The Schneider Electric A9K23101 is a 1-pole Acti9 iK60 miniature circuit breaker rated 1 A at 30 °C, B-curve trip characteristic, with a 6 kA breaking capacity at 230 V AC.
Width is 18 mm (2 x 9 mm pitches), depth 78.5 mm, height 85 mm. Clip-on mount to standard DIN rail. Tunnel terminals accept 1 to 25 mm² rigid or 1 to 16 mm² flexible; strip 14 mm, torque to 2 N·m. IP20 finger-safe front, so it's fine inside a closed panel but not for wet locations.
Built and certified to EN/IEC 60898-1. Rated insulation voltage 440 V AC, overvoltage category III, pollution degree 2. Limitation class 3. Suitable for isolation per the same standard. Thermal-magnetic trip unit, 10,000 electrical cycles, 20,000 mechanical cycles.