At 70 mm deep, 76.2 mm wide, 130 mm tall, it fits a 3-pole MCCB slot in most Siemens SENTRON enclosures and switchboards. The 25 W maximum power loss matters for thermal budgeting in a sealed panel — if you pack six of these side by side, expect 150 W of heat to manage.
Breaking capacity — the number that decides the fault rating
This breaker delivers 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. The steep drop above 440 V reflects the arc-extinction limits of the 3VA platform.
Thermal derating — the curve that governs real current
At 55 °C it drops to 98 A, at 60 °C to 96 A, at 65 °C to 94 A, and at 70 °C to 91 A. If your panel ambient hits 60 °C — common in a packed enclosure next to a furnace line — you lose 4 A of headroom.
Auxiliary configuration and trip indication
If you need UVR or GF, this isn't the variant; look at the 3VA1 with the 'U' or 'F' suffix options.