On a 10 A breaker, that's instantaneous trip between 30 A and 50 A, fast enough to protect 1.5 mm² or 2.5 mm² copper wiring in final subcircuits. Breaking capacity is rated at 6 kA Icn per EN 60898 and 20 kA Icu per IEC 60947-2. At 20 kA Icu it clears faults without welding the contacts, which is the number a panel designer checks for coordination with the upstream device. Rated insulation voltage is 440 V, overvoltage category III, which covers fixed-installation distribution boards. The IP20/IP40 rating means the breaker body is finger-safe (IP20) and the terminals, when wired, are protected against solid objects over 1 mm (IP40) — standard for enclosed distribution boards. Mounts on DIN rail, 35 mm wide, 88 mm tall, 69 mm deep — fits a standard modular enclosure with one module width per pole.
Snap-on DIN rail mount, single-module width per pole (17.5 mm per pole, 35 mm total for the 2-pole). Terminal screws take up to 2.8 Nm tightening torque — the bi-directional cylinder lift terminal accepts solid or stranded copper up to 25 mm². For a panel builder, that torque spec means a standard electric screwdriver set to 2.5 Nm won't strip the terminal; hand-tighten the last quarter turn.