The PTS840ESDGMSMTRLFS is a momentary, single pole, single throw, push-button switch manufactured by C&K. It is a 1.8mm (0.071") square, 4.2mm (0.165") high, top-actuated switch with a non-illuminated, stainless steel actuator. The PTS840ESDGMSMTRLFS has a snap-in mounting feature, an ESD contact design which meets IEC 61000-4-2 standards, and code 1 (2.8 +/- 0.2 N) actuation force. The switch is rated to 1 Amp, and is RoHS compliant.