The Siemens SENTRON 3VA2110-5HN36-0AH0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. It carries a line protection designation (product version: line protection) and uses an ETU350 electronic trip unit. The interrupting ratings are substantial: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. That 187 kA figure at 240 V means it can safely clear a fault at the full available short-circuit current of a large industrial service entrance without the breaker failing or the arc flashing upstream — a critical spec for high-fault panels.
Panel footprint: 105 mm wide, 181 mm tall, 86 mm deep. That 86 mm depth is the dimension from the mounting surface to the front of the breaker — important when the enclosure door clearance is tight. The auxiliary contact configuration is 2 auxiliary switches plus 1 trip alarm switch (HQ version), which gives you a separate signal for trip events versus normal open/close status. No undervoltage release, no ground-fault monitoring, no communication function on this variant — it's a straight line-protection breaker with the ETU350 doing the overcurrent sensing.