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 881-1328
製造零件編號EA3-B0-24-810-22A-DC
HK$749.30
單位
100A 3 - - - E Generators, Ideal for Higher Current and Voltage Applications, Industrial Appliances, Military, Renewable Energy Systems Medium 5000 A @ 125 V dc, 5000 A @ 240 Vac MCCB - 79.7mm 79.7 x 69.85mm 69.9mm
RS庫存編號 881-1252
製造零件編號EA1-B0-16-680-32A-BF
HK$471.29
/個 (每包:4個)
單位
80A 1 - - - E Generators, Ideal for Higher Current and Voltage Applications, Industrial Appliances, Military, Renewable Energy Systems Long 5000 A @ 125 V dc, 5000 A @ 240 Vac MCCB - 26.5mm 26.5 x 69.85mm 69.9mm
RS庫存編號 881-1255
製造零件編號EA1-B0-24-620-22A-DC
HK$183.59
單位
20A 1 - - - E Generators, Ideal for Higher Current and Voltage Applications, Industrial Appliances, Military, Renewable Energy Systems Medium 5000 A @ 125 V dc, 5000 A @ 240 Vac MCCB - 26.5mm 26.5 x 69.85mm 69.9mm
RS庫存編號 881-0937
製造零件編號CA2-B0-34-615-121-D
HK$424.42
單位
15A 2 - - - C General Purpose Medium 5000 A @ 125/250 V dc, 10000 A @ 277 V ac MCCB - 38.6mm 38.61 x 52.37mm 52.4mm
RS庫存編號 881-1293
製造零件編號EA2-B0-26-640-32E-HB
HK$422.83
單位
40A 2 - - - E Generators, Ideal for Higher Current and Voltage Applications, Industrial Appliances, Military, Renewable Energy Systems Long 5000 A @ 125 V dc, 5000 A @ 240 Vac MCCB - 53.2mm 53.15 x 69.85mm 69.9mm
RS庫存編號 881-4885
製造零件編號BA2-B0-34-450-121-D
HK$316.07
單位
5A 2 - - - B Control Panels, Generator and Welder Markets, Marine Applications, Medical Equipment, Military, Office Equipment, Power Supplies Medium 5000 A @ 120/240 V ac, 5000 A @ 80 V dc MCCB 16mm - - -
RS庫存編號 881-1173
製造零件編號CTB-B-B-10
HK$14.63
/個 (每包:10個)
單位
10A 1 - - - CTB Audio Visual Equipment, Exercise Equipment, Household Appliances, Marine Applications, Medical Equipment, Power Strips, Power Supplies, Transportation Time Delayed 1000 A - - 16mm 16 x 13.84mm 13.8mm
RS庫存編號 881-5018
製造零件編號MD2-B-24-630-1-A36-B-C
HK$303.437
/個 (每包:6個)
單位
30A 2 - - - M Automotive, Communication Equipment, Generators, Marine Applications, Medical Equipment, Power Supplies Medium 600 A @ 80 V dc MCB - 33.8mm 33.76 x 37.08mm 37.1mm
RS庫存編號 881-4888
製造零件編號BA2-B0-34-610-121-D
HK$316.07
單位
10A 2 - - - B Control Panels, Generator and Welder Markets, Marine Applications, Medical Equipment, Military, Office Equipment, Power Supplies Medium 5000 A @ 120/240 V ac, 5000 A @ 80 V dc MCCB 16mm - - -
RS庫存編號 881-0868
製造零件編號CA1-B0-36-670-321-D
HK$224.00
單位
70A 1 - - - C General Purpose Long 5000 A @ 125/250 V dc, 10000 A @ 277 V ac MCCB - 19.3mm 19.3 x 52.37mm 52.4mm
RS庫存編號 881-1019
製造零件編號CA3-B0-24-620-121-CG
HK$1,629.65
單位
20A 3 - - - C General Purpose Medium 5000 A @ 125/250 V dc, 10000 A @ 277 V ac MCCB - 57.9mm 57.91 x 52.37mm 52.4mm
RS庫存編號 881-0940
製造零件編號CA2-B0-34-620-121-D
HK$424.42
單位
20A 2 - - - C General Purpose Medium 5000 A @ 125/250 V dc, 10000 A @ 277 V ac MCCB - 38.6mm 38.61 x 52.37mm 52.4mm
RS庫存編號 881-1347
製造零件編號EA3-B0-26-660-32E-HB
HK$1,678.46
單位
60A 3 - - - E Generators, Ideal for Higher Current and Voltage Applications, Industrial Appliances, Military, Renewable Energy Systems Long 5000 A @ 125 V dc, 5000 A @ 240 Vac MCCB - 79.7mm 79.7 x 69.85mm 69.9mm
RS庫存編號 881-4872
製造零件編號BA2-B0-24-615-31A-CG
HK$892.97
/個 (每包:2個)
單位
15A 2 - - - B Control Panels, Generator and Welder Markets, Marine Applications, Medical Equipment, Military, Office Equipment, Power Supplies Medium 5000 A @ 120/240 V ac, 5000 A @ 80 V dc MCCB 16mm - - -
RS庫存編號 881-1088
製造零件編號CLB-203-11A3N-B-A
HK$21.098
/個 (每包:10個)
單位
20A 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庫存編號 881-0943
製造零件編號CA2-B0-34-630-121-C
HK$424.42
單位
30A 2 - - - C General Purpose Medium 5000 A @ 125/250 V dc, 10000 A @ 277 V ac MCCB - 38.6mm 38.61 x 52.37mm 52.4mm
RS庫存編號 881-1003
製造零件編號CA3-B0-22-670-32A-C
HK$2,087.56
單位
70A 3 - - - C General Purpose Short 5000 A @ 125/250 V dc, 10000 A @ 277 V ac MCCB - 57.9mm 57.91 x 52.37mm 52.4mm
RS庫存編號 881-4961
製造零件編號MA1-B-34-620-1-A12-B-C
HK$118.11
單位
20A 1 - - - M Automotive, Communication Equipment, Generators, Marine Applications, Medical Equipment, Power Supplies Medium 600 A @ 80 V dc MCB - 18mm 18.03 x 37.08mm 37.1mm
RS庫存編號 881-1120
製造零件編號CM2-B0-34-630-201-C
HK$522.84
單位
30A 2 - - - C General Purpose Medium 5000 A @ 125/250 V dc, 10000 A @ 277 V ac MCCB 13.1mm - 13.09 (Dia.)mm -
RS庫存編號 881-1296
製造零件編號EA2-B0-26-620-32E-HB
HK$422.83
單位
20A 2 - - - E Generators, Ideal for Higher Current and Voltage Applications, Industrial Appliances, Military, Renewable Energy Systems Long 5000 A @ 125 V dc, 5000 A @ 240 Vac MCCB - 53.2mm 53.15 x 69.85mm 69.9mm