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
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RS庫存編號 213-2516
製造零件編號3RV2111-1HA10
BrandSiemens
HK$1,310.64
單位
8A 3 SIRIUS 690V 65mm 3RV2 - - - - - - - -
全新
RS庫存編號 212-9048
製造零件編號3RV2711-0FD10
BrandSiemens
HK$1,568.47
單位
500mA 3 Sirius 400V ac 45mm 3RV2 - - - - - - - -
全新
RS庫存編號 209-6953
製造零件編號3RV2742-5LD10
BrandSiemens
HK$5,210.33
單位
60A 3 Sirius 400V ac 70mm 3RV2 - - - - - - - -
全新
RS庫存編號 213-2530
製造零件編號3RV2311-1GC20
BrandSiemens
HK$804.65
單位
6.3A 3 SIRIUS 690V 45mm 3RV2 - - - - - - - -
全新
RS庫存編號 209-6952
製造零件編號3RV2431-4TA10
BrandSiemens
HK$1,826.30
單位
17A 3 Sirius 400V ac 55mm 3RV2 - - - - - - - -
全新
RS庫存編號 212-9047
製造零件編號3RV2411-1KA20
BrandSiemens
HK$971.16
單位
12.5A 3 Sirius 400V ac 45mm 3RV2 - - - - - - - -
全新
RS庫存編號 212-9045
製造零件編號3RV2411-1GA15
BrandSiemens
HK$1,059.25
單位
6.3A 3 Sirius 400V ac 45mm 3RV2 - - - - - - - -
全新
RS庫存編號 212-9049
製造零件編號3RV2711-0JD10
BrandSiemens
HK$1,697.38
單位
1A 3 Sirius 400V ac 45mm 3RV2 - - - - - - - -
全新
RS庫存編號 212-9044
製造零件編號3RV2411-0DA20
BrandSiemens
HK$828.28
單位
320mA 3 Sirius 400V ac 45mm 3RV2 - - - - - - - -
RS庫存編號 2552611183
製造零件編號B315 (1)
BrandSiemens
HK$3,504.09
單位
- - - - - - - - - - - - - -
RS庫存編號 2552611184
製造零件編號B32 (1)
BrandSiemens
HK$1,236.59
單位
- - - - - - - - - - - - - -
RS庫存編號 2552606763
製造零件編號5SY6206-7 (1)
BrandSiemens
HK$484.69
單位
- - - - - - - - - - - - - -
RS庫存編號 2552610961
製造零件編號3LD2514-0TK53 (1)
BrandSiemens
HK$2,593.15
單位
- - - - - - - - - - - - - -
RS庫存編號 2552606762
製造零件編號5SY6203-7 (1)
BrandSiemens
HK$484.69
單位
- - - - - - - - - - - - - -
RS庫存編號 2552611218
製造零件編號E7 (1)
BrandSiemens
HK$280.09
單位
- - - - - - - - - - - - - -
RS庫存編號 2552611066
製造零件編號6ES75921AM000XB0 (1)
BrandSiemens
HK$638.14
單位
- - - - - - - - - - - - - -
RS庫存編號 2552607198
製造零件編號5SY5106-7 (1)
BrandSiemens
HK$549.48
單位
- - - - - - - - - - - - - -
RS庫存編號 2552610967
製造零件編號3TY7500-0A (1)
BrandSiemens
HK$11,830.69
單位
- - - - - - - - - - - - - -
RS庫存編號 2552611038
製造零件編號5SH5402 (1)
BrandSiemens
HK$11.94
單位
- - - - - - - - - - - - - -
RS庫存編號 2552611006
製造零件編號4AM6542-5AT10-0FA0 (1)
BrandSiemens
HK$36,992.15
單位
- - - - - - - - - - - - - -