The Triplett PS305-NIST Single Output DC Power Supply has a 30V/5A output and can be used for bench testing and repair of circuit boards, vocational school/technical school/college level electronics classroom education, field service repair, and hobbyists. The PS305NIST provides Constant Voltage or Current operation with fine and coarse adjustment for both. Readings are displayed on dual 4-Digit LED displays. The PS305-NIST features low ripple and noise, reverse polarity protection, short circuit and overload protection, and fused temperature protection with automatic recovery.