Siemens 3VA2110-5KP32-0AA0 — SENTRON MCCB with ETU850 Trip Unit
The ETU850 electronic overcurrent release handles adjustable trip settings from 150 A minimum to 1 200 A maximum, giving you a wide band for coordination studies without swapping the breaker frame. Interrupting capacity is voltage-dependent: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. That 187 kA figure at 240 V means it can clear high-fault conditions on the secondary side of a distribution transformer without cascading upstream.
Panel Fit and Integration
Dimensions are 181 mm height, 105 mm width, 86 mm depth — a standard MCCB footprint that fits most DIN-rail or panel-mount enclosures. IP40 on the front means the operator interface is protected against tools and small wires, but the body is not sealed for washdown; install in a dry cabinet or behind a gland plate. Rated insulation voltage is 800 V, so the breaker is suitable for 690 V line-to-line systems with margin. Power loss at rated current maxes at 10 W — negligible for enclosure thermal budgeting but worth noting if you pack multiple units in a small cabinet.
Communication and Monitoring
This variant includes a communication function and an other measurement function — the ETU850 supports Modbus RTU or PROFIBUS via a plug-in module, enabling remote trip indication, current metering, and energy data without an external CT block. No undervoltage release or ground-fault monitoring built in, so those functions require add-on modules if your protection scheme demands them.