K-24-L SPD for Signal (24V; 2 wires; In=10kA )

K-5-EX-L SPD for Signal (5V; 2 wires; I

K-5-EX-L3 SPD for Signal (5V; 3 wires;

K-5-EX-L4 SPD for Signal (5V; 4 wires;

K-24-EX-L SPD for Signal (24V; 2 wires;