The 0165109NS-1 is a padlockable door interlock switch designed for door interlock mounting without metal shaft extension, manufactured by BACO Controls. It is rated for 25A or 32A switching capacity and features IP65 gasket sealing (indicated by the "-1" suffix), providing enhanced protection against dust and moisture ingress compared to the standard IP40 version. The switch body accommodates 3-pole configurations with additional poles and neutral pole options available, making it suitable for multi-phase industrial control applications. Common applications include machinery safety interlocks, access control systems, and industrial equipment door protection where reliable switching and environmental sealing are required.