What this 100 A MCCB does on a line
The Siemens SENTRON 3VA2110-0HL46-0AA0 is a 4-pole molded case circuit breaker rated for 100 A continuous current, with an ETU320 electronic trip unit that lets you adjust N-conductor protection (OFF, 50%, or 100%) without swapping hardware. At 415 V it interrupts faults up to 440 kA — that's a high SCCR for a 100 A frame, sized for large transformer secondaries or busway feeds where fault current is severe.
The 3VA2110-0HL46-0AA0 measures 86 mm deep, 140 mm wide, and 181 mm tall — a compact 4-pole footprint for a 100 A frame with a 440 kA interrupt rating. No undervoltage release or shunt trip fitted from the factory, and no communication module onboard — it's a standalone line-protection breaker, not a smart breaker out of the box.
Trip unit and protection features
The ETU320 electronic trip unit provides LSI protection (long-time, short-time, instantaneous) plus ground-fault detection — though this variant ships without a ground-fault monitoring module. N-conductor protection is configurable via DIP switches to OFF, 50%, or 100% of the phase rating, which is useful for 4-wire systems where the neutral may need reduced or full protection.