1. Precautions when selecting a switching power supply

1) Choose appropriate input voltage specifications.

2) Choose the appropriate power. In order to increase the lifespan of the power supply, an additional 30% rated output power model can be selected.

3) Consider load characteristics. If the load is a motor, light bulb, or capacitive load, and the current is high at the moment of startup, a suitable power supply should be selected to avoid overload. If the load is a motor, voltage backflow during shutdown should be considered.

4) In addition, it is necessary to consider the working environment temperature of the power supply and whether there are additional auxiliary cooling devices. In case of excessively high ambient temperature, the power supply needs to be reduced in output.

5) Select various functions according to the application requirements.

Protection functions: Overvoltage protection (OVP), Over temperature protection (OTP), Over load protection (OLP), etc.

6) Select the required safety regulations and electromagnetic compatibility (EMC) certification.

2. Precautions for using switch mode power supply

1) Before using the power supply, make sure that the input and output voltage specifications match the nominal value of the power supply used.

2) Before powering on, check if the input and output leads are connected correctly to avoid damaging the user's equipment.

3) Check if the installation is secure, whether the installation screws are in contact with the power board components, and measure the insulation resistance between the casing and the input and output to avoid electric shock.

4) To ensure the safety of use and reduce interference, please ensure that the grounding terminal is reliably grounded.

5) Please note that frequent power on and off will affect its lifespan.

6) The working environment and load level can also affect its lifespan.