Attributes . The zero switching relay with triac (10 A) or alternator output (25 A, 40 A) is an inexpensive solution for resistive loads. The zero switching relay switching relay switches ON when the sinusoidal curve crosses zero and switches OFF when the current crosses zero. The LED indicates the status of the control input. The clip-on cover is securing touch safety to IP 20. Protected output terminals can take cables up to 16 mm2. . Names