12v 5a意思

"12v 5a" is a rating for a power supply or a device that describes its input or output voltage and current capacity. Here's what each part means:

• 12v: This is the voltage rating. It means that the device or power supply is designed to operate at (or provide) a voltage of 12 volts.
• 5a: This is the current rating. It means that the device or power supply is capable of delivering (or requiring) a current of 5 amperes (amps).

When used in the context of a power supply, "12v 5a" typically refers to the output specifications. For example, a power supply with an output rating of 12v 5a can provide up to 12 volts of DC (direct current) power at a maximum of 5 amps. This means it can supply a total of 60 watts (volts x amps = 12v x 5a = 60w) to a device that requires 12-volt power.

If you see "12v 5a" on a device, it typically indicates the input voltage and current requirements for that device. For instance, a laptop might have a label that says "Input: 12v 5a", which means it needs a power supply that can provide 12 volts DC at 5 amps to operate correctly.

In summary, "12v 5a" is a rating that specifies the voltage and current capabilities of a power supply or the power needs of a device.