The TS4550TP with Tactile Switches SMD RoHS is a small, surface-mount switch manufactured by SHOU. It has a total of 4 pins/leads. The switch is RoHS compliant, meaning it complies with environmental and health standards set by the European Union. It is a tactile switch, meaning it uses a physical press-and-release mechanism to trigger an electronic signal. The switch is rated for a maximum contact resistance of 200mO, and a contact current rating of 2A at 125VAC. It is rated for an operating temperature range of -25°C to +85°C, and it can perform up to 1,000,000 cycles. The switch is designed to be used in a wide range of applications, from consumer electronics to industrial automation.