The Schneider Electric A9P55706 is a 3P+N miniature circuit breaker from the Acti9 iC40H series, rated 6 A with a C-curve trip characteristic. It delivers a 10 kA breaking capacity (Icn) at 400 V AC, certified to EN/IEC 60898-1 — that means it safely interrupts a 10 kA fault current on a 400 V line without welding its contacts or cascading damage upstream. The thermal-magnetic trip unit gives it the standard C-curve magnetic threshold of 5 to 10 times In, so it's sized for general-purpose distribution loads where moderate inrush (lighting banks, small motor groups, control transformers) is expected.
The 3P+N configuration with neutral on the left and three protected poles means it fits a 4-module width (54 mm, 6 x 9 mm pitches). Tunnel terminals accept 1 to 16 mm² rigid or 1 to 10 mm² flexible cable; strip length is 14 mm, torque to 2 N·m. IP20 on the terminals, IP40 on the modular enclosure — fine for a clean indoor distribution board, not for washdown zones.