The interrupting ratings tell the real story: 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 3.4 kA at 690 V. At 690 V the 3.4 kA figure reflects the reduced arc-quenching capability at higher voltage; this breaker is sized for 400–500 V distribution, not 690 V main feeds. The ETU320 release provides adjustable thermal and magnetic protection curves, giving the panel designer selectivity headroom downstream. The 63 A rating holds flat from 40 °C to 50 °C ambient, then derates to 60.6375 A at 55 °C, 58.275 A at 60 °C, 55.9125 A at 65 °C, and 53.55 A at 70 °C. In a 50 °C panel enclosure, you get the full 63 A; above that, the derating curve governs continuous load. It is a straightforward line-protection MCCB with a voltage-trigger capability for emergency-off or remote-disconnect circuits.
Panel fit and mechanical data
The 3VA2063-5HL36-0HA0 measures 105 mm wide, 181 mm high, and 86 mm deep — a standard SENTRON 3VA frame that mounts on a DIN rail or panel-mount plate. The 3-pole footprint matches the 3VA family cutout; if you are replacing a 3VA1010-2ED32-0JA0, the width and depth are identical, so the panel layout does not need rework. Maximum power loss is 5.4 W, which is negligible for enclosure thermal budgeting.