The ST-1133-J is a tactile switch manufactured by RI SHENG that features a surface-mounted design and is RoHS compliant. The switch has a rated operating temperature of -25°C to +85°C and an electrical life of 300gf at 1,000,000 cycles. It has a contact resistance of =50mohm, an insulation resistance of =100Mohm, and an operating force of 4.0±0.5N. The switch features a 4-terminal design, with holes for pins of 1.6 x 0.8mm with a maximum travel length of 0.5mm. It is available in a range of colors, including beige, yellow, white, blue, and green.