Installation contactor, 2-pole, 1 N/O (1-2) + 1 NC (R3-R4). Ith - 20 A. AC1/AC7a - 4 kW / 230 V. AC3/AC7b - 1.3 kW / 230 V (only for N/O). DC1 - 0.5 A / 220 V. Coil 230 V AC/DC - terminals: (+)A1 - (-)A2. Dimensions: 85 x 17.5 x 65mm. Mounting on a 35 mm rail. IP 20.