The Siemens SENTRON 3VA2225-6KP32-0BC0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current at 40 °C, with a breaking capacity of 187 kA at 415 V AC. It is designed for line protection in industrial distribution panels and switchgear assemblies.
Breaking capacity and thermal derating
The interrupting rating varies significantly with system voltage: 242 kA at 240 V, 187 kA at both 415 V and 440 V, 121 kA at 500 V, and 4.5 kA at 690 V. This means the breaker is sized for high-fault-capacity 400 V class installations, but the 690 V figure limits its use in 690 V systems to lower-fault locations. Thermal derating is flat at 250 A from 40 °C through 50 °C, then steps down: 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. For a panel running at 55 °C ambient, the usable continuous current drops to 238 A — plan your load margin accordingly.
Integrated accessories and communication
This variant ships with an undervoltage release (UVR) and two HQ auxiliary switches factory-installed. The UVR trips the breaker when control voltage drops, which is standard for emergency-stop or undervoltage protection schemes. Communication function is built in, supporting integration with higher-level monitoring systems. The basic switch component is order code 3VA2225-6KP32-0AA0 — the core switching mechanism without the added releases. If you already hold that base unit, the 0BC0 variant adds the UVR and aux switches as a factory-assembled package.
Physical fit and panel integration
Dimensions are 86 mm deep, 105 mm wide, and 181 mm tall. The 105 mm width is standard for a 3-pole MCCB in this class — verify the DIN-rail or mounting-plate spacing in your enclosure, particularly the depth clearance for the rear terminals and the UVR wiring.