Keysight (Agilent) EL33133A DC Electronic Load, Single-Input: 150V, 40A, 250W

The Keysight EL33133A is a single-channel, 250 W DC electronic load for bench-top testing of power sources, batteries, solar panels, LED drivers, and power converters. Operating from 0 to 150 V at up to 40 A, it provides four programmable operating modes—constant current (CC), constant voltage (CV), constant resistance (CR), and constant power (CP)—enabling flexible load simulation across diverse test scenarios.

– Technical Specifications

• Input voltage range: 0 to 150 V DC
• Maximum input current: 40 A
• Maximum input power: 250 W
• Operating modes: CC, CV, CR, CP
• Programming accuracy (CC mode, medium range ≤4 A): ±(0.05% of output + 820 µA)
• Programming accuracy (CC mode, high range to 40 A): ±(0.05% of output + 7.2 mA)
• Readback accuracy matches programming accuracy for both ranges

– Key Features

Integrated measurement eliminates external instrumentation. The built-in voltmeter and ammeter simultaneously capture DUT voltage and current with high precision. Remote sense technology (2-wire and 4-wire) compensates for voltage drops across load leads, improving measurement accuracy at the device terminals.

Scope View captures transient behavior by digitizing voltage and current waveforms in real time, displaying them directly on the 4.3-inch color LCD without external probes or current shunts. The LIST function supports continuous, pulse, and toggle dynamic profiles with programmable slew rates.

Data logging records voltage, current, and energy with adjustable sample rates from 20 microseconds to 60 seconds, storing results in CSV format to internal non-volatile RAM or external USB memory.

– Typical Applications

• Power source and battery characterization
• Solar panel and photovoltaic testing
• LED driver validation
• DC-DC and AC-DC converter testing
• Transient load profile simulation
• Long-duration energy monitoring

– Compatibility & Integration

Standard interfaces include USB and LAN (LXI Core). Optional GPIB support enables integration into automated test systems. Remote programming and data retrieval via USB or Ethernet streamline production test environments and remote monitoring applications.