The Siemens 3VA1225-5EF42-0CH0 is a SENTRON molded case circuit breaker (MCCB) rated 250 A at 40 °C across all 4 poles, with a breaking capacity of 187 kA at 240 V AC — that means it can interrupt a fault current up to 187,000 A at that voltage without welding contacts or venting arc gas into the enclosure. Rated current holds flat at 250 A from 40 °C through 50 °C, then derates linearly to 223 A at 70 °C. The 4-pole design with integrated undervoltage release (UVR) and 2 auxiliary switches plus a trip alarm switch (HQ) makes this a fit for safety circuits where a loss of control voltage must drop the main breaker and signal the PLC. No communication module on board — this is a standalone line-protection breaker, not a power-monitoring device.
Physical fit — panel cutout and mounting
The basic switch variant listed as 3VA12255EF420AA0 suggests a factory-fitted internal accessory configuration. If your BOM specifies that exact sub-variant, the 3VA1225-5EF42-0CH0 includes it.