HomeNewsHow to Choose the Right AC/DC Adapter for Your Devices

How to Choose the Right AC/DC Adapter for Your Devices

2019-06-21

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AC dc adapter converts the main power AC 100-240V input into a smaller usually DC voltage that your small device needs to operate. Often these are required for charging or powering battery operated devices.


The easiest way is to check if your device has a specific power adaptor already available. If you can not find one then you can find out what your device needs to operate, so inspect the device and look for any labels or symbols that indicate either the voltage or mAh/A.


Choosing the right Power Supply specs to make sure you check the following:



  • The adapter output V matched the rated input V of the device. VAC or VDC.
  • The adapter output is greater or equal to the devices rated mAh or A.
  • The plug fits into your device and has the correct polarity. The most common is center positive(+)connectors; also is the less popular center negative(-) connector.


Voltage carries the power and the Amps are the measurement of how much power it consumes, the basic equations are here


W(wattage)=V(voltage) x A(amps)

A(amps)=W(wattage) / V(voltage)

V(voltage)=W(wattage) / A(amps)


Usually, to increase the reliability of the ac dc adapter, we suggest customers choose a unit that has a rating of 30% more power than actual need. For example, if your device needs a 50W source, we suggest that customers choose a adapter with 65W of output power or more. In this way you can effectively increase the reliability of the adapter in your device.

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