That 20 A holds flat from 40 °C up to 55 °C, then derates to 19 A at 60–70 °C — no head-scratching over summer ambient spikes (–). The 187 kA breaking capacity at 240 V means it can interrupt a massive fault without upstream coordination issues; at 415 V it still clears 121 kA, and at 690 V it holds 17 kA. IP40 on the front keeps tools and fingers out but isn't washdown-rated — this lives inside a panel.
The 3VA1120-5EF46-0AA0 measures 70 mm deep, 101.6 mm wide, 130 mm high (–). That 101.6 mm (4 in) width for a 4-pole MCCB is standard — it fits the same DIN-rail or mounting-plate footprint as other SENTRON 3VA frames. The TM240 release is fixed thermal-magnetic, not electronic, so no auxiliary power needed for the trip unit. Ground-fault monitoring is absent; if you need that, look at the 3VA variants with the optional GF module.