Phoenix Contact 2800769 A surge protective device is available as a plug and base element combination with a built-in multi-stage status indicator on the module, designed to safeguard a double wire for use in both analog and digital telecommunications applications such as VDSL up to 50 Mbps over short distances of less than 300 meters or up to 100 Mbps. This device can be integrated into safety-critical circuits with a SIL 3 rating.