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Stratum 400 MCBs Professional range of 5SY4 series miniature circuit breakers from Siemens. These circuit breakers have type C characteristics that offer short circuit responses and provides protection at a supply voltage of 400 V. The breaking capacity in the event of short-circuit current is 10 kA. The 5SY4 series circuit breakers are available with either 1 or 3 pole and can be used in industrial applications. All models are highly reliable and excellent quality. Terminal Capacity: 35 mm square (Solid and stranded - Upper and Lower Terminal); 25 mm square (Finely stranded with end sleeves - Upper and Lower Terminal) IP Rating: IP20 (according to DIN 40 050); IP40 (When mounted in distribution boards) Standards Standards: EN 60898; DIN VDE 0641; Part 11; IEC 60898 Standards EN 60898; DIN VDE 0641; Part 11; IEC 60898 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.
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