Surge arrester for bus systems and video transmission. Surge protection with integrated status display and knife separation for three signal wires with common reference potential. For HF applications and telecommunications interfaces without supply voltage (up to 90 Mbit/s). Device that can be mounted on mounting rails with individual labeling area on the front. Internal protective circuit and QR code with link to online documentation shown on the product page. Integrated disconnection device with optical status display without auxiliary power on the device and option for joint remote signaling of up to 40 protective devices.