The Keysight 6621A is an 80 W dual-output DC power supply engineered for automated test applications requiring independent, isolated voltage and current sources. Each output operates across dual ranges—0 to 7 V at 0 to 10 A, or 0 to 20 V at 0 to 4 A—with programming accuracy of 0.06% + 19 mV (voltage) and 0.16% + 100 mA (current). The unit delivers low-noise performance with 500 µV RMS and 3 mV peak-to-peak ripple across the 20 Hz to 20 MHz band, plus fast load recovery (< 75 µs to 75 mV nominal). Programmable over-voltage and over-current protection with fast CV/CC crossover safeguard the device under test. A GPIB (IEEE 488) interface with 7 ms typical command processing enables seamless integration into automated test systems. The 3U rack-mountable form factor (425.5 mm W × 132.6 mm H × 497.8 mm D) accommodates manufacturing, research, and development environments. Load regulation of 0.5 mV voltage and 0.25 mV cross-regulation ensure stable operation across load changes. Optional relay control, DFI/RI, and remote inhibit functionality are available. Input voltage options span 104–127 VAC, 191–233 VAC, or 209–250 VAC (47–66 Hz, 550 W max.). UL 1244 listed, CSA 556B certified, IEC 348 compliant, and CE marked with CISPR-11 Group 1 Class B RFI suppression.
Technical Specifications
• Output Configuration: 2 independent, isolated outputs; 80 W total
• Low Range: 0 to 7 V, 0 to 10 A
• High Range: 0 to 20 V, 0 to 4 A
• Voltage Accuracy: 0.06% + 19 mV @ 25 °C ±5 °C
• Current Accuracy: 0.16% + 100 mA @ 25 °C ±5 °C
• Voltage Ripple & Noise (20 Hz–20 MHz): 500 µV RMS; 3 mV peak-to-peak
• Current Ripple & Noise: 1 mA RMS
• Voltage Load Regulation: 0.5 mV
• Voltage Cross-Regulation: 0.25 mV
• Load Recovery Time: < 75 µs to 75 mV nominal
• Form Factor: 3U rack-mountable; 425.5 mm W × 132.6 mm H × 497.8 mm D
• Weight: 17.4 kg net; 22.7 kg shipping
– Key Features
• Programmable over-voltage protection (OVP) and over-current protection (OCP)
• Fast CV/CC mode crossover for dynamic load switching
• GPIB (IEEE 488) control with SH1, AH1, T6, L4, SR1, RL1, PP1, DC1, DT0, C0, E1 capabilities
• Command processing at 7 ms typical (display disabled)
• Optional relay control and DFI/RI (Option 750)
• Optional remote inhibit, non-latching (Option S50)
• Input options: 104–127 VAC, 191–233 VAC, or 209–250 VAC (47–66 Hz)
• UL 1244, CSA 556B, IEC 348, CE marked; CISPR-11 Group 1 Class B
– Typical Applications
• Multi-rail device characterization and validation
• Component and circuit board manufacturing test
• Burn-in and reliability screening
• Research and bench measurement
– Compatibility & Integration
GPIB interface enables direct integration with ATE systems and test controllers. Optional relay and remote inhibit modules extend capability for complex test sequences and safety interlocking.
