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. 2508421792
Mfr. Part No.TR-11CX632.5A
BrandAltech
£4.26
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RS Stock No. 2508421865
Mfr. Part No.TR-11CY6310A
BrandAltech
£3.86
Each
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RS Stock No. 2508763327
Mfr. Part No.TS-701-HT-10
BrandSchurter
£2.85
Each
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RS Stock No. 2509493701
Mfr. Part No.C10A1P
£17.55
Each
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RS Stock No. 2508421758
Mfr. Part No.TR-11CX631.5A
BrandAltech
£4.26
Each
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RS Stock No. 2508421859
Mfr. Part No.TR-11CY639A
BrandAltech
£3.86
Each
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RS Stock No. 2508421720
Mfr. Part No.TR-11CX630.9A
BrandAltech
£4.26
Each
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RS Stock No. 2508421815
Mfr. Part No.TR-11CX633A
BrandAltech
£4.26
Each
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RS Stock No. 2508421742
Mfr. Part No.TR-11CX631.2A
BrandAltech
£4.26
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RS Stock No. 2509007252
Mfr. Part No.TR-11CX636A
BrandAltech
£3.86
Each
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RS Stock No. 2509007246
Mfr. Part No.TR-11CX634A
BrandAltech
£4.26
Each
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RS Stock No. 2509493969
Mfr. Part No.C10A2P
£31.33
Each
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RS Stock No. 2508421843
Mfr. Part No.TR-11CY638A
BrandAltech
£3.86
Each
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RS Stock No. 2508421837
Mfr. Part No.TR-11CY637A
BrandAltech
£3.86
Each
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RS Stock No. 2508357975
Mfr. Part No.C25A2P-489
£37.24
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RS Stock No. 2509494063
Mfr. Part No.C20A1P-489
£19.50
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RS Stock No. 2509494013
Mfr. Part No.C15A3P
£50.27
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RS Stock No. 2509493953
Mfr. Part No.C5A2P
£33.53
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RS Stock No. 2508421770
Mfr. Part No.TR-11CX632A
BrandAltech
£4.26
Each
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RS Stock No. 2509494057
Mfr. Part No.C15A1P-489
£17.41
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