What this MCCB delivers
The Siemens SENTRON 3VA2010-5HN32-0AJ0 is a 3-pole molded case circuit breaker rated for 100 A continuous current at 40 °C, with an electronic ETU350 trip unit. Its interrupting capacity hits 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 3.4 kA at 690 V — meaning it can clear high-fault currents at common distribution voltages without upstream coordination headaches.
Thermal derating and panel fit
The breaker carries its full 100 A rating from 40 °C up to 50 °C, then derates linearly to 85 A at 70 °C. In a warm enclosure — say a non-ventilated panel near a drive — that derating curve is the real limit, not the nameplate. Dimensions are 105 mm wide, 181 mm high, 86 mm deep; it occupies three standard MCCB mounting slots on a DIN rail or panel-mount base plate.
Trip unit and auxiliary contacts
The ETU350 electronic trip unit provides adjustable overload and short-circuit protection without a voltage trigger or undervoltage release. It ships with 2 auxiliary switches plus 1 trip alarm switch (HP version), so you get separate signaling for breaker position and fault condition. No ground-fault monitoring, no phase-failure detection, no communication module — this is a straight line-protection breaker, not a power-monitoring device.