What this MCCB delivers
The Siemens SENTRON 3VA2010-5HL36-0HL0 is a 3-pole molded case circuit breaker (MCCB) rated 100 A continuous current, built for line-protection duty with an ETU320 electronic trip unit. The 187 kA interrupting capacity at 240 VAC means it can safely clear a fault up to that level without cascading upstream — critical for high-fault panels near large transformers or in industrial mains distribution. At 415 V the breaking capacity holds at 121 kA, dropping to 79 kA at 500 V and 3.4 kA at 690 V; that 690 V figure is the practical ceiling for this frame size in IEC applications.
Trip unit and auxiliary complement
The ETU320 overcurrent release provides adjustable thermal-magnetic or electronic protection curves depending on the variant; this unit ships with a shunt trip (STL) release for remote tripping via a control signal. The auxiliary contact block includes two auxiliary switches, one trip-alarm switch, and one electrical-alarm switch — enough to feed status back to a PLC or annunciator panel without adding a separate module. No undervoltage release, no ground-fault monitoring, and no communication function are fitted on this order code, so if those are needed, plan for an external relay or a different 3VA variant.
Thermal derating and panel fit
The 100 A rating holds up to 50 °C ambient; above that it derates linearly to 85 A at 70 °C. In a sealed panel with limited airflow, that 70 °C ceiling is the operating limit — the storage range (-40 °C to 80 °C) is broader but irrelevant for running duty. Dimensions are 181 mm high, 105 mm wide, 86 mm deep, which fits standard SENTRON 3VA mounting footprints; verify busbar and lug clearance against the existing panel layout, especially the 86 mm depth behind the mounting plane.