What this MCCB carries — and what it means on the line
The Siemens SENTRON 3VA2225-5JQ32-0HA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection at 250 A continuous current (Iu). Its ETU560 electronic trip unit gives you adjustable overload and short-circuit protection curves, plus integrated ground-fault monitoring via summation current formation on the L-conductor — meaning it can detect leakage to ground without a separate GFCI module. The shunt trip (STL) allows remote tripping from a PLC or emergency-stop circuit. Breaking capacity is voltage-dependent: 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 5.1 kA at 690 V. At 690 V the 5.1 kA figure is the limiting factor — verify your available fault current at that voltage before specifying. The 250 A rating holds from 40 °C through 50 °C ambient; above that, derate to 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. Panel builders should account for the 48 W maximum power loss in enclosure thermal calculations.
Physical fit and panel integration
Dimensions are 181 mm high, 105 mm wide, 86 mm deep. It mounts on a DIN rail or can be screw-fixed to a backplate. The 105 mm width is standard for a 3-pole frame in this class — it will fit the same panel cutout as other SENTRON 3VA frames of similar rating. No auxiliary contacts are included (auxiliary contact version: without), so if you need status feedback to a PLC, plan for a separate auxiliary switch block.
Trip unit and integrated functions
The ETU560 overcurrent release provides electronic protection with adjustable settings. Communication function is present (Communication Function: Yes), which means this breaker can integrate with a higher-level monitoring system — useful for power management or predictive maintenance setups. The voltage trigger (Voltage trigger: Yes) enables undervoltage or overvoltage tripping scenarios. Ground-fault monitoring uses summation current formation on the L-conductor, not a separate neutral CT; verify your system grounding matches this scheme.