The 240 suffix indicates the magnetic trip threshold is set at 240 A — 2.4× the 100 A frame rating, which keeps it from nuisance-tripping on motor inrush or transformer energization.
Breaking capacity — what the voltages mean
Breaking capacity varies sharply with system voltage: 121 kA at 240 VAC, 75.6 kA at 415 VAC, 52.5 kA at 440 VAC, and 11.9 kA at both 500 VAC and 690 VAC. On a 480 V panel (common in North America), the 52.5 kA at 440 V is the nearest published figure — expect the actual rating at 480 V to fall between that and the 11.9 kA at 500 V. For a 400 V IEC distribution board, the 75.6 kA figure covers most high-fault scenarios.
Thermal derating — don't size by the nameplate alone
Above that, it derates: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. If the panel ambient hits 60 °C, the breaker's effective continuous current is 96 A — not 100. Power dissipation at rated load is 25 W maximum, which matters for enclosure thermal calculations.
IP40 on the front.
Current production — no end-of-life notice. The 3VA platform is Siemens' active MCCB generation.