It's a 4-pole (4P) unit, breaking capacity class E — 16 kA at 415 V AC, per EN/IEC 60947-2. That 16 kA figure is the interrupting rating you need for a distribution panel fed by a transformer in the 200–400 kVA range; it clears a bolted fault before the upstream device takes damage.
The TM-D trip unit is thermal-magnetic: the thermal bimetal handles overloads (slow response, I²t curve), and the magnetic coil handles short-circuits (instantaneous above a set threshold). This is a Category A breaker — no intentional short-time delay, so it trips fast on a fault. That's fine for distribution feeders where selectivity comes from upstream devices, not the breaker itself. Overvoltage category III suits it for fixed-installation distribution boards, not the incoming utility side.
Mounting and fit
The 9 mm pitch takes 12 modules of width (108 mm total). Connection is front-front (both line and load from the front) via compression lugs or busbars. Neutral is on the left. The grey RAL 7016 finish is the standard commercial colour for this series. Mechanical durability is 20,000 cycles; electrical durability is 20,000 cycles at 440 V at In/2, and 10,000 cycles at 440 V at full In. That's enough for a distribution breaker that cycles maybe once a week — not for a motor-starting duty that cycles every minute.