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.


...
Read more Read less

Filters

Viewing 1 - 20 of 220 products
Results per page
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
R 3,058.17
Each
units
- 3 TeSys 690V ac 55mm GV3 - - 5 kA - - - - -
RS stock no. 608-8769
Mfr. Part No.GV3ME80
R 4,579.06
Each
units
- 3 TeSys 690V ac 61mm GV3M - - 100 kA - - - - -
RS stock no. 272-937
Mfr. Part No.GV3P65
R 3,529.90
Each
units
- 3 TeSys 690V ac 55mm GV3 - - 5 kA - - - - -
RS stock no. 272-943
Mfr. Part No.GV3P50
R 3,331.23
Each
units
- 3 TeSys 690V ac 55mm GV3 - - 5 kA - - - - -
RS stock no. 323-8999
Mfr. Part No.GB2CD06
R 451.67
Each
units
1A 1P + N - 250V ac 15mm GB2 - - 1 (dc) kA, 50 (ac) kA - - - - -
RS stock no. 272-842
Mfr. Part No.GV3L50
R 3,299.95
Each
units
- 3 TeSys 690V ac 55mm GV3 - - 5 kA - - - - -
RS stock no. 272-820
Mfr. Part No.GV3L32
R 2,782.37
Each
units
- 3 TeSys 690V ac 55mm GV3 - - 6 kA - - - - -
RS stock no. 312-3724
Mfr. Part No.GB2CB20
R 347.76
Each
units
12A 1 - 277 V ac, 415 V ac 15mm GB2 - - 1.5 kA - - - - -
RS stock no. 312-3825
Mfr. Part No.GB2DB10
R 782.67
Each
units
5A 2 - 277 V ac, 415 V ac 30mm GB2 - - 1 (dc) kA, 2 (ac) kA - - - - -
RS stock no. 312-3689
Mfr. Part No.GB2CB12
R 347.76
Each
units
6A 1 - 277 V ac, 415 V ac 15mm GB2 - - 1 (dc) kA, 1.5 (ac) kA - - - - -
RS stock no. 312-3730
Mfr. Part No.GB2CB21
R 393.80
Each
units
16A 1 - 277 V ac, 415 V ac 15mm GB2 - - 1.5 kA - - - - -
RS stock no. 312-3780
Mfr. Part No.GB2DB07
R 782.42
Each
units
2A 2 - 277 V ac, 415 V ac 30mm GB2 - - 1 (dc) kA, 15 (ac) kA - - - - -
RS stock no. 323-9015
Mfr. Part No.GB2CD08
R 524.40
Each
units
3A 1P + N - 250V ac 15mm GB2 - - 1 (dc) kA, 3 (ac) kA - - - - -
RS stock no. 312-3869
Mfr. Part No.GB2DB20
R 782.42
Each
units
12A 2 - 277 V ac, 415 V ac 30mm GB2 - - 1.5 kA - - - - -
RS stock no. 175-1456
Mfr. Part No.GV4LE03S
R 5,787.80
Each
units
3.5A 3 TeSys 690V ac 116mm GV4LE - - 10 kA @ 660 → 690 V ac - - - - -
RS stock no. 175-1535
Mfr. Part No.GV4PE12N6
R 5,457.80
Each
units
12.5A 3 TeSys 690V ac 116mm GV4PE - - 8 kA @ 660 → 690 V ac - - - - -
RS stock no. 610-0910
Mfr. Part No.GB2CD16
R 524.40
Each
units
10A 1P + N - 250V ac 15mm GB2 - - 1 (dc) kA, 1.5 (ac) kA - - - - -
RS stock no. 175-1547
Mfr. Part No.GV4PE50N6
R 5,569.23
Each
units
50A 3 TeSys 690V ac 116mm GV4PE - - 8 kA @ 660 → 690 V ac - - - - -
RS stock no. 175-1584
Mfr. Part No.GV4PEM50B
R 5,920.59
Each
units
50A 3 TeSys 690V ac 116mm GV4PEM - - 10 kA @ 500 V ac - - - - -
RS stock no. 175-1536
Mfr. Part No.GV4PE12S
R 6,902.89
Each
units
12.5A 3 TeSys 690V ac 116mm GV4PE - - 10 kA @ 660 → 690 V ac - - - - -