The Siemens SENTRON 3VA2110-5HL36-0AC0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current at 40 °C, with a line-protection ETU320 electronic trip unit. Its interrupting capacity hits 187 kA at 240 V AC and 121 kA at 415 V AC — numbers that put it squarely in high-fault-duty panels where upstream SCCR headroom is critical.
Breaking capacity and derating — what the ratings mean for the panel
The 187 kA at 240 V AC and 121 kA at 415 V AC are the maximum fault currents this MCCB can safely interrupt without welding contacts or rupturing the case. That level of interrupting capacity is typical for main feeders in industrial switchboards where the available fault current from the transformer can exceed 100 kA. At 690 V the rating drops to 4.25 kA — still enough for most motor-circuit faults, but the real headroom lives at the lower voltages. The 100 A continuous rating holds flat from 40 °C to 50 °C (–). Above that, derating kicks in: 96.25 A at 55 °C, 92.5 A at 60 °C, 88.75 A at 65 °C, and 85 A at 70 °C. If the panel ambient runs hot — say inside a non-ventilated enclosure near a drive — size the load to the derated figure, not the nameplate 100 A.
Mounting and panel fit
The MCCB measures 105 mm wide, 181 mm high, and 86 mm deep. It mounts on a DIN rail or directly to a backplate via the screw terminals. The IP40 front protection means it's splash-proof from the front but not sealed — keep it inside a panel enclosure, not in a washdown zone. The 2 HQ auxiliary switches provide status feedback for the PLC or HMI without a separate contactor block.
Selectivity and coordination notes
With an ETU320 electronic trip unit, the breaker offers adjustable long-time pickup, short-time pickup, and instantaneous settings — not just a fixed thermal-magnetic curve. That adjustability lets the panel designer achieve full selectivity with downstream 100 A or smaller breakers, so a fault on a branch doesn't take out the main feeder. The 800 V rated insulation voltage covers 480 V and 600 V class systems with margin.