FSM4JH is a tactile pushbutton switch designed for through-hole printed circuit board mounting with vertical orientation. It features a 50mA contact rating, momentary on-off operating function, and a single actuator with extended profile. The switch incorporates a round black polyacetal resin actuator with an actuator force of 160g (5.648 oz) and a length of 1.40 mm (0.055 in), providing tactile feedback during operation. The housing is constructed from polyamide material with silver-plated copper alloy contacts, and the switch height is 5.00 mm (0.196 in). This RoHS and ELV compliant component is suitable for applications requiring reliable tactile feedback in compact form factors, such as consumer electronics, industrial controls, and instrumentation devices.