FSM104 is a sealed tactile switch from the Alcoswitch brand featuring a 0.472 inch (12 mm) square body with a flush actuator configuration designed for surface mount applications. The switch utilizes stainless steel contacts with silver plating, a thermoplastic case (UL94V-0 rated), and a silicone rubber seal rated to IP67 for environmental protection. It delivers a contact rating of 50 mA at 12 VDC, with an initial contact resistance of 100 milliohms maximum and an actuation force of 160±70 grams-force. The switch offers exceptional durability with up to 1,000,000 cycle life expectancy and operates reliably across a temperature range of -4°C to +85°C, with an actuation travel of 0.014 inches (0.35 mm). These characteristics make FSM104 ideal for sealed applications requiring high reliability, such as industrial control panels, medical devices, and outdoor equipment where moisture and contamination resistance are essential.