Keysight (Agilent) E3631A DC Power Supply, ±25 V, 1 A; 6 V/5 A 80 W, Triple

The Keysight E3631A is an 80 W triple-output DC power supply engineered for benchtop test and design applications requiring independent voltage rails. It delivers three isolated outputs: one 0 to 6 V @ 5 A channel and two ±25 V @ 1 A channels. The ±25 V outputs track within ±(0.2% + 20 mV) and can be configured in series for 0 to 50 V @ 1 A operation. Isolation between the 6 V supply and ±25 V supplies reaches ±240 Vdc.

– Technical Specifications

Output Configuration
• Output 1: 0–6 V DC, 0–5 A (30 W max)
• Output 2: 0–+25 V DC, 0–1 A
• Output 3: 0–−25 V DC, 0–1 A
• Total power: 80 W

Regulation & Stability
• Load regulation (voltage): <0.01% + 2 mV
• Load regulation (current): <0.01% + 250 µA
• Line regulation: <0.01% + 250 µA
• Ripple and noise (20 Hz–20 MHz): <350 µV rms / 2 mV peak-to-peak across all outputs
• Transient response: <50 µs recovery to within 15 mV after load-current step

Programming & Readback Accuracy (25°C ±5°C)
• 6 V output: ±(0.1% + 5 mV) voltage; ±(0.2% + 10 mA) current
• ±25 V outputs: ±(0.05% + 20 mV) voltage; ±(0.15% + 4 mA) current

Resolution
• 6 V: 0.5 mV voltage / 0.5 mA current
• ±25 V: 1.5 mV voltage / 0.1 mA current

– Key Features

• Three isolated independent outputs with individual control
• Tracking mode for balanced dual-polarity supplies
• Series-capable ±25 V outputs for extended voltage range
• Low-noise linear regulation with fast transient response
• Maximum isolation to chassis ground: ±240 Vdc

– Typical Applications

• Operational amplifier characterization and biasing
• Analog circuit board development and validation
• Multi-rail discrete component testing
• Educational and lab benchtop use

– Compatibility & Integration

Programmable voltage and current settings with digital readback enable integration into automated test systems. Output isolation supports floating ground applications and reduces cross-coupling in sensitive analog circuits.