Agilent / Keysight E3631A 80W Triple Output Power Supply

The Agilent/Keysight E3631A is an 80W triple-output DC power supply engineered for benchtop and system integration applications requiring independent, simultaneous power delivery to multiple circuits. Three isolated outputs - 0 to 6 V at 0 to 5 A, 0 to +25 V at 0 to 1 A, and 0 to −25 V at 0 to 1 A - deliver precision-regulated power with low ripple and noise. The 0–6 V supply maintains isolation from the ±25 V supply up to ±240 Vdc, enabling flexible circuit configurations.

Technical Specifications

• Output 1: 0 to 6 V, 0 to 5 A


• Output 2: 0 to +25 V, 0 to 1 A


• Output 3: 0 to −25 V, 0 to 1 A


• Total Power: 80 W Ripple & Noise (20 Hz to 20 MHz):


• Voltage: <350 µVrms / 2 mV p-p


• Current: <500 µA rms (6 V and +25 V outputs); <2 mA rms (−25 V output) Load & Line Regulation:


• Voltage: <0.01% + 2 mV


• Current: <0.01% + 250 µA Programming Accuracy (25°C ±5°C):


• Voltage: 0.05% + 20 mV (±6 V and +25 V); 0.1% + 5 mV (−25 V)


• Current: 0.15% + 4 mA (±6 V and +25 V); 0.2% + 10 mA (−25 V) Stability (8-hour):


• Voltage: 0.03% + 1 mV (6 V); 0.02% + 2 mV (±25 V outputs) Transient Response: <50 µsec recovery within 15 mV following ±50% load step Temperature Coefficient: 0.01% + 2 mV (6 V); 0.01% + 3 mV (±25 V) Tracking Accuracy (±25V outputs): ±(0.2% + 20 mV) Isolation: Maximum ±240 Vdc from any terminal to chassis ground

Key Features

• Independent control of three output channels with simultaneous delivery


• Fast transient response and tight load/line regulation


• SCPI-compatible programming via GPIB (IEEE-488) and RS-232


• Front-panel knob and keypads for manual voltage and current adjustment


• Three-setup memory with store/recall capability


• Low output noise: <350 µVrms voltage ripple

Typical Applications Circuit characterization, device testing, and multiline system power delivery requiring independent voltage and current control across isolated rails.

Compatibility & Integration Standard GPIB and RS-232 interfaces with SCPI command set enable straightforward integration into automated test systems and benchtop measurement setups.