Characteristic E is the tripping curve here — it's a delayed thermal-magnetic release designed for circuits with moderate inrush, like groups of fluorescent lighting or small transformers.
At 40 °C it derates to 47.5 A, at 50 °C to 45 A.
Snap-on standard rail (DIN rail) mounting. 6 modular width units (MW) wide — that's about 108 mm on the rail. The 128 mm height and 76.3 mm depth fit a standard distribution board depth; the depth figure is the body only, not including the handle throw or conductor bend radius. Terminals accept solid or stranded copper from 2.5 mm² up to 50 mm² — covers the range from a 6 mm² subfeed to the 35 mm² or 50 mm² main feeder. Saddle terminals and box-terminal infeed are both present; the locking device (integrated slide, lockable with a padlock, wire seal, or cable tie) is useful for utility-metering or safety-disconnect applications where unauthorized operation must be prevented. Sealable, per the evidence — the enclosure can be sealed to prevent tampering, which is often a requirement for revenue-metering or landlord sub-metering installations.
Shock resistance is rated at 30 g for at least 3 impacts of 11 ms duration — that's the mechanical robustness for transport and seismic events, not a continuous vibration spec. For applications with sustained vibration (near a large motor or compressor), you'd want additional dampening or a different mounting method.