Keysight (Agilent) N8943A Autoranging System DC Power Supply, 500 V, 30 A, 5000 W

The Keysight N8943A is a 5000 W single-output programmable DC power supply engineered for automated test equipment and high-power applications requiring precision voltage and current control. Its autoranging topology delivers full power across a wide range of voltage and current combinations, eliminating the need for multiple fixed-output supplies. The unit occupies just 3U of rack space, achieving exceptional power density while supporting parallel operation up to 100 kW total output.

Technical Specifications

• DC Output: 0–500 V, 0–30 A, 5000 W maximum


• AC Input: 400 VAC (208 VAC configurations available)


• Autoranging Output: Dynamically adjusts voltage and current within nominal power envelope


• Programming Accuracy: Voltage ±0.1%, Current ±0.2%


• Built-in Measurements: Voltage and current


• Protection: Over-voltage (OVP), over-current (OCP), over-temperature (OTP)


• Power Factor: >0.99


• Physical: 3U rack mount (610 × 483 × 133 mm), 17 kg


• Display: Digital readout

Key Features

• Autoranging capability provides higher current availability at more voltage points than rectangular-output supplies


• Parallel master/slave architecture supports up to 4 units delivering 20 kW total, or larger configurations exceeding 100 kW


• Unified programming interface treats parallel units as a single supply, eliminating individual control requirements


• Built-in parallel link enables distributed power without external modules

Interfaces & Control

• LAN (LXI Core)


• USB


• GPIB


• Analog interfaces

Typical Applications High-power ATE systems, device characterization, burn-in testing, and applications requiring stable output across dynamic load conditions.