Convert AC voltage to clean, predictable DC voltage for powering highly sensitive devices, such as measuring, testing, and audio equipment. These power supplies keep electronic interference (also known as output noise or ripple noise) from being passed on to your device.

Although they create less noise than switching power supplies, these power supplies are larger, heavier, and give off more heat. Their efficiency rating is also lower than switching power supplies, which means more energy is lost while they convert AC to DC power. The lower the efficiency rating, the higher your operating costs.

Designed with linear voltage regulation, these power supplies produce the same voltage regardless of changes in the input voltage or the amount of current being drawn. They are also known as linear power supplies. As they send power to a device, they use remote voltage sensing to check for any drops in the voltage. If the voltage dips, they can compensate with extra power, so connected devices always receive the correct voltage. They cannot be sold to California and Vermont due to local energy efficiency requirements.

All of these power supplies meet U.S., Canadian, and European safety standards. If you exceed the maximum load or current, they shut down to protect both the power supply and the connected equipment. Power supplies with overvoltage protection will also shut down if you exceed the maximum voltage.

Covers keep you from accidentally touching the power supply interior, protecting you from shocks. However, these covers reduce the power supply’s maximum output by 15%.