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. 774-0011
FabrikantnummerFC6607A
5,29 €
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Aantal stuks
7A - - - 11mm A-0709 - - - - - - - -
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FabrikantAltech
44,36 €
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40A 2 - 240V ac - L Heaters and Reactive Loads, High Inrush Motors, Power Supplies, Transformer, UL489 Applications Time Delay 10 kA MCCB - - - -
RS-stocknr. 729-2824
Fabrikantnummer3140-F230-P7T1-SGRX-2.5A
FabrikantETA
58,69 €
Each
Aantal stuks
2.5A 3 - - 54.5mm 3140 - - - - - - - -
RS-stocknr. 174-5394
Fabrikantnummer3-104-513
FabrikantSchurter
1,615 €
Each (In a Bag of 100)
Aantal stuks
100mA - - 60V dc 6.5mm RTS - - 400 A - - - - -
RS-stocknr. 175-1499
FabrikantnummerGV4P115N6
381,60 €
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Aantal stuks
115A 3 TeSys 690V ac 165mm GV4P - - 8 kA @ 660 → 690 V ac - - - - -
RS-stocknr. 173-8101
Fabrikantnummer4410.9003
FabrikantSchurter
28,75 €
Each (In a Box of 10)
Aantal stuks
10A 1 - 28 V dc, 240 V ac - T12 Household Appliances, Power Supplies, Power Tools, Uninterruptible Power Supply - 1 kA MCB 22mm - - -
RS-stocknr. 899-2944
Fabrikantnummer2BU20R
FabrikantAltech
23,13 €
Each
Aantal stuks
20A 2 - 480Y/277V - R Appliance Circuit, Appliances, Business Equipment, Control Circuits and Some Electronic Applications, Lighting, Power Supplies, Sensitive Electronics, UL1077 Application, Wiring Protection Time Delay 10 kA MCCB - - - -
Nieuw
RS-stocknr. 213-2516
Fabrikantnummer3RV2111-1HA10
FabrikantSiemens
122,00 €
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Aantal stuks
8A 3 SIRIUS 690V 65mm 3RV2 - - - - - - - -
RS-stocknr. 458-8712
Fabrikantnummer1180-01-4A
FabrikantETA
17,69 €
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Aantal stuks
4A 1 - - 8.2mm 1180 - - - - - - - -
RS-stocknr. 868-8819
Fabrikantnummer4400.0345
FabrikantSchurter
8,77 €
Each
Aantal stuks
3A 1 - - - - - - - MCB - - - -
RS-stocknr. 175-1508
FabrikantnummerGV4P50B6
242,16 €
Each
Aantal stuks
50A 3 TeSys 690V ac 165mm GV4P - - 10 kA @ 500 V ac - - - - -
RS-stocknr. 333-287
Fabrikantnummer201-15A
FabrikantETA
40,23 €
Each
Aantal stuks
15A 1 - - 80mm 201 - - - - - - - -
RS-stocknr. 729-2833
Fabrikantnummer3600-P10-Si-1A
FabrikantETA
84,87 €
Each
Aantal stuks
1A 1 - - 11.5mm 3600 - - - - - - - -
RS-stocknr. 188-4743
FabrikantnummerGV3P736
345,00 €
Each
Aantal stuks
73A 3 TeSys 690V ac 136mm GV3P - - 6 kA @ 690 V ac - - - - -
RS-stocknr. 782-7887
FabrikantnummerW67-X2Q12-30
FabrikantTE Connectivity
22,45 €
Each
Aantal stuks
30A 1 - 277V ac 0.75in W67 - - - - - - - -
Nieuw
RS-stocknr. 218-8569
Fabrikantnummer1492-GH015
71,30 €
Each
Aantal stuks
1.5A 1 1492-GH Supplementary Protectors 250V ac 12.4mm 1492-GH - - - - - - - -
RS-stocknr. 830-4280
Fabrikantnummer4404.0096
FabrikantSchurter
3,67 €
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Aantal stuks
3A 1 - 48 V dc, 240 V ac 19mm T9 - - - - - - - -
RS-stocknr. 782-7944
FabrikantnummerW23-X1A1G-2
FabrikantTE Connectivity
40,87 €
Each
Aantal stuks
2A 1 - 50 V dc, 250 V ac 0.69in W23 - - - - - - - -
RS-stocknr. 899-4900
Fabrikantnummer3D15UL
FabrikantAltech
66,53 €
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Aantal stuks
15A 3 - 480Y/277V - UL Heaters and Reactive Loads, High Inrush Motors, Power Supplies, Transformers Time Delay 10 kA MCCB - - - -
RS-stocknr. 312-3881
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20A 2 - 277 V ac, 415 V ac 30mm GB2 - - 1.5 kA - - - - -