Three-Leg Custom Limit Micro Switch

The travel switch (also known as a limit switch) is an automatic control component triggered by mechanical motion. Its core function is to detect the displacement or stroke of an object to achieve the opening and closing of circuits, the start and stop of equipment, or limit protection. It is an indispensable 'safety sentinel' and 'action commander' in industrial automation and electromechanical equipment.

The door frame of the refrigerator is equipped with a limit switch. When the door is closed, the switch is pressed, cutting off the power to the internal light of the refrigerator while simultaneously triggering the normal operation of the temperature control system. If the door is not closed properly and the switch is not triggered, the light remains on. Some high-end refrigerators will also emit an alarm to remind users to close the door tightly to reduce energy consumption.

The oven door also features a similar design; if the door is not closed properly, the limit switch cuts off the power to the heating elements, preventing high temperatures inside the oven from leaking out, thus avoiding burns to the user and ensuring stable baking temperatures.