The innovative PROTACT bell button from Grothe with precious metal switching contacts and time-saving wiring technology for installation in door stations or for industrial applications. The buttons are characterized by optimal switching behavior with tactile feedback and very low bounce times, ideal for use in bus systems.Product features:Maximum reliability thanks to corrosion-free switching contacts with a silver alloy including gold plating Optimal switching behavior thanks to tactile feedback and precise guidance of the button in the button sleeve Very low bounce times thanks to the optimal snap effect of the switching contacts, ideal for BUS intercom systems Short installation time thanks to screwless special terminals: ideal for through-wiring despite extremely compact design Suitable for panel thicknesses up to 6 mm Elegant appearance thanks to high-quality materials and surfacesButton made of stainless steel V2A Button sleeve made of stainless steel V2ATechnical data:IP 54 (when installed, in a vertical panel) Vandalism protection thanks to pressure force limitation (withstands at least 100 N actuation force) Materials: Switch contacts made of chrome-nickel steel with silver alloy and gold plating, housing made of glass fiber reinforced ABS for optimal stability, special terminals made of tinned chrome-nickel steel Installation position: any Min. service life at 12 V~ / 0.75 A (standard bell system) approx. 100,000 cycles (Note: tactile switching behavior up to approx. 30,000 cycles, then continuous switching behavior up to the mechanical service life of 200,000 cycles) Diameter of button 11.5 mm Diameter. Button sleeve 20.0 mm PU 5Installation instructions:Plate hole 16 mm (interchangeable with previous types MKO/KKO) Plate thickness 0.5 mm to 6.0 mm Installation depth 13 mm minus plate thickness (e.g. with 2 mm plate thickness: 11 mm installation depth) Time-saving tool-free installation thanks to easy-grip knurled nut max. 12 V=/~ (1.5 A), min. 5 V (0.001A) Voltage drop when new 0.1 V, contact resistance 0.1 Ohm
| Property | Value |
| With nameplate: | no |
| Mounting type: | Flush-mounted |
| With lighting: | no |
| Material: | stainless steel |
| Height: | 17 mm |
| Installation depth: | 15 mm |
| Shape: | round |
| Wireless: | no |
| Diameter: | 22 mm |
