Thermal Automotive Circuit Breakers

Thermal automotive circuit breakers are devices used to break the flow of current in automotive circuits, in order to protect them against a fault such as overcurrent or short circuit.

The thermal aspect of this type of circuit breaker allows for smaller overcurrents over a longer period of time, but will quickly trip the circuit for larger overcurrents. This is useful in the case of motors, as there will be a small overcurrent each time the engine is switched on for a short length of time, which should not trip the circuit.

What are thermal automotive circuit breakers used for?

Thermal automotive circuit breakers are used to protect electrical networks in most types of vehicles, including cars, vans, buses, and boats.

Types of thermal automotive circuit breakers

Thermal automotive circuit breakers all function in the same way, but they can differ according to a number of different characteristics. They can have varying current and voltage ratings, width dimensions, and numbers of poles.


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Description Price Current Rating Number of Poles Width Voltage Rating Breaking Capacity at Maximum Voltage Rating Mounting Style Overall Depth Overall Dimensions Overall Length Reset Actuator Type Series Terminal Contact Type
RS Stock No. 854-475
Mfr. Part No.1170-21-20A
BrandETA
SGD22.03
Each
units
20A 1 22mm 28V dc - - - - - - 1170 -
RS Stock No. 729-2720
Mfr. Part No.1616-21-7.5A
BrandETA
SGD18.61
Each
units
7.5A 1 6mm 32V dc - - - - - - - -
RS Stock No. 851-1959
Mfr. Part No.CB181P-110
SGD154.94
Each
units
110A 1 - 30V - - - - - - - -
RS Stock No. 851-1454
Mfr. Part No.UCB-15
SGD14.138
Each (In a Pack of 10)
units
15A 1 - 12V - - - - - - - -
RS Stock No. 878-1287
Mfr. Part No.0813050.ZXST
BrandLittelfuse
SGD15.32
Each
units
50A - - 12V - Chassis - - - Automatic 08130 Box Lug
RS Stock No. 652-3458
Mfr. Part No.0700015
SGD14.32
Each (In a Pack of 5)
units
15A 1 6mm 32V dc 150 A - - - - - TCP 15/DC32V -
RS Stock No. 652-3436
Mfr. Part No.0700010
SGD14.32
Each (In a Pack of 5)
units
10A 1 6mm 32V dc 150 A - 24mm 24 x 6 x 20.3mm 20.3mm - TCP 10/DC32V -
RS Stock No. 729-2736
Mfr. Part No.1616-21-20A
BrandETA
SGD18.00
Each
units
20A 1 6mm 32V dc - - - - - - - -
RS Stock No. 652-3385
Mfr. Part No.0700005
SGD14.32
Each (In a Pack of 5)
units
5A 1 6mm 32V dc 150 A - 24mm 24 x 6 x 20.3mm 20.3mm - TCP5/DC32V -
RS Stock No. 723-4819
Mfr. Part No.1626-3H-5A
BrandETA
SGD16.45
Each
units
5A 1 7mm 29V dc - - - - - - - -
RS Stock No. 723-4821
Mfr. Part No.1626-3H-10A
BrandETA
SGD16.02
Each
units
10A 1 7mm 29V dc - - - - - - - -
RS Stock No. 729-2748
Mfr. Part No.1616-21-30A
BrandETA
SGD20.63
Each
units
30A 1 6mm 32V dc - - - - - - - -
RS Stock No. 723-4837
Mfr. Part No.1626-3H-25A
BrandETA
SGD16.58
Each
units
25A 1 7mm 29V dc - - - - - - - -
RS Stock No. 729-2745
Mfr. Part No.1616-21-25A
BrandETA
SGD21.89
Each
units
25A 1 6mm 32V dc - - - - - - - -
RS Stock No. 729-2726
Mfr. Part No.1616-21-5A
BrandETA
SGD19.25
Each
units
5A 1 6mm 32V dc - - - - - - - -
RS Stock No. 729-2701
Mfr. Part No.129-L11-H-KF-25A
BrandETA
SGD29.14
Each
units
25A 1 11.5mm - - - - - - - - -
RS Stock No. 723-4828
Mfr. Part No.1626-3H-7.5A
BrandETA
SGD17.44
Each
units
7.5A 1 7mm 29V dc - - - - - - - -
RS Stock No. 652-3414
Mfr. Part No.0700020
SGD14.312
Each (In a Pack of 5)
units
20A 1 6mm 32V dc 150 A - 24mm 24 x 6 x 20.3mm 20.3mm - TCP 20/DC32V -
RS Stock No. 652-3442
Mfr. Part No.0700025
SGD14.312
Each (In a Pack of 5)
units
25A 1 6mm 32V dc 150 A - 24mm 24 x 6 x 20.3mm 20.3mm - TCP 25/DC32V -
RS Stock No. 854-481
Mfr. Part No.1170-21-25A
BrandETA
SGD21.17
Each
units
25A 1 22mm 28V dc - - - - - - 1170 -
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