For a distribution panel feeding motor control centers or a main switchboard, this breaker gives you Category B utilisation — meaning it's designed for selectivity coordination downstream, not just cable protection.
Mounting support is a rail base plate — not a standard DIN rail. The 70 mm connection pitch without spreader means you need matching busbar or cable lugs at that spacing. Rear connection location: plan your cable entry and bending radius behind the panel. The neutral pole is fixed on the left; verify your system's neutral phasing before wiring. Electrical durability is 5,000 cycles at 440 V AC without maintenance under Category B. That's typical for a distribution breaker that sees infrequent switching — not a motor-starting duty cycle. The 35 ms maximum breaking time and 70 ms maximum closing time are the mechanical stroke limits, not the arc-extinction time. The 4P 3d protected poles description means three poles have thermal-magnetic protection; the fourth pole (neutral) is switched but not protected. Verify your system's neutral protection requirements.