It carries 63 A continuously at 40 °C and holds that rating up to 50 °C, then derates to 58 A at 70 °C — so in a warm enclosure you lose about 5 A, which matters when sizing for a continuous load. Breaking capacity hits 52.5 kA at 240 V AC and 32 kA at 415 V, which puts it in the high-fault tier for a 63 A frame — enough for most industrial service-entrance or sub-distribution boards.
That means it's still a standard catalog item through Siemens distribution, not a legacy part you'd have to broker.
The UVR drops the load if supply voltage falls below a threshold, which is common for emergency-stop or power-loss interlocks. Mounting dimensions are 130 mm tall, 76.2 mm wide, 70 mm deep — standard 3-pole MCCB footprint for a 63 A frame. It fits the same DIN-rail or panel-mount cutout as other SENTRON 3VA breakers, so swapping in a different rating doesn't rework the enclosure.