The Siemens SENTRON 3VA2225-5JQ32-0KA0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection, rated 250 A continuously at ambient temperatures from 40 °C to 50 °C without derating. At 55 °C it carries 238 A, at 60 °C 225 A, at 65 °C 213 A, and at 70 °C 200 A — so the full 250 A rating holds only up to 50 °C; above that, the thermal derating curve governs the actual continuous current in the panel.
This MCCB delivers 187 kA interrupting capacity at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 4.5 kA at 690 V.
Dimensions are 181 mm height, 105 mm width, 86 mm depth.
Release configuration and communication
No undervoltage release or auxiliary switch fitted. Electronic trip unit set for 250 A full-scale with 50 A initial pickup.