A101MD9AQ04 is a toggle switch from the Gemini Series A family manufactured by TE Connectivity/ALCO. Based on the product naming convention and catalog structure, this switch features single-pole configuration with on-on switching positions and silver (Ag) contact material. The switch is designed for PCB mounting applications, providing reliable electrical switching for general-purpose control circuits. This product is commonly used in consumer electronics, industrial control panels, and equipment requiring manual switching functionality where durability and consistent performance are essential.