What this MCCB delivers for a 15-year panel strategy
The Siemens SENTRON 3VA2225-7HN32-0CL0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C, with a 330 kA interrupting capacity at 240 V AC — a figure that drops to 242 kA at 415 V and 187 kA at 500 V, then to 4.5 kA at 690 V. That interrupting curve tells you this breaker is sized for high-fault infrastructure, not light commercial distribution. The 250 A rating holds flat through 50 °C, then derates to 241 A at 55 °C and 213 A at 70 °C, so the thermal margin is generous for a 200 A continuous load in a 40 °C panel. Designed for line protection, this MCCB includes an undervoltage release and a full auxiliary switch complement: two auxiliary switches, one trip alarm switch, and one electrical alarm switch (HQ type). The trip indicator is present, and there is no voltage trigger or communication function — this is a standalone protective device, not a networked power manager. Power loss at rated current is 50.5 W, which matters for enclosure thermal calculations in a sealed cabinet.
Integration and fit
Physical dimensions are 181 mm high, 105 mm wide, and 86 mm deep — a 3-pole MCCB footprint that fits standard Siemens SENTRON mounting bases and busbar systems. The depth of 86 mm (3.39 in) is the dimension from the mounting plane to the rear of the case; verify clearance behind the panel for the arc chamber and wiring channels. The width of 105 mm (4.13 in) governs the DIN-rail or screw-mount pitch — standard for a 250 A frame in this family. Operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C. The undervoltage release (UVR) is factory-installed; verify coil voltage against the control circuit before commissioning. The auxiliary switch complement (2 aux + 1 trip alarm + 1 electrical alarm) provides sufficient status feedback for a PLC-based motor control center without an external interface module.