What it is and what it does
The Siemens SENTRON 3VA2225-6JP32-0AE0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current at 40 °C, designed for line protection in industrial power distribution. It carries a communication function for integration into networked energy management systems.
Breaking capacity — what the ratings mean for fit
This MCCB delivers 242 kA breaking capacity at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 4.5 kA at 690 V. These figures tell you the maximum fault current the breaker can safely interrupt at each voltage level — critical for ensuring the device coordinates with upstream protection and withstands the available fault current at its installation point. At 690 V the 4.5 kA rating is modest; verify the system's prospective short-circuit current at that voltage before specifying.
Thermal derating and panel integration
The breaker holds its full 250 A rating up to 50 °C ambient, then derates linearly to 200 A at 70 °C. In a sealed, high-ambient panel — common in process plants or near ovens — the 70 °C derated figure (200 A) is the one to size your load against. Maximum power loss is 48 W, which contributes to enclosure heat rise and should be factored into the thermal budget. Dimensions: 105 mm wide, 181 mm high, 86 mm deep — standard MCCB footprint for a 3-pole frame at this rating.