What this MCCB does and where it fits
The Siemens 3VA2163-6HN46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Four poles, line-protection design, fitted with an ETU350 electronic overcurrent release. Interrupting capacity hits 242 kA at 240 V, 187 kA at 415/440 V, 121 kA at 500 V, and 3.7 kA at 690 V. That 242 kA at 240 V tells you it's built for high-fault panels — think large transformer secondaries or busway feeds where a standard MCCB would weld shut. The 800 V rated insulation voltage confirms it's rated for 690 V line-to-line systems. IP40 on the front means it's protected against solid objects over 1 mm but not sealed against moisture — standard for indoor switchgear.
Panel fit and footprint
Footprint is 140 mm wide by 181 mm tall by 86 mm deep — that's 5.51 x 7.13 x 3.39 inches. Four-pole MCCB in that width means it occupies the same DIN-rail or mounting-plate slot as a standard 4-pole frame. The 86 mm depth leaves room behind the gland plate for cable bends without forcing a deeper enclosure. No undervoltage release, no voltage trip, no communication module — it's a straight line-protection device, no auxiliary gimmicks to wire around.
What the ETU350 release means for coordination
The ETU350 is an electronic trip unit with adjustable long-time, short-time, instantaneous, and ground-fault protection (though this unit ships without ground-fault monitoring —). That adjustability lets you coordinate downstream breakers without oversizing the main. The 63 A continuous rating is the frame rating; the ETU350 can be set lower for cable protection. No trip indicator — you'll need a separate indicator or rely on the breaker's handle position.