The ZR 236-11Z-M20 is a roller plunger limit switch manufactured by SCHMERSAL. With a current rating of 4A and a voltage rating of 500V, this switch is designed to provide reliable and accurate control. Its 1NO contact and 1NC opener configuration, along with the M20 cable entry, make it suitable for various applications. The durable construction ensures long-lasting performance and the easy installation process simplifies setup.