What this MCCB does and where it fits
The Siemens SENTRON 3VA1225-6EF42-0HA0 is a 4-pole molded case circuit breaker (MCCB) designed for line protection, with a TM240 thermal-magnetic release that gives a rated current of 250 A at 40 °C — the same rating holds at 45 °C and 50 °C, then derates to 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C. That flat 250 A through 50 °C is useful when the breaker sits in a warm but not hot panel; above 50 °C you lose roughly 7 A per 5 °C step. Breaking capacity runs from 220 kA at 240 V down to 17 kA at 690 V — a high-interrupting rating that covers most industrial service-entrance and feeder applications where fault current is stiff. The shunt trip release (STL) lets a remote signal or safety circuit trip the breaker independently of the overcurrent mechanism, which is standard for emergency-stop or undervoltage-coordination schemes.
Panel fit and mounting
Maximum power loss is 57 W — a figure to consider when calculating enclosure heat rise, especially in sealed stainless-steel boxes where convection is limited.
Lifecycle and compliance
Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The 80 °C storage maximum means it can sit in a hot warehouse or shipping container without damage — that limit governs handling, not running.