Agilent / Keysight N3305A 500 Watt Electronic Load Module

The Keysight N3305A is a 500 W electronic load module engineered for integration into N3300A or N3301A mainframes. It delivers precision load simulation across constant current, constant voltage, and constant resistance operating modes, making it ideal for characterizing power supplies, DC-to-DC converters, and battery systems. The module combines programmable load control with simultaneous voltage and current measurement via a 16-bit digitizer, enabling transient capture and dynamic response analysis across a 4096-point waveform buffer.

– Technical Specifications

Input Ratings
• Maximum voltage: 150 V
• Maximum current: 60 A
• Power dissipation: 500 W

Operating Modes
• Constant Current (CC): 6 A to 60 A with 10 mA regulation; accuracy 0.1% + 7.5 mA (low) or 0.1% + 15 mA (high)
• Constant Voltage (CV): 15 V to 150 V with 10 mV regulation; accuracy 0.1% + 10 mV (low) or 0.1% + 20 mV (high)
• Constant Resistance (CR): Four ranges from 0.033 Ω to 2500 Ω dependent on minimum load current percentage

Measurement System
• 16-bit resolution for simultaneous voltage, current, and power readback
• Waveform digitization with 4096 data points per channel

– Key Features

• Modular two-slot design fits N3300A (6-slot) and N3301A (2-slot) mainframes
• GPIB programmable control and data acquisition
• Integrated load regulation across three independent modes
• Transient waveform capture for dynamic characterization
• Indoor operation rated for installation category II, pollution degree 2 environments
• Operating limits: 95% relative humidity, 2000 m maximum altitude

– Typical Applications

• DC power supply verification and performance acceptance testing
• DC-to-DC converter efficiency and load regulation measurement
• Battery pack discharge and performance profiling
• Automated test system configuration for production environments

– Compatibility & Integration

The N3305A connects to Keysight N3300A and N3301A electronic load mainframes via a 14-pin control connector. Each module occupies two mainframe slots and requires a single GPIB address for system control.