What this MCCB is and what it does
The Siemens 3VA2063-5HN32-0CA0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection, with a continuous current Iu of 63 A across the 40 °C to 50 °C band — no derating needed up to 50 °C. Above that it steps down: 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. That means in a warm panel you still get most of the rated current, but above 50 °C you size the load side accordingly. Breaking capacity climbs to 187 kA at 240 V, holds at 121 kA at 415 V and 440 V, drops to 79 kA at 500 V, and settles at 3.4 kA at 690 V. For a 480 V distribution panel that 79 kA gives solid headroom over typical available fault currents — you won't be coordination-limited by the breaker in most commercial or light industrial switchboards. It carries an ETU350 electronic trip unit (overcurrent release), an undervoltage release (UVR) as the auxiliary release, and no auxiliary contacts, no communication function, no phase failure detection, and no ground fault monitoring. The trip indicator is absent, so you won't get a local flag — plan for remote signaling if needed.
Panel fit and environmental limits
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or screw-mount panel layouts. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 7.9 W, which is modest for a 63 A frame — no special ventilation required in a typical enclosure.