What this MCCB brings to the panel
The Siemens 3VA2163-7HN36-0AA0 is a SENTRON 3VA molded case circuit breaker rated for 63 A continuous current, with an interrupting capacity of 330 kA at 240 V — that's the short-circuit rating that decides whether this breaker clears a fault upstream or lets it cascade to the transformer. It's a 3-pole, line-protection design with an ETU350 electronic overcurrent release, which means the trip curve is adjustable and more precise than a thermal-magnetic on high-fault installations. The 63 A rating holds flat across the full 40 °C to 70 °C ambient range (–), so no derating needed if the panel runs hot — that's unusual for a breaker this size and saves a headache on a crowded enclosure.
DIN-rail fit and panel integration
This breaker measures 105 mm wide by 181 mm tall by 86 mm deep — the width is the critical dimension for a 3-pole MCCB on a DIN rail or mounting plate. It's a fixed-front IP40 on the front, so it's suited for a closed panel door; no washdown rating, so keep it inside the enclosure.