The HP 6203B Power Supply is a low-cost bench supply rated at 0 to 7.5Vdc @ 3A. The unit is equipped with ten-turn voltage and current controls. The unit is metered and has CV/CC. Option 011: Internal Overvoltage Protection Crowbar. Option 028: 230 VAC ±10%, single phase input. Option 100: 87-106 Vac, 47-63Hz, single phase input. Option 220: 191-233 VAC, 47-63Hz, single phase input. Option 240: 208-250 Vac, 47-63Hz, single phase input.