These fusible air conditioner disconnect switches have fuses that blow if the connection experiences an electrical overload or short. They shut off power immediately if there is an electrical malfunction to protect high-current industrial equipment. Fuses are sold separately.

These non-fusible disconnect switches don't have fuses to protect against electrical overloads or shorts. Non-fusible disconnect switches are suitable for applications where downstream equipment has its own overcurrent protection.

These non-fusible air conditioner disconnect switches with ground fault circuit interrupters (GFCI) don't have fuses to protect against electrical overloads or shorts. They are suitable for applications where downstream equipment has its own overcurrent protection. GFCI switches stop the flow of power in the event of a ground fault to prevent electrical shocks and protect equipment from damage. They must be manually reset with a button on their front side.