The SP-12SB with Switch: push-button is a momentary contact push-button switch manufactured by Sungmun. The switch has two pins, a normally open (N/O) contact and a normally closed (N/C) contact, which are connected to terminals on the switch when pressed. The switch is rated for 3A/250VAC, is IP65 rated for dust- and splash-proof operation, and is UL, CE and RoHS compliant. The switch is a heavy-duty, single-pole, single-throw (SPST) switch with a locking nut for secure installation. It is suitable for use in equipment requiring momentary contact operation such as alarm systems, automation control, and other electronic control systems.