The Siemens 3VA2010-8KP46-0AA0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) rated for 100 A continuous current, 4-pole, with an ETU850 electronic trip unit. Breaking capacity runs 440 kA at 240 V, 330 kA at 415 V, and still holds 52.5 kA at 690 V, so it handles high-fault utility feeds and transformer secondaries. The 4-pole design covers three-phase plus neutral, common for IT or TN-S systems where you need full isolation.
The ETU850 trip unit includes a communication function, so you can pull power quality data and trip event logs over the SENTRON bus or PROFIBUS/PROFINET via an external module.
The 140 mm width matches the 4-pole footprint — leave 50 mm clearance above for arc-chute venting per IEC 60947-2. The ETU850 is powered from the line side; no external control power needed for the trip unit. Communication wiring runs to the front accessory slot; verify the correct communication module (e.g., 3VA9988-0AA31 for PROFIBUS) is ordered separately if you need remote monitoring.