Switching power supply is an essential and important device in daily life, which can be seen everywhere. Without control of the power switch, it is impossible to turn off and on the power supply, resulting in waste of power. Nowadays, power switches on the market are very cheap, but caution should also be taken when choosing.

1、 Choose the appropriate voltage range

Common sense of life tells us that the household voltage is 220V, so if it is a switch for household use, a switch power supply within the 220V range should be selected. However, if there are special requirements for other work, they should be purchased according to the requirements. There are not only 220V but also 110V voltages on the market, and the common 220V type is mostly used.

2、 Power selection

When choosing a switch power supply, power also needs to be taken into account, because power switches are a type of electrical appliance, so they will lose power, and the rated power will be greater than the actual power. For example, if you want a 220V 1500W power switch, the actual selected power switch should be larger than 220V 1500W.
If the selected power is 1500W, using an appliance with a power greater than the power switch will damage the power switch because it cannot withstand high power, so it is better to use a larger power than a smaller one.

3、 Heat dissipation assistance

Because switching power supplies generate heat during operation, a heat dissipation device is required to dissipate the heat generated by the power switch. Without a heat dissipation device, high temperatures can pose a fire hazard. Therefore, when choosing a power switch, it is necessary to choose a switch with a heat dissipation device.

In summary, when choosing a switch power supply, one should choose a switch with a heat dissipation device, as well as a high-power switch to prevent overload caused by low power. In addition, the selection of power switches should have protective devices to prevent users from being electrocuted during use.