plug-in circuit breaker, with fixed part, IEC 60947-2, construction size 2, 4-pole, N pole left, In=3200 ... 690V AC 50/60Hz, breaking capacity S Icu=66/50kA with 500/690V, ETU600 LSI tripping unit upgradeable, colour display, Bluetooth, USB interface, basic protection LT, ST, INST, protection including neutral conductor (internal N sensor present), block of contact for trip signalling (1 CO), horizontal rear connections fixed part with shutter and without(*) with communication capability, with manual control and motor drive (M) AC 208-240 V / DC 220-250 V signal contact block springs charged and ready for insertion, auxiliary contact block (aux) 4 NO+4 NC, closing magnet (DC) 100% insertion time DC 24 ... 30 V suitable for continuous operation, remote reset magnet (RR) DC 24 ... 30 V for short-term service without 2nd auxiliary release, shunt coil (ST) 100% switch-on time DC 24 ... 30 V suitable for continuous operation, Option C01 = mechanical switching cycle counter for circuit breakers option M71 = conversion to DC/ST without communication functionality Option N03 = auxiliary conductor connection system with screw connection (SIGUT) instead of push-in technology.