The SENTRON 3VA2225-6HN32-0KL0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C, with a maximum interrupting capacity of 242 kA at 240 V AC. Designed for line protection, it carries a shunt trip release (STL) and a full auxiliary switch complement: 2 auxiliary switches plus 1 trip alarm and 1 electrical alarm switch HQ.
Interrupting capacity and thermal derating
At 415 V and 440 V the breaker holds 187 kA, dropping to 121 kA at 500 V and 4.5 kA at 690 V — the steep roll-off above 500 V means this frame is sized for low-voltage distribution, not 690 V motor circuits. Thermal derating begins at 55 °C: 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. If your panel ambient runs above 50 °C, the 250 A nameplate is no longer the usable number.
Physical fit and panel integration
Dimensions: 105 mm wide, 181 mm tall, 86 mm deep. The 105 mm width is standard for a 3-pole MCCB frame in this class — verify the mounting footprint against your existing panel cutout or DIN-rail adapter. Maximum power loss is 48 W, so account for that heat in enclosure sizing if the breaker is enclosed with other high-current devices.
Environmental limits
Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The storage maximum exceeds the operating maximum — that limit governs handling and warehousing, not running conditions.