Rotary drive, black operating knob, for four-hole front mounting, accessory for main and EMERGENCY STOP switch 3LD23/24 for 160A-250A and for main EMERGENCY STOP switch 3LD5 UL for 100A-150A Main and EMERGENCY STOP switch SENTRON 3LD2 for the safe switching off of loads in many areas, e.g. for three-phase motors, air conditioning and ventilation systems, in processing machines in mechanical and conveyor engineering, in the chemical or food and beverage industry. Modular design, quick and easy installation of auxiliary switches, N-PE terminal or 4th pole. Optimum mains isolation from 16 A to 250 A thanks to the lockable rotary drive. Protection class up to IP 65 with encapsulated housing for outdoor applications. Versatile and can be used worldwide thanks to international IEC, UL, CCC and shipbuilding approvals.The 3LD main and EMERGENCY STOP switches are available in a wide range of versions for front mounting, mounting plate, top hat rail or distribution board installation, optionally with direct or door coupling rotary drive. Versions for direct current applications are also available for 3LD2.3LD main and EMERGENCY STOP switches - Consistent safety for users and systems.