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. 312-3667
Mfr. Part No.GB2CB09
TWD627.00
Each
units
4A 1 - 277 V ac, 415 V ac 15mm GB2 - - 1 (dc) kA, 6 (ac) kA - - - - -
RS Stock No. 272-937
Mfr. Part No.GV3P65
TWD5,650.00
Each
units
- 3 TeSys 690V ac 55mm GV3 - - 5 kA - - - - -
RS Stock No. 312-3651
Mfr. Part No.GB2CB08
TWD608.00
Each
units
3A 1 - 277 V ac, 415 V ac 15mm GB2 - - 1 (dc) kA, 10 (ac) kA - - - - -
RS Stock No. 830-3060
Mfr. Part No.GV3P32
TWD17,329.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 323-9021
Mfr. Part No.GB2CD09
TWD1,059.00
Each
units
4A 1P + N - 250V ac 15mm GB2 - - 1 (dc) kA, 3 (ac) kA - - - - -
RS Stock No. 125-1367
Mfr. Part No.A9C64416
TWD13,820.00
Each
units
16A 4 Acti 9 - - iC60H Commercial, Residential - 15 kA @ 380 → 415 V ac, 30 kA @ 220 → 240 V ac MCB - - - -
RS Stock No. 272-921
Mfr. Part No.GV3P40
TWD4,627.00
Each
units
- 3 TeSys 690V ac 55mm GV3 - - 5 kA - - - - -
RS Stock No. 175-1523
Mfr. Part No.GV4PE03S6
TWD17,905.00
Each
units
3.5A 3 TeSys 690V ac 116mm GV4PE - - 10 kA @ 660 → 690 V ac - - - - -
RS Stock No. 323-8983
Mfr. Part No.GB2CD05
TWD1,340.00
Each
units
500mA 1P + N - 250V ac 15mm GB2 - - 1 (dc) kA, 50 (ac) kA - - - - -
RS Stock No. 175-1587
Mfr. Part No.GV4PEM50N6
TWD19,018.00
Each
units
50A 3 TeSys 690V ac 116mm GV4PEM - - 8 kA @ 660 → 690 V ac - - - - -
RS Stock No. 323-8999
Mfr. Part No.GB2CD06
TWD1,340.00
Each
units
1A 1P + N - 250V ac 15mm GB2 - - 1 (dc) kA, 50 (ac) kA - - - - -
RS Stock No. 175-1524
Mfr. Part No.GV4PE07N
TWD15,933.00
Each
units
7A 3 TeSys 690V ac 116mm GV4PE - - 8 kA @ 660 → 690 V ac - - - - -
RS Stock No. 272-836
Mfr. Part No.GV3L40
TWD6,654.00
Each
units
- 3 TeSys 690V ac 55mm GV3 - - 5 kA - - - - -
RS Stock No. 312-3825
Mfr. Part No.GB2DB10
TWD1,200.00
Each
units
5A 2 - 277 V ac, 415 V ac 30mm GB2 - - 1 (dc) kA, 2 (ac) kA - - - - -
RS Stock No. 175-1582
Mfr. Part No.GV4PEM25S
TWD23,635.00
Each
units
25A 3 TeSys 690V ac 116mm GV4PEM - - 10 kA @ 660 → 690 V ac - - - - -
RS Stock No. 188-4744
Mfr. Part No.GV3L736
TWD12,910.00
Each
units
73A 3 TeSys 690V ac 136mm GV3L - - 6 kA @ 690 V ac - - - - -
RS Stock No. 175-1439
Mfr. Part No.GV4L25N
TWD14,028.00
Each
units
25A 3 TeSys 690V ac 165mm GV4L - - 8 kA @ 660 → 690 V ac - - - - -
RS Stock No. 272-814
Mfr. Part No.GV3L25
TWD5,280.00
Each
units
- 3 TeSys 690V ac 55mm GV3 - - 6 kA - - - - -
RS Stock No. 175-1525
Mfr. Part No.GV4PE07N6
TWD15,009.00
Each
units
7A 3 TeSys 690V ac 116mm GV4PE - - 8 kA @ 660 → 690 V ac - - - - -
RS Stock No. 175-1533
Mfr. Part No.GV4PE115S6
TWD22,949.00
Each
units
115A 3 TeSys 690V ac 116mm GV4PE - - 10 kA @ 660 → 690 V ac - - - - -