Interrupting capacity — the real-world headroom
At 240 V this MCCB clears 65 kA symmetrical — that is a high-capacity rating for a 2-pole frame, meaning it can sit at the main lug of a 240 V panel without needing a fused disconnect ahead of it. At 480 V the rating drops to 25 kA, and at 600 Y/347 V it is 14 kA. If your service entrance is a 480 V delta with a 30 A feed, 25 kA is adequate for most industrial plant secondary panels; if the available fault current is higher, you need to coordinate upstream or step to a higher-frame 3VA variant.
The continuous current rating is 30 A at 40 °C. At 45 °C it holds 29 A, at 55 °C it holds 28 A, and at 70 °C it holds 26 A. If the breaker is in a non-ventilated enclosure near other heat sources, use the 60 °C or 70 °C column — that 26 A figure is the safe continuous load, not a suggestion.
The 3VA4130-4ED24-0AA0 measures 50.8 mm wide, 129.4 mm tall, and 75.1 mm deep — a compact 2-pole footprint that fits standard DIN-rail or panel-mount enclosures.