Keysight (Agilent) N7951A Advanced Power System – Dynamic DC Power Supply, 20 V, 50 A, 1000 W

The Keysight N7951A Advanced Power System is a dynamic DC power supply engineered for automated test equipment (ATE) applications demanding high-speed dynamic sourcing and precision measurement. Delivering 1000 W across 20 V and 50 A outputs, this 1U unit accelerates test throughput to speeds 100 times faster than standard system power supplies, with command processing under 2 ms and programming speeds as low as 500 µs.

Technical Specifications

• Output voltage: 20 V


• Output current: 50 A


• Power rating: 1000 W (1 kW)


• Input voltage: 240 VAC


• Single output configuration


• Rack space: 1U Performance Metrics


• Command processing speed: < 2 ms


• Programming speed (up/down): up to 500 µs


• Test speed improvement: up to 100x faster than standard supplies


• Adjustable measurement rate to balance speed and accuracy

Key Features Measurement and Monitoring Dual voltage and current measurement with DMM-like accuracy. Additional measurements include power, peak power, watt hour, and amp hour. Two-Quadrant Operation Enables smooth transitions between positive and negative current. Standalone operation supports 10% rated current two-quadrant capability; full two-quadrant operation requires the N7909A power dissipater unit. Programmable current limits and waveforms support both sourcing and loading for power storage test applications. Scalability Built-in APS paralleling allows configuration up to 10 kW of total power with equal current sharing via three-wire connection, maintaining CV or CC operating modes across paralleled units. Arbitrary Waveform Generation Capable of generating voltage and current transients, including 10 ms interrupt pulses with fall times under 200 µs.

Interfaces and Software Connectivity GPIB, USB, and LAN communication interfaces. Software and Accessories Free APS Power Assistance Software provides advanced display, setup, and measurement functions. Optional N7908A Black-Box Recorder captures measurement data, trigger events, and status bits in real time. BenchVue Software enabled for PC-based control.

Typical Applications Power device characterization, battery and energy storage testing, transient load simulation, and multi-channel parallel power delivery in high-throughput test environments.