The Siemens 3VA2010-5HL32-0AJ0 is a SENTRON molded case circuit breaker (MCCB) for line protection, rated 100 A continuous across the full operating range from 40 °C to 70 °C — no derating needed in a warm panel. Three poles, 800 V rated insulation voltage, and a breaking capacity that starts at 187 kA at 240 V and stays at 121 kA through 440 V, then drops to 75.6 kA at 500 V and 3 kA at 690 V. That high interrupt rating at typical distribution voltages means it can sit at the main or a high-fault subfeed without cascading upstream.
Mounts on a DIN rail or directly to a backplate — the 105 mm width, 181 mm height, and 86 mm depth fit standard MCCB panel layouts.