Agilent Technologies E3631A Triple Output DC Power Supply

Agilent Technologies E3631A Triple Output DC Power Supply is an 80 W bench instrument that provides three independently adjustable rails: +6 V up to 5 A, +25 V up to 1 A, and −25 V up to 1 A, enabling simultaneous biasing and testing of mixed‑signal circuits from a compact desktop package. It supports remote control and automation via GPIB (IEEE‑488) and RS‑232 interfaces, making it suitable for lab test stands and scripted measurements. Voltage programming accuracy is specified as 0.1% + 5 mV on the +6 V output and 0.05% + 20 mV on both the +25 V and −25 V outputs, with corresponding current‑limit behavior per rail to protect sensitive devices. Originally part of Agilent’s and later Keysight’s lineup, the E3631A remains a reference triple‑output power supply for electronics labs and education, delivering stable, multi‑rail power for dc characterization, op‑amp biasing, and circuit debugging in a single, compact unit.