The IP40 front protection means it's splash-proof from the front but not sealed — standard for indoor panel mounting.
The interrupting rating drops as voltage climbs: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at both 500 V and 690 V. For a 400 V panel (common in IEC markets), 154 kA gives generous headroom.
Current rating and thermal performance
Rated 16 A continuous from 40 °C through 55 °C ambient (–), then derates to 15 A at 60–70 °C (–). That's a tight thermal curve — no derating until you cross 55 °C, which is unusual for MCCBs and means this breaker runs cool in a standard 40 °C panel. The 10.6 W maximum power loss is the heat it dissipates at full load; in a dense panel with multiple breakers side by side, that heat adds up, so factor it into your enclosure thermal calculation. The TM220 release is fixed — no interchangeable trip units, no adjustable long-time or short-time pickup. Set it and forget it, which simplifies ordering but means you commit to the 16 A rating for the breaker's life.
Dimensions: 130 mm height, 101.6 mm width, 70 mm depth. The 101.6 mm width (4 inches) is standard for a 4-pole frame in this class; it occupies four 25 mm module spaces on a DIN rail if mounted via the optional adapter, but typically these bolt directly to a mounting plate.