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 2050 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
€133.97
Each
units
- 3 TeSys 690V ac 55mm GV3 - - 5 kA - - - - -
RS Stock No. 272-909
Mfr. Part No.GV3P25
€109.74
Each
units
- 3 TeSys 690V ac 55mm GV3 - - 6 kA - - - - -
RS Stock No. 173-9836
Mfr. Part No.4410.0106
BrandSchurter
€18.662
Each (In a Box of 20)
units
10A 1 - 240V ac 11.5mm T12 - - - - - - - -
RS Stock No. 284-6101
Mfr. Part No.4410.0106
BrandSchurter
€21.80
Each
units
10A 1 - 240V ac 11.5mm T12 - - - - - - - -
RS Stock No. 284-5906
Mfr. Part No.4400.0017
BrandSchurter
€6.37
Each
units
16A 1 - 240V ac - T11 - - - - - - - -
RS Stock No. 173-9833
Mfr. Part No.4400.0017
BrandSchurter
€5.792
Each (In a Box of 100)
units
16A 1 - 240V ac - T11 - - - - - - - -
RS Stock No. 405-9141
Mfr. Part No.2-5700-IG1-P10-DD-000040-10A
BrandETA
€16.52
Each
units
10A 1 - - 29mm 2-5700 - - - - - - - -
RS Stock No. 405-9157
Mfr. Part No.2-5700-IG1-P10-DD-000040-15A
BrandETA
€16.52
Each
units
15A 1 - - 29mm 2-5700 - - - - - - - -
RS Stock No. 608-8769
Mfr. Part No.GV3ME80
€204.05
Each
units
- 3 TeSys 690V ac 61mm GV3M - - 100 kA - - - - -
RS Stock No. 273-0860
Mfr. Part No.1658-G21-02-P10-10A
BrandETA
€8.88
Each
units
10A 1 - - 32mm 1658 - - - - - - - -
RS Stock No. 344-5333
Mfr. Part No.1658-G21-02-P10-16A
BrandETA
€10.26
Each
units
16A 1 - - 32mm 1658 - - - - - - - -
RS Stock No. 405-9179
Mfr. Part No.2-5700-IG1-P10-DD-000040-20A
BrandETA
€16.52
Each
units
20A 1 - - 29mm 2-5700 - - - - - - - -
RS Stock No. 768-0906
Mfr. Part No.2800852
€56.69
Each
units
6A 1 TRABTECH - 12.3mm CB TM1 6A M1 P - - - - - - - -
RS Stock No. 272-943
Mfr. Part No.GV3P50
€146.11
Each
units
- 3 TeSys 690V ac 55mm GV3 - - 5 kA - - - - -
RS Stock No. 312-3724
Mfr. Part No.GB2CB20
€16.45
Each
units
12A 1 - 277 V ac, 415 V ac 15mm GB2 - - 1.5 kA - - - - -
RS Stock No. 344-5327
Mfr. Part No.1658-G21-02-P10-6A
BrandETA
€10.26
Each
units
6A 1 - - 32mm 1658 - - - - - - - -
RS Stock No. 782-0911
Mfr. Part No.W28-XQ1A-3
€2.46
Each
units
3A 1 - 32 V dc, 250 V ac 0.76in W28 - - - - - - - -
RS Stock No. 881-1145
Mfr. Part No.CMB-073-11C3N-B-A
€1.985
Each (In a Pack of 10)
units
7A 1 - - - CMB 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 Stock No. 870-1060
Mfr. Part No.TS-709-5
BrandSchurter
€3.35
Each
units
5A 1 - 32 V dc, 250 V ac - TS-709 - - 1000 A MCB 11.1mm 10.3mm 10.3 x 11.1 (Dia.)mm -
RS Stock No. 881-1079
Mfr. Part No.CLB-153-11A3N-B-A
€2.283
Each (In a Pack of 10)
units
15A 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
Related Products
All CBEs have blade terminals and have an ...
Description:
All CBEs have blade terminals and have an insulation resistance greater than 100MΩ (Mega. Ohms). T9 single-pole, compact thermal circuit breakers.Trigger via a bimetallic element.Connection via Faston terminals.Reset button on the front panel.Snap-fitting installation.
Single, two and three pole rocker switch/thermal trip ...
Description:
Single, two and three pole rocker switch/thermal trip free circuit breakers (S-type TO CBE) of compact design for snap-in panel mounting. Available either with protection on one/both/all poles or, in the case of the double pole version, protection on one ...
M12 thread-neck panel mounting. Screw terminals. Particularly suited ...
Description:
M12 thread-neck panel mounting. Screw terminals. Particularly suited for applications with high fault currents.IEC Classification R/TO.
Cliff Electronics manual reset A-0709 series of circuit ...
Description:
Cliff Electronics manual reset A-0709 series of circuit protection devices offer a comprehensive solution to a variety of circuit protection requirements. The A-0709 series is available in either M10 or snap-in types, with a range of values up to 16A. ...