Agilent/Keysight 6291A DC Power Supply

The Keysight 6291A is a precision DC power supply delivering 0–40 V and 0–5 A across a 200 W output envelope. Designed for laboratory, production, and R&D environments, this half-rack instrument combines tight voltage and current regulation with low ripple performance and fast transient recovery. Auto-crossover operation transitions between constant voltage and constant current modes, while remote sensing and programmable control enable integration into automated test systems.

Technical Specifications

• Voltage: 0–40 V DC


• Current: 0–5 A DC


• Power: 200 W Line and Load Regulation


• CV mode: 0.01% + 1 mV


• CC mode: 0.05% + 1 mA Ripple and Noise (20 Hz–20 MHz)


• CV mode: 500 µV RMS, 25 mV peak-to-peak


• CC mode: 3 mA RMS Transient Performance


• Recovery time: <50 µs to within 15 mV following full-scale current step


• Output impedance: 0.001 Ω with 1 µH series inductance Power Input


• 115 V AC standard; 230 V AC (Option 18) available

Key Features

• Dual 10-turn controls for voltage and current adjustment


• Front and rear output terminals


• Floating output for positive or negative sourcing


• Remote sensing provision for load regulation


• Remote programming via external voltage or resistance


• Auto-series, auto-parallel, and auto-tracking capabilities


• Auto-crossover CV/CC operation


• Multiple range meters for output monitoring


• Zero overshoot on turn-on, turn-off, or power removal


• Convection cooling; light gray panel with dark gray case

Physical Specifications

• Dimensions: 210 mm W × 131 mm H × 435 mm D (8.25 in × 5.16 in × 17.13 in)


• Weight: 11.3 kg (25 lb)


• Form factor: 5.5-inch, half-rack width

Compatibility & Integration

• Rack mounting kits: 14513A, 14523A


• Crowbar overvoltage protection option available Product Status: Discontinued. This model is obsolete.