Automatic cut-out, 5SY4 Series, 10 kA, B, C and D characteristic Automatic cut-out, 1, 2, 3 and 4-pole DIN rail assembly For use in industry, and in the functional and residential construction sector Voltage rating: 230 V / 400 VAC250 V / 440 VAC AC, 60 VDC / pole Suppression rating: 10 kA Installation depth: 70 mm Siemens RCDs, RCBOs, RCCBs and MCBs Type B characteristic offers instantaneous short circuit response level of 3-5 x normal rated current, making it suitable for circuits with moderate inrush currents such as filament lamps, heating loads and most domestic/small building protection applications.,Type C characteristic offers short circuit response of 5-10 x normal rated current, making it ideal for circuits with higher inrush currents such as motor control and fluorescent lighting installations in industrial buildings where nuisance tripping might occur if a faster type was used. Type D characteristic is designed for high inrush loads. Magnetic trip point - 10 to 20 times In rating. Thermal trip point - 1.13 to 1.45 protector rating. Type AC characteristic ensure tripping for sinusoidal, alternating currents, whether they be quickly applied or slowly to increase.