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Self-Locking Push Button Switch (6-Pin Push Switch) This **6-pin self-locking push button switch** is a **latching push switch** that changes state each time it is pressed. Unlike a momentary push button, it **remains ON or OFF after being pressed** until pressed again. It is commonly used for **power ON/OFF control, mode selection, start/stop functions, and circuit switching** in electronic equipment, industrial control panels, and embedded systems. Its compact design and reliable operation make it suitable for Arduino, ESP32, STM32, and other microcontroller-based projects.