Agilent/Keysight 6643A DC Power Supply

The Agilent/Keysight 6643A is a programmable DC power supply delivering 0–20 V at 0–5 A (100 W) for precision testing, research, and device characterization. The unit combines exceptionally tight load and line regulation (≤0.02% + 5 mV) with low output noise (≤1 mV RMS in CV mode, ≤2 mA RMS in CC mode), making it suitable for sensitive analog and power electronics applications. Fast transient response (≤300 µs for 1% voltage change across 50–100% load steps) ensures stable operation under dynamic conditions.

Technical Specifications

Output voltage programs from 0–20 V with 10 mV resolution and ±(0.1% of setting + 0.05% of range) accuracy. Current output spans 0–5 A with 1 mA resolution and ±(0.2% of setting + 0.1% of range) accuracy. Voltage readback achieves ±(0.05% of reading + 10 mV); current readback, ±(0.1% of reading + 2 mA). Analog programming interfaces accept 0–5 VDC inputs (1 V/V for voltage, 1 A/V for current). Remote sensing compensates for output lead losses. The digital front panel displays both voltage and current in real time.

Key Features

• Adjustable overvoltage, overcurrent, and overtemperature protection


• Remote and local output control


• Line regulation ≤0.02% + 5 mV; load regulation ≤0.02% + 5 mV


• Output ripple and noise: 1 mV RMS (20 Hz–20 MHz, CV mode)


• Transient response ≤300 µs (1% settling, 50–100% load transient)


• Dimensions: 5.1 × 16.75 × 14.6 in; weight 24 lbs


• Optional rack mount configuration available

Typical Applications Precision power delivery for analog circuit development, semiconductor device testing, sensor calibration, and laboratory research requiring stable, low-noise supplies with fast response times.

Compatibility & Integration Operates from 47–63 Hz AC mains. Temperature rated 0–50 °C operating; storage −20–70 °C at 20–80% RH (non-condensing). Analog control architecture supports integration into automated test systems via standard voltage/current programming inputs.