Keysight (Agilent) N8940A Autoranging System DC Power Supply, 80 V, 170 A, 5000 W

The Keysight N8940A is a 5 kW autoranging DC power supply engineered for demanding ATE applications requiring flexible voltage and current combinations at full power output. Operating from 0 to 80 V and 0 to 170 A, this unit delivers 5000 W across a spectrum of load conditions that would require multiple fixed-output supplies in traditional rectangular architectures. The autoranging topology enables significantly higher current availability across more voltage points than conventional power supplies, making it ideal for test scenarios demanding dynamic load switching without power derating.

Designed for 400 VAC input operation, the N8940A occupies just 3U of rack space while achieving high power density. Output voltage ripple and noise measure 16 mVrms. Comprehensive protection includes over-voltage, over-current, and over-temperature safeguards.

For applications exceeding single-unit capacity, multiple N8940A supplies parallel via built-in parallel link, enabling unified control and over 100 kW total system output without individual unit programming.

Technical Specifications

• Output: 0–80 V, 0–170 A, 5000 W


• Input: 400 VAC


• Output Ripple/Noise: 16 mVrms


• Rack Space: 3U


• Protection: Over-voltage, over-current, over-temperature

Key Features

• Autoranging capability provides full power across multiple voltage/current combinations


• Built-in parallel link for multi-unit expansion to >100 kW output


• Compact 3U form factor with high power density


• LXI Core LAN, USB 2.0, GPIB, and analog interfaces


• Integrated web server for browser-based remote control

Typical Applications

• Automatic test equipment requiring variable load profiles


• High-current device testing and characterization


• Systems requiring dynamic switching between voltage and current operating points

Compatibility & Integration Multiple units integrate via built-in parallel link for seamless expansion. Remote access and control available through LAN (LXI Core), USB 2.0, GPIB, and analog control interfaces, with built-in web server support.