Agilent/Keysight 6621A DC Power Supply

The Agilent/Keysight 6621A is an 80 W dual-output linear DC power supply engineered for automated test equipment (ATE) requiring precise voltage and current control. This 3U rack-mounted instrument delivers isolated outputs with dual-range capability, low-noise performance, and fast programming for reduced test cycles and improved measurement accuracy.

Technical Specifications

• Two isolated, programmable outputs with dual-range operation


• Low Range: 0–7 V, 0–10 A per output


• High Range: 0–20 V, 0–4 A per output


• Outputs may be connected in parallel or series for application flexibility


• Total system power: 80 W Programming and Readback Accuracy (at 25°C ±5°C)


• Voltage programming: ±0.06% + 19 mV


• Current programming: ±0.16% + 100 mA


• Voltage readback: ±0.05% + 20 mV


• Current readback: ±0.1% + 20 mA (positive); ±0.2% + 50 mA (negative) Output Quality


• Ripple and noise (20 Hz to 20 MHz): 500 µV rms / 3 mV peak-to-peak in constant voltage mode; 1 mA rms in constant current mode


• Transient response: Less than 75 µs recovery to specified limits


• Remote sensing compensates for up to 10 V drop per load lead Protection and Control


• Programmable over-voltage and over-current protection


• Line and load regulation: Typically 0.01 mA

Key Features

• GPIB interface with SCPI command support for full remote control


• Voltage and current limit programming and readback over GPIB


• VXI Plug-and-Play drivers for simplified system integration


• Dual-range outputs increase test flexibility and measurement resolution


• Low-noise outputs minimize measurement uncertainty in sensitive circuits

Typical Applications

• Multi-channel automated test systems


• Device characterization under dual-supply conditions


• Series/parallel testing configurations requiring isolated outputs

Compatibility & Integration GPIB connectivity supports SH1, AH1, T6, L4, SR1, RL1, PP1, DC1, DT0, C0, and E1 protocols. Operating range: 0–55°C ambient, up to 2000 meters altitude, 95% relative humidity maximum.