What this MCCB delivers
The Siemens 3VA2225-6KP32-0CC0 is a SENTRON molded case circuit breaker rated for 250 A continuous at 40 °C, with a maximum breaking capacity of 242 kA at 240 V AC. That 242 kA figure at 240 V means it can safely interrupt a fault current up to that level without cascading upstream — critical for high-fault panels near large transformers or utility feeds. At 415 V and 440 V it still holds 187 kA, and at 500 V it delivers 121 kA, dropping to 4.5 kA at 690 V. The 250 A frame is the same across the 40–50 °C range; above that it derates to 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C — so if your panel ambient runs hot, size for the derated figure, not the nameplate.
Built-in release and communication
This unit ships with an undervoltage release (UVR) and two auxiliary switches (HQ design). The UVR trips the breaker when supply voltage drops below a threshold — standard for safety circuits where a loss of control power must open the main contacts. The auxiliary switches provide status feedback to a PLC or annunciator. Communication function is present, so it can integrate with a higher-level monitoring system over the SENTRON bus or a compatible gateway. The breaker is designed for line protection, not motor protection — no ground-fault monitoring version is fitted.
Panel fit and dimensions
Three-pole construction in a 105 mm wide, 181 mm tall, 86 mm deep envelope. The 86 mm depth is the dimension from the mounting surface to the farthest projection — important when planning gland-plate clearance or door swing. Width of 105 mm is standard for a 250 A frame MCCB; it occupies three 35 mm DIN spaces if mounted on a DIN rail adapter, or bolts directly to a mounting plate. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.