What this MCCB is and what it protects
The Siemens 3VA2110-6HN36-0DC0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a continuous current rating of 100 A across the full ambient temperature range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel sizing in warm enclosures. Three-pole construction (3P) handles three-phase circuits. The interrupting ratings are substantial: 242 kA at 240 VAC, 187 kA at 415 V and 440 VAC, 121 kA at 500 VAC, and 3.7 kA at 690 VAC. That 242 kA figure at 240 V means this breaker can safely clear a fault on a high-capacity transformer secondary without upstream devices needing to coordinate — useful for large service entrances or industrial sub-distribution. The breaker ships with two HQ auxiliary switches and an undervoltage release (UVR) pre-installed. The UVR trips the breaker when supply voltage drops below a set threshold — a standard requirement for emergency-stop circuits and undervoltage protection schemes in machinery. No ground-fault monitoring is included on this variant.
Physical fit and panel integration
Dimensions: 105 mm wide, 181 mm tall, 86 mm deep. The 86 mm depth is the key constraint for shallow backpanels or enclosed switchboards. Power loss at rated current is 12.5 W maximum. In a sealed, uncooled enclosure that heat must be factored into the thermal budget — at 100 A continuous, the 12.5 W is modest for a single breaker, but a multi-breaker panel can accumulate quickly.