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. 782-0911
Mfr. Part No.W28-XQ1A-3
PHP177.93
Each
units
3A 1 - 32 V dc, 250 V ac 0.76in W28 - - - - - - - -
RS Stock No. 782-7975
Mfr. Part No.W54-XB1A4A10-15
PHP175.24
Each
units
15A 1 - 250V ac 0.575in W54 - - - - - - - -
RS Stock No. 323-9021
Mfr. Part No.GB2CD09
PHP2,438.17
Each
units
4A 1P + N - 250V ac 15mm GB2 - - 1 (dc) kA, 3 (ac) kA - - - - -
RS Stock No. 323-8983
Mfr. Part No.GB2CD05
PHP1,535.84
Each
units
500mA 1P + N - 250V ac 15mm GB2 - - 1 (dc) kA, 50 (ac) kA - - - - -
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. 405-9141
Mfr. Part No.2-5700-IG1-P10-DD-000040-10A
BrandETA
PHP909.09
Each
units
10A 1 - - 29mm 2-5700 - - - - - - - -
RS Stock No. 173-9834
Mfr. Part No.4410.0076
BrandSchurter
PHP879.30
Each (In a Box of 20)
units
4A 1 - 240V ac - T12 - - - - - - - -
RS Stock No. 284-6088
Mfr. Part No.4410.0076
BrandSchurter
PHP874.44
Each
units
4A 1 - 240V ac - T12 - - - - - - - -
RS Stock No. 405-9157
Mfr. Part No.2-5700-IG1-P10-DD-000040-15A
BrandETA
PHP909.09
Each
units
15A 1 - - 29mm 2-5700 - - - - - - - -
RS Stock No. 782-8038
Mfr. Part No.W58-XB1A4A-6
PHP311.19
Each
units
6A 1 - 50 V dc, 250 V ac 0.66in W58 - - - - - - - -
RS Stock No. 782-6607
Mfr. Part No.W28-XQ1A-6
PHP178.70
Each
units
6A 1 - 32 V dc, 250 V ac 0.76in W28 - - - - - - - -
RS Stock No. 782-0915
Mfr. Part No.W58-XB1A4A-5
PHP275.08
Each
units
5A 1 - 50 V dc, 250 V ac 0.66in W58 - - - - - - - -
RS Stock No. 272-909
Mfr. Part No.GV3P25
PHP17,948.56
Each
units
- 3 TeSys 690V ac 55mm GV3 - - 6 kA - - - - -
RS Stock No. 782-0933
Mfr. Part No.W31-X2M1G-15
PHP1,408.12
Each
units
15A 1 - 50 V dc, 240 V ac 0.69in W31 - - - - - - - -
RS Stock No. 782-0902
Mfr. Part No.W58-XB1A4A-15
PHP307.73
Each
units
15A 1 - 50 V dc, 250 V ac 0.66in W58 - - - - - - - -
RS Stock No. 782-0927
Mfr. Part No.W58-XB1A4A-7
PHP311.19
Each
units
7A 1 - 50 V dc, 250 V ac 0.66in W58 - - - - - - - -
RS Stock No. 881-1079
Mfr. Part No.CLB-153-11A3N-B-A
PHP113.943
Each (In a Pack of 10)
units
15A 1 - - - CLB Audio Visual Equipment, Household Appliances, Marine Applications, Medical Equipment, Power Strips, Power Supplies, Transportation Time Delayed 2500 A @ 32 V dc - - 10mm 10 x 11.2mm 11.2mm
RS Stock No. 312-3689
Mfr. Part No.GB2CB12
PHP1,959.56
Each
units
6A 1 - 277 V ac, 415 V ac 15mm GB2 - - 1 (dc) kA, 1.5 (ac) kA - - - - -
RS Stock No. 335-968
Mfr. Part No.106-P30-000040-5A
BrandETA
PHP637.82
Each
units
5A 1 - - 19mm 106-P30 - - - - - - - -
RS Stock No. 405-9135
Mfr. Part No.2-5700-IG1-P10-DD-000040-7A
BrandETA
PHP802.83
Each
units
7A 1 - - 29mm 2-5700 - - - - - - - -
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