Power Supplies — Buy & Sell Used Power Supplies

Power supplies divide into simple bench units and programmable/system supplies, and that distinction sets the rest of the decision. The core specs are output voltage, current, and power; regulation and output ripple/noise; the number of outputs; and the control interface. If you need automated test sequencing or remote control, look for programmable models with GPIB, LAN, or USB. Specialized variants matter too: source-measure units (SMUs) source and measure precisely on the same terminals, electronic loads sink power, and regenerative supplies return energy to the line.

On the used market, value tracks power rating, programmability, and — for modular systems — the installed modules. Keysight's modular N6700 mainframes, Chroma, Kikusui, Sorensen, and R&S NG-series supplies derive much of their worth from option cards and the power modules fitted, so a mainframe is only as valuable as what's inside it. Interface and feature options add value, and for precision sourcing a current calibration certificate commands a premium. When you request a quote, list the modules, outputs, and interfaces.

Refurbished power supplies typically save 40-70% off list with identical performance on mature designs. Programmable bench supplies and modular system mainframes both offer strong value, particularly higher-power and multi-output units where new prices climb quickly. Whether you're sourcing a unit or retiring one, send us the model and its configuration and we'll quote within one business day.