5v 1a意思

"5V 1A" is a designation used to describe the output of a power supply or the power requirements of an electrical device. It means that the device or power supply is designed to provide 5 volts of direct current (DC) at a rate of 1 ampere.

Here's a breakdown of what each part means:

• "5V" stands for 5 volts. This is the voltage level that the device or power supply is intended to output or require. Voltage is a measure of the potential difference in electrical energy between two points.

• "1A" stands for 1 ampere. This is the current rating, which is a measure of the amount of electrical charge that flows through a circuit per second. In simple terms, it indicates the strength of the electrical flow.

When you see "5V 1A" on a device, it means that the device requires a power source that can provide 5 volts of DC voltage and 1 ampere of current to operate correctly. This information is typically found in the device's specifications or on the power supply unit that comes with the device.

For example, a smartphone charger or power bank might have a label that says "5V 1A" or "5V 2A" if it can provide either 1 or 2 amps at 5 volts, depending on the device it's charging. Similarly, a USB cable might be rated for 5V 1A or 2A, indicating the maximum current it can safely carry.