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. 878-1287
Mfr. Part No.0813050.ZXST
BrandLittelfuse
£10.16
Each
Units
50A - - 12V - Chassis - - - Automatic 08130 Box Lug
RS Stock No. 729-2748
Mfr. Part No.1616-21-30A
BrandETA
£11.98
Each
Units
30A 1 6mm 32V dc - - - - - - - -
RS Stock No. 652-3385
Mfr. Part No.0700005
£8.998
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. 851-1454
Mfr. Part No.UCB-15
£8.076
Each (In a Pack of 10)
Units
15A 1 - 12V - - - - - - - -
RS Stock No. 729-2726
Mfr. Part No.1616-21-5A
BrandETA
£11.50
Each
Units
5A 1 6mm 32V dc - - - - - - - -
RS Stock No. 652-3414
Mfr. Part No.0700020
£44.99
1 Pack of 5
Pack(s)
20A 1 6mm 32V dc 150 A - 24mm 24 x 6 x 20.3mm 20.3mm - TCP 20/DC32V -
RS Stock No. 851-1959
Mfr. Part No.CB181P-110
£96.22
Each
Units
110A 1 - 30V - - - - - - - -
RS Stock No. 854-475
Mfr. Part No.1170-21-20A
BrandETA
£10.80
Each
Units
20A 1 22mm 28V dc - - - - - - 1170 -
RS Stock No. 652-3436
Mfr. Part No.0700010
£44.99
1 Pack of 5
Pack(s)
10A 1 6mm 32V dc 150 A - 24mm 24 x 6 x 20.3mm 20.3mm - TCP 10/DC32V -
RS Stock No. 652-3420
Mfr. Part No.0700030
£8.998
Each (In a Pack of 5)
Units
30A 1 6mm 32V dc 150 A - 24mm 24 x 6 x 20.3mm 20.3mm - TCP 30/DC32V -
RS Stock No. 723-4825
Mfr. Part No.1626-3H-15A
BrandETA
£8.10
Each
Units
15A 1 7mm 29V dc - - - - - - - -
RS Stock No. 854-431
Mfr. Part No.1170-21-6A
BrandETA
£10.80
Each
Units
6A 1 22mm 28V dc - - - - - - 1170 -
RS Stock No. 854-481
Mfr. Part No.1170-21-25A
BrandETA
£11.34
Each
Units
25A 1 22mm 28V dc - - - - - - 1170 -
RS Stock No. 729-2736
Mfr. Part No.1616-21-20A
BrandETA
£11.41
Each
Units
20A 1 6mm 32V dc - - - - - - - -
RS Stock No. 652-3442
Mfr. Part No.0700025
£8.998
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. 854-453
Mfr. Part No.1170-21-10A
BrandETA
£11.34
Each
Units
10A 1 22mm 28V dc - - - - - - 1170 -
RS Stock No. 723-4821
Mfr. Part No.1626-3H-10A
BrandETA
£8.10
Each
Units
10A 1 7mm 29V dc - - - - - - - -
RS Stock No. 723-4819
Mfr. Part No.1626-3H-5A
BrandETA
£8.10
Each
Units
5A 1 7mm 29V dc - - - - - - - -
RS Stock No. 723-4834
Mfr. Part No.1626-3H-20A
BrandETA
£8.51
Each
Units
20A 1 7mm 29V dc - - - - - - - -
RS Stock No. 728-8698
Mfr. Part No.129-L11-H-KF-15A
BrandETA
£11.23
Each
Units
15A 1 11.5mm - - - - - - - - -
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