The interrupting capacity is what sets this breaker apart: 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. The 70 mm depth and 76.2 mm width (3-inch footprint) fit standard Siemens SENTRON panel mounting patterns — a direct swap into existing 3VA1-series cutouts.
The 3-pole design occupies a 76.2 mm width — three standard 25.4 mm pole spaces — so it fits standard Siemens SENTRON distribution boards and panelboards without adapters. It ships with a TM240 thermal-magnetic release, which is non-interchangeable in the field — the trip unit is fixed. If you need adjustable thermal or magnetic settings, look at the 3VA2 series with electronic releases. The auxiliary switch block is configured as 3 auxiliary switches HQ (high-qualified), which can be wired for remote status indication or trip alarm. The temperature derating curve shows full 40 A up to 50 °C, then drops to 39 A at 55 °C and 38 A at 65 °C, so derating is minimal in typical 40 °C switchrooms.