What it is and what it does
The Siemens SENTRON 3VA2110-6HN36-0JC0 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's designed for line protection, meaning it sits at the feeder or main distribution point to guard against short circuits and overloads. The interrupting capacity is substantial: 242 kA at 240 V AC, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3.7 kA at 690 V. That kind of headroom makes it a fit for high-fault installations where a standard MCCB would weld shut.
Key ratings and what they mean for fit
The 100 A continuous rating is flat from 40 °C to 70 °C — that's a wide thermal window, so you don't have to oversize for a hot panel or derate for a warm enclosure. The 242 kA breaking capacity at 240 V is the headline number; it tells you this breaker can safely clear a fault up to that level without rupturing. At 690 V the interrupting capacity drops to 3.7 kA, which still covers most industrial line-to-line faults on a 690 V system but is worth noting if your available fault current is higher. The shunt trip release (STL) allows remote tripping via a control signal — useful for emergency-stop or interlock circuits. Power loss is 10 W max, manageable for thermal coordination inside a panel.
Where it goes and how it mounts
This MCCB is a panel-mount device — no DIN-rail clip, so plan for screw-mounting on a backplate or in a distribution cabinet. The footprint is 105 mm wide, 181 mm tall, 86 mm deep. Three poles handle three-phase circuits. It's part of the SENTRON family, which shares a common accessory platform (auxiliary switches, shunt trips, undervoltage releases) across the 3VA range, so stocking one set of spares covers multiple breaker sizes.