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庫存編號 868-9080
製造零件編號4430.0885
BrandSchurter
HK$229.67
單位
- - - - - - - - - - - - - -
RS庫存編號 868-9184
製造零件編號4430.2295
BrandSchurter
HK$204.00
/個 (每包:20個)
單位
5 A, 500 A 2 - 60 V dc, 240 V ac - TA45 - - - - - - - -
RS庫存編號 868-9301
製造零件編號4435.0001
BrandSchurter
HK$74.36
單位
20A 1 - - - - - - - MCB - - - -
RS庫存編號 868-9305
製造零件編號4435.0002
BrandSchurter
HK$131.78
/個 (每包:10個)
單位
20A 2 - 60 V dc, 240 V ac - TA35 Cleaning Equipment, Commercial and Household Kitchen Appliances, Equipment for Construction, Industrial Appliances, Power Tools - 2 kA MCB - 34mm 34 x 26mm 26mm
RS庫存編號 868-9115
製造零件編號4430.1143
BrandSchurter
HK$204.00
/個 (每包:20個)
單位
1A 2 - 60 V dc, 240 V ac - TA45 - - - - - - - -
RS庫存編號 868-9308
製造零件編號4430.3891
BrandSchurter
HK$204.00
/個 (每包:20個)
單位
1A 2 - 60 V dc, 240 V ac - TA45 - - - - - - - -
RS庫存編號 868-9345
製造零件編號4435.0036
BrandSchurter
HK$74.36
單位
7A 1 - - - - - - - MCB - - - -
RS庫存編號 284-6088
製造零件編號4410.0076
BrandSchurter
HK$178.35
單位
4A 1 - 240V ac - T12 - - - - - - - -
RS庫存編號 870-0997
製造零件編號TMF12-122R-1
BrandSchurter
HK$431.145
/個 (每包:20個)
單位
1A 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庫存編號 284-5805
製造零件編號4400.0056
BrandSchurter
HK$70.81
單位
1.5A 1 - 240V ac - T11 - - - - - - - -
RS庫存編號 173-9812
製造零件編號4400.0008
BrandSchurter
HK$51.213
個 (以毎盒:100)
單位
1A 1 - 240V ac - T11 - - - - - - - -
RS庫存編號 173-8072
製造零件編號4404.0096
BrandSchurter
HK$23.489
個 (以毎盒:100)
單位
3A 1 - 48 V dc, 240 V ac 19mm T9 - - - - - - - -
RS庫存編號 174-5489
製造零件編號3-104-513
BrandSchurter
HK$24.524
個 (以毎袋:5)
單位
100mA - - 60V dc 6.5mm RTS - - 400 A - - - - -
RS庫存編號 868-9311
製造零件編號4435.0007
BrandSchurter
HK$60.52
單位
20A 1 - 32 V dc, 240 V ac - TA35 Cleaning Equipment, Commercial and Household Kitchen Appliances, Equipment for Construction, Industrial Appliances, Power Tools - 2 kA MCB - 34mm 34 x 14.5mm 14.5mm
RS庫存編號 173-9851
製造零件編號4411.0027
BrandSchurter
HK$143.422
個 (以毎盒:20)
單位
30A 1 - 240V ac 11.5mm T13 - - - - - - - -
RS庫存編號 869-2705
製造零件編號4435.0053
BrandSchurter
HK$8.64
/個 (每包:50個)
單位
- 2 - - - TA35 - - - - 2.5mm - 2.5 (Dia.)mm -
RS庫存編號 868-8829
製造零件編號4404.0019
BrandSchurter
HK$17.149
/個 (每包:10個)
單位
4A 1 - - - T9-311 Household Appliances, HVAC, Industrial Appliances, Medical, Power Supplies, Power Tools, Uninterruptible Power Supply - 2 kA MCB 9.6mm 8.9mm 8.9 x 9.6 (Dia.)mm -
RS庫存編號 868-9119
製造零件編號4430.1172
BrandSchurter
HK$15.23
/個 (每包:100個)
單位
- 2 - - - TA45 - - - - - - - -
RS庫存編號 868-8844
製造零件編號4404.0023
BrandSchurter
HK$17.411
/個 (每包:100個)
單位
12A 1 - - - T9-311 Household Appliances, HVAC, Industrial Appliances, Medical, Power Supplies, Power Tools, Uninterruptible Power Supply - 2 kA MCB 9.6mm 8.9mm 8.9 x 9.6 (Dia.)mm -
RS庫存編號 868-9147
製造零件編號4430.1564
BrandSchurter
HK$366.358
/個 (每包:14個)
單位
5A 2 - 60 V dc, 240 V ac - TA45-2RU Industrial Appliances, Power Supplies, Power Tools - 1 kA MCB - - - 21.7mm