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 short 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 short 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: ideally suited for through-wiring despite the extremely compact design Suitable for panel thicknesses up to 6 mm Elegant appearance thanks to high-quality materials and surfacesButton plastic white-gray Button sleeve plastic BlackTechnical specifications:IP 54 (when installed, in a vertical plate) Vandalism protection through 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 optimum 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 constant switching behavior up to the mechanical service life of 200,000 cycles) Button diameter 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 assembly thanks to easy-grip knurled nut max. 24 V=/~ (1.5 A), min. 5 V (0.001A) Voltage drop when new 0.1 V, contact resistance
| Property | Value |
| Color: | black |
| With nameplate: | no |
| Mounting type: | Flush-mounted |
| With lighting: | no |
| Material: | Plastic |
| Height: | 17 mm |
| Installation depth: | 15 mm |
| Shape: | round |
| Wireless: | no |
| Diameter: | 20 mm |
