kr 27,64
Each
Units
20A 1 - 250V ac 0.575in W54 - - - - - - - -
RS Stock No. 728-8651
Mfr. Part No.106-P10-000040-8A
BrandETA
kr 151,04
Each
Units
8A 1 - - 15.7mm 106 - - - - - - - -
RS Stock No. 417-026
Mfr. Part No.1110-F112-P1M1-16A
BrandETA
kr 225,04
Each
Units
16A 1 - - 19mm 1110 - - - - - - - -
RS Stock No. 868-9169
Mfr. Part No.4430.2078
BrandSchurter
kr 262,11
Each
Units
10A 2 - 60 V dc, 240 V ac - TA45 - - - - - - - -
RS Stock No. 782-0933
Mfr. Part No.W31-X2M1G-15
kr 315,42
Each
Units
15A 1 - 50 V dc, 240 V ac 0.69in W31 - - - - - - - -
RS Stock No. 405-9179
Mfr. Part No.2-5700-IG1-P10-DD-000040-20A
BrandETA
kr 218,84
Each
Units
20A 1 - - 15.7mm 2-5700 - - - - - - - -
RS Stock No. 728-8614
Mfr. Part No.104-PR-6A
BrandETA
kr 117,72
Each
Units
6A 1 - - 11mm 104-PR - - - - - - - -
RS Stock No. 336-012
Mfr. Part No.106-P30-000040-1A
BrandETA
kr 94,15
Each
Units
1A 1 - - 19mm 106-P30 - - - - - - - -
RS Stock No. 782-0924
Mfr. Part No.W28-XQ1A-5
kr 38,38
Each
Units
5A 1 - 32 V dc, 250 V ac 0.76in W28 - - - - - - - -
RS Stock No. 272-909
Mfr. Part No.GV3P25
kr 1 632,96
Each
Units
- 3 TeSys 690V ac 55mm GV3 - - 6 kA - - - - -