Multi-stage selection switch is a versatile product, widely used in the control panel of CNC power switch. Power switch the use, because of their high voltage, high current, the combined use of gold and silver contacts on the control panel of CNC. On the use of power switch, because of their high voltage, high current, the combined use of gold and silver contacts on the control panel of CNC, because of their low voltage, low current, so you should use gold contacts, Since the difference between with the use , so we should distinguish clearly, but generally the product is not clearly marked will both increase the failure rate or poor contact, therefore, the company launched multi-stage switch, with a blue and white two colors indicate high voltage, high current and low voltage, low current, so as to achieve the effect of the work to improve the product life.