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The major differences in the use of circuit breakers in Internal Combustion Engine (ICE) vehicles versus Electric Vehicles (EVs) primarily stem from their fundamental differences in power systems and just how they operate. Here are the main differences that you should know:

1. Voltage Levels:

ICE: Combustion engine vehicles generally use a 12V electrical system. The circuit breakers in these vehicles are designed to protect this lower voltage system, primarily focusing on the vehicle's lighting, ignition, entertainment, and climate control systems.

EV: EVs operate on much higher voltage systems, typically ranging from 400V to 800V or more. The circuit breakers in EVs must be capable of handling these higher voltages and the associated currents, which are significantly greater than in ICE vehicles. However, EVs still utilize low voltage systems, so they require both low and high voltage circuit protection products.

2. Power Source & Distribution:

ICE: In ICE vehicles, the electrical system is powered by an alternator and a battery. Circuit breakers in ICE vehicles are mainly used to protect against overloads and short circuits in auxiliary circuits.

EV: In electric vehicles, the main power source is a large battery pack. Circuit breakers in EVs not only protect the auxiliary circuits but also play a critical role in safeguarding the battery pack, charging system, and other high-voltage components.

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