Product name: Electromagnetic Push button substitute Model: KJD17 KLD-28 CK-21 KLD-28A Rated Voltage:AC250V Rated Current: 18A(AC-1) 15A(AC-3) Coil Voltage: 220-240V Rated Frequency: 50/60Hz Pin quantity: 4/5 Pins Degree Protection: IP55 Number of operating Cycles: 5E4 Ambient temperature: T85/55 This change have the foling operate that derived from power-off and under voltage protection: 1. Double Pole deliver to a halt 2. Brake operate with one pole bring to an end 3. These two variations could be mixed with overload protection swap to attain below voltage and overload defense Widely used in mechanical device tools, large-scale energy tools, backyard package above, belonging to the security switch, the device will not turn on after power off unexpectedly, need to press the golfing green start button will flip on.