... :660V,DC voltage 440V. 1.ApplicationLAY39-22 series button switch, adapted in AC 50HZ( or 60HZ), voltage ... buttonZPSelf lock level buttonMMushroom buttonZPDSelf-locking type flat button with light buttonZMSelf lock mushroom buttonMJMushroom rush buttonMJLDrawing ... grade: Grade 3installation categories:class 2Vibration condition: button switch should be installed at the place without significantly ...