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 stock no. 782-0870
Mfr. Part No.W23-X1A1G-35
R 533.12
Each
units
35A 1 - 50 V dc, 250 V ac 0.69in W23 - - - - - - - -
RS stock no. 782-0886
Mfr. Part No.W23-X1A1G-5
R 514.99
Each
units
5A 1 - 50 V dc, 250 V ac 0.69in W23 - - - - - - - -
RS stock no. 409-867
Mfr. Part No.1610-21-6A
BrandETA
R 236.44
Each
units
6A 1 - 32V dc 20mm 1610 - - - - - - - -
RS stock no. 282-6545
Mfr. Part No.2210-T210-K0M1-H121-5A
BrandETA
R 756.88
Each
units
5A 1 - - 12.5mm 2210 - - - - - - - -
RS stock no. 881-1079
Mfr. Part No.CLB-153-11A3N-B-A
R 43.674
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
RS stock no. 333-259
Mfr. Part No.201-3A
BrandETA
R 792.11
Each
units
3A 1 - - 80mm 201 - - - - - - - -
RS stock no. 782-8038
Mfr. Part No.W58-XB1A4A-6
R 140.18
Each
units
6A 1 - 50 V dc, 250 V ac 0.66in W58 - - - - - - - -
RS stock no. 405-9214
Mfr. Part No.4130-G211-K4M1-35A
BrandETA
R 605.30
Each
units
35A 1 - - 18mm 4130 - - - - - - - -
RS stock no. 272-842
Mfr. Part No.GV3L50
R 7,410.02
Each
units
- 3 TeSys 690V ac 55mm GV3 - - 5 kA - - - - -
RS stock no. 782-7855
Mfr. Part No.W68-X2Q12-15
R 847.53
Each
units
15A 2 - 277V ac 1.5in W68 - - - - - - - -
RS stock no. 782-7821
Mfr. Part No.W57-XB1A7A10-5
R 72.42
Each
units
5A 1 - 250V ac 0.575in W57 - - - - - - - -
RS stock no. 333-287
Mfr. Part No.201-15A
BrandETA
R 792.65
Each
units
15A 1 - - 80mm 201 - - - - - - - -
RS stock no. 782-7931
Mfr. Part No.W57-XB7A4A10-15
R 53.47
Each
units
15A 1 - 250V ac 0.575in W57 - - - - - - - -
RS stock no. 782-0860
Mfr. Part No.W23-X1A1G-15
R 489.15
Each
units
15A 1 - 50 V dc, 250 V ac 0.69in W23 - - - - - - - -
RS stock no. 870-1023
Mfr. Part No.TS-701-HT-35
BrandSchurter
R 52.45
Each (In a Pack of 100)
units
35A 1 - 50 V dc, 250 V ac - TS-701 - - 1000 A MCB 9.7mm 8.9mm 8.9 x 9.7 (Dia.)mm -
RS stock no. 729-2704
Mfr. Part No.1410-G111-P2F1-S01-1A
BrandETA
R 199.89
Each
units
1A 1 - - 15.7mm 1410-G1 - - - - - - - -
RS stock no. 782-0889
Mfr. Part No.W23-X1A1G-3
R 804.64
Each
units
3A 1 - 50 V dc, 250 V ac 0.69in W23 - - - - - - - -
RS stock no. 122-9268
Mfr. Part No.3400-P10-H-SI-0.5A
BrandETA
R 1,046.31
Each
units
500mA 1 - - 14.5mm 3400 - - - - - - - -
RS stock no. 312-3780
Mfr. Part No.GB2DB07
R 1,500.11
Each
units
2A 2 - 277 V ac, 415 V ac 30mm GB2 - - 1 (dc) kA, 15 (ac) kA - - - - -
RS stock no. 782-0921
Mfr. Part No.W28-XQ1A-7
R 81.06
Each
units
7A 1 - 32 V dc, 250 V ac 0.76in W28 - - - - - - - -