• Single channel DC power supply
• 0-18V / 0-5A
• Two built-in digital displays
• Coarse and fine voltage control
• Constant current / constant voltage operation

The 3000 Series is a single-channel-output DC power supply with features including:

• Constant voltage and constant current output
• Short circuit and external input protection
• Allows serial or parallel connection with the same power supply model

The 3000 Series operates automatically between constant voltage (CV mode) and constant current (CC mode) by responding quickly to rapid load changes. The image to the right shows the relative changes between the constant current and the constant voltage modes.

Serial connection allows the connection of two or more power supplies serially to obtain a higher voltage rating. For serial connection, it is recommended that all power supplies operate under the constant voltage (CV) mode.

The images below show connections between two 3303D power supplies. One unit is set at 30V/2A and the other at 20V/3A. The image on the right shows the serial connection voltage/current output versus load changes.

Parallel connection only allows the connection of two or more power supplies of the same model to obtain a higher current rating.

The images below show connections between two 3303D power supplies. One unit is set at 30V/3A and the other at 20V/2.5A. The image on the right shows the parallel connection voltage/current output versus load changes.

The difference between the voltage settings for two or more power supplies of the same model connected in parallel should not exceed 15V. The minimum voltage setting should not be lower than 10V. If it is necessary to be lower than 10V, the voltage difference should be less than 2V. The closer to 0V the smaller the difference required.