Agilent/Keysight 6443B DC Power Supply

The Agilent/Keysight 6443B is a solid-state regulated DC power supply engineered for benchtop and rack-mount deployment. It delivers continuously variable output from 0 to 120 VDC at 0 to 2.5 A, with automatic crossover between constant voltage and constant current operating modes. The unit combines low output noise, excellent regulation, and fast transient response, making it suitable for precision electronics testing, component characterization, and manufacturing environments where stable power and repeatable results are critical.

Technical Specifications

• Output: 0–120 VDC, 0–2.5 A (300 W maximum)


• Input: 105–125 VAC


• Efficiency: Up to 75% at full output


• Constant Voltage Regulation: Load effect <120 mV (0–2.5 A), line effect <60 mV (105–125 VAC), temperature effect 0.05% + 30 mV/°C, 8-hour drift 0.15% + 90 mV


• Constant Current Regulation: Load effect <25 mA, line effect <25 mA, temperature effect 8 mA/°C, 8-hour drift 25 mA


• Transient Response: Recovery within 600 mV in <300 ms following half-rated current step; amplitude <4.0 V/A for 20–100% load changes


• Metering: Front-panel voltmeter (0–120 V) and ammeter (0–3 A), both 2% accurate at full scale

Key Features

• User-adjustable constant voltage/constant current crossover


• Automatic overload protection with mode switching


• Reverse voltage protection via output diode shunts


• Remote sensing and remote programming (voltage or resistance control)


• Three programmable memory states with keypad lock


• AC input fuse and double-pole power switch


• Passive convection cooling (fanless operation)


• GPIB interface support

Typical Applications

• Research and laboratory power sourcing


• Manufacturing test benches and component validation


• Service and repair environments requiring precise voltage/current control


• Automated test equipment integration via remote programming

Compatibility & Integration Remote sensing and voltage/resistance-based remote programming enable integration into automated systems. GPIB connectivity supports instrument control in larger test configurations. Compact 19" rack-mount form factor (3.5" H × 19" W × 17.5" D, 31 lb) suits standard bench and equipment racks.