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. 272-921
Mfr. Part No.GV3P40
PHP16,211.10
Each
units
- 3 TeSys 690V ac 55mm GV3 - - 5 kA - - - - -
RS Stock No. 272-943
Mfr. Part No.GV3P50
PHP33,281.43
Each
units
- 3 TeSys 690V ac 55mm GV3 - - 5 kA - - - - -
RS Stock No. 272-937
Mfr. Part No.GV3P65
PHP29,322.97
Each
units
- 3 TeSys 690V ac 55mm GV3 - - 5 kA - - - - -
RS Stock No. 782-0892
Mfr. Part No.W58-XB1A4A-10
PHP400.28
Each
units
10A 1 - 50 V dc, 250 V ac 0.66in W58 - - - - - - - -
RS Stock No. 782-7966
Mfr. Part No.W58-XC4C12A-15
PHP451.22
Each
units
15A 1 - 50 V dc, 250 V ac 0.66in W58 - - - - - - - -
RS Stock No. 782-8026
Mfr. Part No.W58-XC4C12A-5
PHP452.18
Each
units
5A 1 - 50 V dc, 250 V ac 0.66in W58 - - - - - - - -
RS Stock No. 336-012
Mfr. Part No.106-P30-000040-1A
BrandETA
PHP819.17
Each
units
1A 1 - - 19mm 106-P30 - - - - - - - -
RS Stock No. 312-3825
Mfr. Part No.GB2DB10
PHP3,491.86
Each
units
5A 2 - 277 V ac, 415 V ac 30mm GB2 - - 1 (dc) kA, 2 (ac) kA - - - - -
RS Stock No. 312-3645
Mfr. Part No.GB2CB07
PHP1,509.02
Each
units
2A 1 - 277 V ac, 415 V ac 15mm GB2 - - 1 (dc) kA, 15 (ac) kA - - - - -
RS Stock No. 782-7975
Mfr. Part No.W54-XB1A4A10-15
PHP219.18
Each
units
15A 1 - 250V ac 0.575in W54 - - - - - - - -
RS Stock No. 782-0911
Mfr. Part No.W28-XQ1A-3
PHP338.63
Each
units
3A 1 - 32 V dc, 250 V ac 0.76in W28 - - - - - - - -
RS Stock No. 782-8041
Mfr. Part No.W58-XB1A4A-8
PHP400.28
Each
units
8A 1 - 50 V dc, 250 V ac 0.66in W58 - - - - - - - -
RS Stock No. 405-9141
Mfr. Part No.2-5700-IG1-P10-DD-000040-10A
BrandETA
PHP1,268.61
Each
units
10A 1 - - 15.7mm 2-5700 - - - - - - - -
RS Stock No. 323-8983
Mfr. Part No.GB2CD05
PHP2,411.62
Each
units
500mA 1P + N - 250V ac 15mm GB2 - - 1 (dc) kA, 50 (ac) kA - - - - -
RS Stock No. 881-8200
Mfr. Part No.1688667
PHP1,869.00
1 Box of 5
Box(es)
- - - - - VS-08-A-RJ45/LP-4-IP 20 - - - - - - - -
RS Stock No. 284-6088
Mfr. Part No.4410.0076
BrandSchurter
PHP1,302.36
Each
units
4A 1 - 240V ac - T12 - - - - - - - -
RS Stock No. 323-9021
Mfr. Part No.GB2CD09
PHP2,954.60
Each
units
4A 1P + N - 250V ac 15mm GB2 - - 1 (dc) kA, 3 (ac) kA - - - - -
RS Stock No. 173-9834
Mfr. Part No.4410.0076
BrandSchurter
PHP1,184.017
Each (In a Box of 20)
units
4A 1 - 240V ac - T12 - - - - - - - -
RS Stock No. 782-8038
Mfr. Part No.W58-XB1A4A-6
PHP401.13
Each
units
6A 1 - 50 V dc, 250 V ac 0.66in W58 - - - - - - - -
RS Stock No. 335-968
Mfr. Part No.106-P30-000040-5A
BrandETA
PHP585.15
Each
units
5A 1 - - 19mm 106-P30 - - - - - - - -