This switch have the following function that derived from power-off and under voltage protection:1. Double Pole cut off 2. Brake function with one pole cut off 3. These two versions can be combined with overload protection switch to achieve under voltage and overload protection Widely used in machine tools, large-scale power tools, garden machinery above, belonging to the safety switch, the device not turn on after power off unexpectedly, need to the green start button turn on. 100% New and high quality. Product name: Electromagnetic Push button switch Model: KJD17 Rated Voltage:AC250V Rated Current: 18A(AC-1) 15A(AC-3) Coil Voltage: 220-240V Rated Frequency: 50/60Hz Pin quantity: 5 Pins Degree Protection: IP55 Number of operating Cycles: 5E4 Ambient temperature: T85/55 colour:black Material:plastic size:53x27mm Package Contents: 1 x Electromagnetic Push button switch Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.