What type of assembly includes an electrically held contactor and motor overload protection?

The correct choice is indicative of a component commonly referred to as a motor starter. A motor starter is specifically designed to engage and disengage the power supply to an electric motor, and it typically includes an electrically held contactor as well as overload protection.

The electrically held contactor allows the motor to start and stop by controlling the power flow, which is essential for safe operation. The overload protection is a critical feature that prevents damage to the motor from conditions such as overheating, excessive current, or phase failure. This dual functionality is what distinguishes a starter from other options.

In contrast, contactors primarily handle the switching of electrical circuits but may not include overload protection directly. Disconnects are designed to isolate electrical circuits for maintenance and do not have the functionality to control motor operation in the same way. Relays serve as electrically operated switches but are not typically used for motor control applications like starters are.