Rated 32 A at 30 °C with a Type B tripping characteristic and a 6 kA breaking capacity per both EN 60898 and IEC 60947-2, it handles final-subcircuit protection in TN/TT systems at 400 V AC, 50 Hz.
Temperature derating and real-world current
At 40 °C it derates to 30.8 A, at 50 °C to 29.5 A, and at 70 °C to 26.9 A — a roughly 16 % reduction from the headline figure. For a panel that runs warm (say 45–50 °C ambient inside the enclosure), the continuous load should be sized against the derated value, not the 30 °C number.
At 72 mm wide (4 modular width units) and 85 mm tall, the 5SU1346-6FP32 occupies four adjacent slots on a standard 35 mm DIN rail. Installation depth is 70 mm; the overall depth including the front face is 72 mm. Supply can enter from either the top or bottom — no mandatory orientation for line/load.