The Siemens 3VA2163-6HN36-0AG0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current at ambient temperatures up to 50 °C, with no derating needed in that range — above that it steps down to 60.6 A at 55 °C and 53.6 A at 70 °C. The ETU350 electronic trip unit gives you adjustable overload and short-circuit protection curves, which is the main reason you'd pick this over a thermal-magnetic version: tighter coordination with downstream breakers and better nuisance-trip rejection on motor-start inrush. Breaking capacity hits 242 kA at 240 V AC and still holds 187 kA at 415 V and 440 V — that's high enough for most main-service or large-feeder applications where fault current is serious. At 690 V it drops to 5 kA, so if you're on a 690 V system this isn't the right frame size. Three-pole, line-protection version (no voltage trip, no undervoltage release, no ground-fault monitoring). The auxiliary contact package is one NO/NC auxiliary switch plus one trip-alarm switch — enough to signal status back to a PLC or annunciator panel but not a full communication module.
Panel fit
Dimensions: 105 mm wide, 181 mm tall, 86 mm deep — standard SENTRON 3VA2 frame footprint. Mounts on a DIN rail or panel-mount plate. Front face is IP40 rated, so it's fine inside a closed enclosure but not for washdown areas. Power dissipation is 4 W maximum at rated load — negligible for panel thermal budgeting, but worth noting if you're packing a dozen of these in a sealed cabinet.