D4BS-7AFS

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Snap action and limit switches are generally used for electronic applications. D4BS-7AFS is an improved series of Snap action, limit switches for safety and control applications. It is designed for applications where high accuracy and long service life are required.

D4BS-7AFS offers both mechanical and electrical functions into one package. Its rugged construction is designed for both indoor and outdoor use. Its key features are wide operating range, high reliability, long life and low cost. Its operating temperatue range is from -40 °C to +65 °C.

The main application fields of D4BS-7AFS includes security and safety, control and monitoring, position detection, and temperature and pressure control. In the security and safety field, the switch provides high-accuracy and anti-vibration features which made it suitable for door and windows control, motion detectors, and medical equipment etc. In the control and monitoring field, it is an ideal switch for elevator, escalator and conveyor control purposes due to its high reliability and low cost. In position detection field, it is an ideal choice for keeping track on car position. Lastly, in temperature and pressure control field, due to its wide temperature range and high accuracy, it is ideal for boiler and HVAC systems.

The working principle of D4BS-7AFS involves a contact gap which is held open through mechanical spring force with a certain amount of torque placed on a trigger. When the trigger reaches its set point, the spring force opens the switches connection, allowing current flows to the specified circuit. When the placed force is removed, the contact gap is closed again and current flow is stopped. The wide operating range of the switch also enhances its capacity to open and close multiple times in a single cycle.

D4BS-7AFS provides high accuracy, long service life, wide operating range and flexibility, low cost, and various use cases than any other standard snap action limit switch. Due to its advantages, it is now a widely used switch in many different indoor and outdoor applications.

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