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. 729-2758
Fabrikantnummer2-5700-IG2-P10-DD-000040-10A
FabrikantETA
€ 23,44
Each
Aantal stuks
10A 1 - - - 2 5700 - - - - - - - -
RS-stocknr. 782-8016
FabrikantnummerW54-XB1A4A10-30
FabrikantTE Connectivity
€ 3,51
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Aantal stuks
30A 1 - 250V ac 0.575in W58 - - - - - - - -
RS-stocknr. 286-4137
Fabrikantnummer3120-F521-H7T1-W01D-10A
FabrikantETA
€ 29,80
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Aantal stuks
10A 2 - - 25mm 3120 - - - - - - - -
RS-stocknr. 881-1072
FabrikantnummerCF2-B0-26-470-21A-DJ
€ 147,175
Each (In a Pack of 2)
Aantal stuks
7A 2 - - - C General Purpose Long 5000 A @ 125/250 V dc, 10000 A @ 277 V ac MCCB - - - -
RS-stocknr. 879-8641
FabrikantnummerAA1-B0-34-625-3B1-C
€ 14,46
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Aantal stuks
25A 1 - - - A Generators, Marine Applications, Military, Renewable Energy Systems, Telecommunications, Welder Medium 5000 A @ 80 V dc - 16mm - - -
RS-stocknr. 868-8881
Fabrikantnummer4404.0038
FabrikantSchurter
€ 1,625
Each (In a Pack of 100)
Aantal stuks
15A 1 - - - T9-711 Household Appliances, HVAC, Industrial Appliances, Medical, Power Supplies, Power Tools, Uninterruptible Power Supply - 2 kA MCB 15.9mm 13.9mm 13.9 x 15.9 (Dia.)mm -
RS-stocknr. 774-0027
FabrikantnummerFC6610A
€ 6,86
Each
Aantal stuks
10A - - - 11mm A-0709 - - - - - - - -
RS-stocknr. 881-5093
FabrikantnummerMU1-B-34-430-1-A21-B-D
€ 7,68
Each
Aantal stuks
3A 1 - - - M Automotive, Communication Equipment, Generators, Marine Applications, Medical Equipment, Power Supplies Medium 600 A @ 80 V dc MCB 9.5mm - 9.53 (Dia.)mm -
RS-stocknr. 284-5798
Fabrikantnummer4400.0008
FabrikantSchurter
€ 7,86
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1A 1 - 240V ac - T11 - - - - - - - -
RS-stocknr. 899-4537
Fabrikantnummer3C10UM
FabrikantAltech
€ 46,06
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Aantal stuks
10A 3 - 480Y/277V - V-EA AC Discharge Lamps (Ballast), AC General Use, AC Incandescent Lamps (Tungsten), AC Motor Starting, AC Resistance, Across the Line, Appliances, Business Equipment, Control Circuit Applications, Lighting, Low Inrush Motors, UL508 Application, Wiring Protection Time Delay 10 kA MCCB - - - -
RS-stocknr. 286-4171
Fabrikantnummer3120-F32F-H7T1-SGRX-1A
FabrikantETA
€ 29,42
Each
Aantal stuks
1A 2 - - 25mm 3120 - - - - - - - -
RS-stocknr. 729-2776
Fabrikantnummer2-5700-IG2-P10-DD-000040-25A
FabrikantETA
€ 23,44
Each
Aantal stuks
25A 1 - - - 2 5700 - - - - - - - -
RS-stocknr. 712-7660
Fabrikantnummer3120-F551-H7T1-W19DG4-16A
FabrikantETA
€ 26,69
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Aantal stuks
16A 2 - - 25mm 3120 - - - - - - - -
RS-stocknr. 899-2979
Fabrikantnummer2BU4R
FabrikantAltech
€ 26,78
Each
Aantal stuks
4A 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 - - - -
RS-stocknr. 170-3783
Fabrikantnummer0712194
FabrikantPhoenix Contact
€ 18,207
Each (In a Box of 20)
Aantal stuks
1A 1 - 65 V dc, 250 V ac 8.2mm TCP1A - - - - - - - -
RS-stocknr. 898-1887
Fabrikantnummer1G2.5UM
FabrikantAltech
€ 16,69
Each
Aantal stuks
2.5A 1 - 42V dc - V-EA - Time Delay 10 kA MCCB - - - -
RS-stocknr. 284-6050
Fabrikantnummer4410.0172
FabrikantSchurter
€ 12,46
Each
Aantal stuks
1A 1 - 240V ac - T12 - - - - - - - -
RS-stocknr. 899-8958
Fabrikantnummer3E2.5UM
FabrikantAltech
€ 60,25
Each
Aantal stuks
2.5A 3 - 480Y/277V - V-EA AC Discharge Lamps (Ballast), AC General Use, AC Incandescent Lamps (Tungsten), AC Motor Starting, AC Resistance, Across the Line, High Efficiency Motors, UL508 Application, Which have Exceedingly High Inrush Current Time Delay 10 kA MCCB - - - -
RS-stocknr. 284-5877
Fabrikantnummer4400.0003
FabrikantSchurter
€ 5,09
Each
Aantal stuks
10A 1 - 240V ac - T11 - - - - - - - -
RS-stocknr. 712-7648
Fabrikantnummer3120-F551-H7T1-W14DR4-16A
FabrikantETA
€ 26,40
Each
Aantal stuks
16A 2 - - 25mm 3120 - - - - - - - -
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