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A device that interrupts excessive current by melting a metal wire or strip to prevent damage to a circuit.

Automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit.

Protects against electric shock by breaking the circuit when a difference in currents between hot and neutral wires occurs.

Protects electrical devices from voltage spikes by blocking or shorting to ground voltages above a safe threshold.

Breaks the circuit when it detects an unintended electrical arc to prevent electrical fires.

A device often built into motors or transformers that shuts the system down if it gets too hot.

Protects electrical power systems from damages by directing lightning surge voltages to the ground.

Maintains a constant voltage level to electrical equipment regardless of fluctuations in input voltage.

An electronic component with an electrical resistance that varies with the applied voltage, serving as a protector against excess transient voltages.