Breaking capacity and what it means on the line
The 3VA2463-6JP32-0BL0: This breaker is rated for 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V. That 242 kA at 240 V means it can safely interrupt a fault current up to 242,000 A at that voltage without welding contacts or venting plasma — critical for high-fault panels near large transformers or parallel-fed switchgear. At 690 V the 9 kA rating is the limiting case; if your system fault level exceeds that, this breaker isn't your pick for that voltage tier.
Thermal derating — the real current you get
The 630 A continuous rating is at 40 °C ambient. In a hot panel — say 50 °C — it's good for 570 A; at 60 °C you're down to 510 A; at 70 °C it's 450 A. That's a 180 A drop from the base rating. If you're cramming this into a tight enclosure next to drives or transformers, size the load for the derated number, not the catalog headline.
Built-in auxiliaries and releases
Comes with 2 auxiliary switches plus a trip alarm and an electrical alarm switch (HQ configuration), plus an undervoltage release (UVR). The UVR drops the breaker on voltage sag below the dropout threshold — useful for motor protection or emergency-stop chains where you want the load disconnected when control power fails. Communication function is onboard, so it can talk to a BMS or PLC for remote trip indication and load monitoring.
Physical fit and panel integration
Dimensions are 248 mm high, 138 mm wide, 110 mm deep. That 138 mm width is a standard 3-pole MCCB footprint — it'll drop into most panel-mounted breaker brackets without re-drilling the gland plate. The 110 mm depth leaves room for rear bus connections in a standard 600 mm deep enclosure. Max power loss is 164.5 W at full load; factor that into your panel thermal budget if you're stacking multiple breakers.