The 3.3 W DC holding power means the coil stays cool in continuous duty, and the 30 million mechanical cycles typical life gives it a long service interval in high-cycle applications like conveyor or pump stations.
Spring-loaded terminals on the main circuit accept 2x (0.25... 2.5 mm²) solid or stranded wire, or 2x (0.25... 1.5 mm²) finely stranded with ferrules. No screw torque to verify; strip and push. The IP20 finger-safe front terminals mean the panel cover can be open for commissioning without exposed live parts.
For Type 2 coordination (contactor remains operational after a fault), use gL/gG 20 A. This is the fusing spec for the main circuit; the contactor itself has no integral overload relay — pair it with a separate SIRIUS overload (e.g., 3RU series) for motor protection.