Available. The Siemens 3SB3201-0AA51 is a 22mm plastic round pushbutton unit from the SIRIUS 3SB3 series, designed for industrial control and signaling applications. This non-illuminated pushbutton features a flat blue actuator, momentary contact type, and a contact configuration of 1 Normally Open (NO) and 1 Normally Closed (NC) contact. It utilizes screw terminals for secure electrical connections and has an ingress protection (IP) rating of IP66, ensuring resistance to dust and water ingress. The device operates effectively at a maximum AC and DC voltage of 400V, making it suitable for various industrial environments. Please note that this product has been phased out and is no longer available. The recommended successor is the SIRIUS ACT 3SU1 series, specifically the 3SU1100-0AB50-1FA0 model.