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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Omschrijving Prijs 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-stocknr. 150-085
Fabrikantnummer1610-21-30A
FabrikantETA
12,62 €
Each
Aantal stuks
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RS-stocknr. 405-9258
Fabrikantnummer4130-G211-K4M1-60A
FabrikantETA
34,50 €
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Aantal stuks
60A 1 - - 18mm 4130 - - - - - - - -
RS-stocknr. 286-4165
Fabrikantnummer3120-F521-H7T1-W01D-20A
FabrikantETA
35,52 €
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Aantal stuks
20A 2 - - 25mm 3120 - - - - - - - -
RS-stocknr. 273-4648
Fabrikantnummer8340-F410-P1M1-A3H0-15A
FabrikantETA
39,77 €
Each
Aantal stuks
15A 1 - 80V dc 19mm 8340 - - - - - - - -
RS-stocknr. 782-7975
FabrikantnummerW54-XB1A4A10-15
FabrikantTE Connectivity
3,75 €
Each
Aantal stuks
15A 1 - 250V ac 0.575in W54 - - - - - - - -
RS-stocknr. 173-9829
Fabrikantnummer4400.0031
FabrikantSchurter
5,173 €
Each (In a Box of 100)
Aantal stuks
12A 1 - 240V ac - T11 - - - - - - - -
RS-stocknr. 286-3982
Fabrikantnummer3120-F551-H7T1-W02D-3A
FabrikantETA
18,09 €
Each
Aantal stuks
3A 2 - - 25mm 3120 - - - - - - - -
RS-stocknr. 335-996
Fabrikantnummer106-P30-000040-2A
FabrikantETA
8,74 €
Each
Aantal stuks
2A 1 - - 19mm 106-P30 - - - - - - - -
RS-stocknr. 899-4565
Fabrikantnummer3C16UL
FabrikantAltech
66,53 €
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Aantal stuks
16A 3 - 480Y/277V - UL Lighting and Control Circuit Applications, Low Inrush Motors, Receptacles, Resistive Load, UL489 Application, Wiring Protection Time Delay 10 kA MCCB - - - -
RS-stocknr. 335-980
Fabrikantnummer106-P30-000040-3A
FabrikantETA
8,49 €
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Aantal stuks
3A 1 - - 19mm 106-P30 - - - - - - - -
RS-stocknr. 173-9832
Fabrikantnummer4400.0052
FabrikantSchurter
5,173 €
Each (In a Box of 100)
Aantal stuks
12A 1 - 240V ac - T11 - - - - - - - -
RS-stocknr. 899-1566
Fabrikantnummer2D6UM
FabrikantAltech
30,71 €
Each
Aantal stuks
6A 2 - - - V-EA AC Discharge Lamps (Ballast), AC General Use, AC Incandescent Lamps (Tungsten), AC Motor Starting, AC Resistance, Across the Line, Heaters and Reactive Loads, High Inrush Motors, Power Supplies, Transformers, UL508 Application Time Delay 10 kA MCCB - - - -
RS-stocknr. 286-4092
Fabrikantnummer3120-F521-H7T1-W01D-1A
FabrikantETA
37,74 €
Each
Aantal stuks
1A 2 - - 25mm 3120 - - - - - - - -
RS-stocknr. 729-2789
Fabrikantnummer3120-F554-P7T1-W02D-10A
FabrikantETA
27,48 €
Each
Aantal stuks
10A 2 - - 25mm 3120-F - - - - - - - -
RS-stocknr. 729-2723
Fabrikantnummer1410-G111-P2F1-S01-10A
FabrikantETA
11,03 €
Each
Aantal stuks
10A 1 - - 15.7mm 1410-G1 - - - - - - - -
RS-stocknr. 899-4981
Fabrikantnummer3D32UM
FabrikantAltech
46,06 €
Each
Aantal stuks
32A 3 - 480Y/277V - V-EA AC Discharge Lamps (Ballast), AC General Use, AC Incandescent Lamps (Tungsten), AC Motor Starting, AC Resistance, Across the Line, Heaters and Reactive Loads, High Inrush Motors, Power Supplies, Transformers, UL508 Application Time Delay 10 kA MCCB - - - -
RS-stocknr. 312-3702
FabrikantnummerGB2CB14
18,41 €
Each
Aantal stuks
8A 1 - 277 V ac, 415 V ac 15mm GB2 - - 1 (dc) kA, 1.5 (ac) kA - - - - -
RS-stocknr. 170-3785
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FabrikantPhoenix Contact
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Aantal stuks
500mA 1 - 65 V dc, 250 V ac 8.2mm TCP 0.5A - - - - - - - -
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FabrikantPhoenix Contact
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Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 801-6898
Fabrikantnummer0712152
FabrikantPhoenix Contact
16,69 €
Each
Aantal stuks
500mA 1 - 65 V dc, 250 V ac 8.2mm TCP 0.5A - - - - - - - -