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. 284-6101
Mfr. Part No.4410.0106
BrandSchurter
€26.07
Each
units
10A 1 - 240V ac 11.5mm T12 - - - - - - - -
RS Stock No. 173-9836
Mfr. Part No.4410.0106
BrandSchurter
€15.961
Each (In a Box of 20)
units
10A 1 - 240V ac 11.5mm T12 - - - - - - - -
RS Stock No. 173-9833
Mfr. Part No.4400.0017
BrandSchurter
€5.824
Each (In a Box of 100)
units
16A 1 - 240V ac - T11 - - - - - - - -
RS Stock No. 284-5906
Mfr. Part No.4400.0017
BrandSchurter
€6.58
Each
units
16A 1 - 240V ac - T11 - - - - - - - -
RS Stock No. 868-8914
Mfr. Part No.4411.0011
BrandSchurter
€12.76
Each
units
10A 1 - 28 V dc, 240 V ac - T13 - - - - - - - -
RS Stock No. 870-1060
Mfr. Part No.TS-709-5
BrandSchurter
€2.98
Each
units
5A 1 - 32 V dc, 250 V ac - TS-709 - - 1000 A MCB 11.1mm 10.3mm 10.3 x 11.1 (Dia.)mm -
RS Stock No. 284-5849
Mfr. Part No.4400.0001
BrandSchurter
€8.56
Each
units
4A 1 - 240V ac - T11 - - - - - - - -
RS Stock No. 868-9070
Mfr. Part No.4430.0582
BrandSchurter
€1.952
Each (In a Pack of 100)
units
20A 2 - 60 V dc, 240 V ac - TA45 - - - - - - - -
RS Stock No. 868-8803
Mfr. Part No.4400.0290
BrandSchurter
€5.93
Each
units
4A 1 - - - - - - - MCB - - - -
RS Stock No. 870-1010
Mfr. Part No.TS-701-HT-15
BrandSchurter
€21.79
1 Pack of 10
Pack(s)
15A 1 - 50 V dc, 250 V ac - TS-701 - - 1000 A MCB 9.7mm 8.9mm 8.9 x 9.7 (Dia.)mm -
RS Stock No. 173-9827
Mfr. Part No.4400.005
BrandSchurter
€5.824
Each (In a Box of 100)
units
6 1 - 240V ac - T11 - - - - - - - -
RS Stock No. 284-5855
Mfr. Part No.4400.005
BrandSchurter
€10.07
Each
units
6A 1 - 240V ac - T11 - - - - - - - -
RS Stock No. 868-8879
Mfr. Part No.4404.0035
BrandSchurter
€1.725
Each (In a Pack of 100)
units
5A 1 - - - T9-711 Household Appliances, HVAC, Industrial Appliances, Medical, Power Supplies, Power Tools, Uninterruptible Power Supply - 2 kA MCB 15.9mm 13.9mm 13.9 x 15.9 (Dia.)mm -
RS Stock No. 868-8910
Mfr. Part No.4411.0010
BrandSchurter
€13.339
Each (In a Pack of 20)
units
20A 1 - - - T13-211 Household Appliances, Power Supplies, Power Tools, Uninterruptible Power Supply - 1 kA MCB 9.6mm - 9.6 (Dia.)mm -
RS Stock No. 173-9840
Mfr. Part No.4400.0025
BrandSchurter
€5.824
Each (In a Box of 100)
units
4A 1 - 240V ac - T11 - - - - - - - -
RS Stock No. 868-8917
Mfr. Part No.4411.0007
BrandSchurter
€14.498
Each (In a Pack of 20)
units
15A 1 - - - T13-211 Household Appliances, Power Supplies, Power Tools, Uninterruptible Power Supply - 1 kA MCB 9.6mm - 9.6 (Dia.)mm -
RS Stock No. 868-8908
Mfr. Part No.4410.0655
BrandSchurter
€37.438
Each (In a Pack of 20)
units
1A 1 - 28 V dc, 240 V ac - T12-211 Household Appliances, Power Supplies, Power Tools, Uninterruptible Power Supply - 1 kA MCB 9.6mm 8.9mm 8.9 x 9.6 (Dia.)mm -
RS Stock No. 870-1004
Mfr. Part No.TMF12-122R-5
BrandSchurter
€792.61
1 Pack of 20
Pack(s)
5A 1 - - - TM12-122 Household Appliances, Power Supplies, Power Tools, Uninterruptible Power Supply - 1 kA MCB 11.5mm 12mm 12 x 11.5 (Dia.)mm -
RS Stock No. 173-9830
Mfr. Part No.4400.0034
BrandSchurter
€5.824
Each (In a Box of 100)
units
16A 1 - 240V ac - T11 - - - - - - - -
RS Stock No. 284-6016
Mfr. Part No.4400.0034
BrandSchurter
€4.63
Each
units
16A 1 - 240V ac - T11 - - - - - - - -