PT 4+F-BE - Phoenix Contact
Surge protection base element - PT 4+F-BE - 2839415; Base element for protective plug PT with protective circuit for a 4-wire floating signal circuit, gas-filled surge arrester between the connections 3-4 (GND) and 9-10, for mounting on NS 35/7.5 and NS35/15, housing width: 17.5 mm