What it is and what it does
The Siemens 3VA2110-6HN32-0DL0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection — meaning it sits at the incoming feeder or main distribution point, not downstream on a motor or branch circuit. It's a 3-pole unit rated for 100 A continuous at 40 °C, with no derating through 70 °C, so it holds its full ampacity across typical panel ambient temperatures. The interrupting ratings are substantial: 242 kA at 240 V and 187 kA at 415 V, which puts it in the high-fault-current class for industrial switchboards where available short-circuit current is high.
Key ratings and what they mean for fit
The 100 A continuous rating is flat from 40 °C to 70 °C — no thermal derating curve to calculate, which simplifies panel sizing in warm environments. The interrupting rating of 242 kA at 240 V tells you this breaker can safely clear a fault up to that magnitude without rupturing or welding contacts, critical for installations near large transformers or in high-capacity distribution. At 690 V the rating drops to 3.7 kA, so if your system voltage is higher than 500 V, confirm the available fault current stays under that limit. The breaker includes an undervoltage release (UVR) as the auxiliary release type — when line voltage drops below a threshold, it trips the breaker. This is common for emergency-stop circuits or machinery that must shut down on power loss. The supplied basic switch carries order code 3VA21106HN320AA0, and the auxiliary switch configuration is 2 auxiliary switches plus 1 trip alarm switch plus 1 electrical alarm switch HQ, giving you status feedback for remote monitoring or PLC inputs.
Panel integration notes
The MCCB measures 105 mm wide, 181 mm high, and 86 mm deep. That 105 mm width is a standard 3-pole MCCB footprint — it fits in SENTRON panelboards and most universal MCCB mounting bases without adapters. The 86 mm depth means it clears standard 200 mm deep enclosures with room for wiring gutters. Mounting is via the four-bolt pattern typical of SENTRON 3VA frames; no DIN-rail clip on this class of breaker.