# Keysight EL33133A 150V 40A 250W Single-Input DC Electronic Load # Keysight EL33133A 150V 40A 250W Single-Input DC Electronic Load ## Key Features At A Glance - Maximum input voltage of 150 V DC across all models — designed for consumer power supply, battery, solar panel, and LED driver verification (See higher-power EA or Chroma loads for industrial-scale applications) - Input power range from 250 W (EL33133A) to 600 W total (EL34243A dual-input) covering single and dual-channel bench requirements - Four operating modes: constant current (CC), constant voltage (CV), constant resistance (CR), and constant power (CP) - Built-in scope view digitizes voltage and current up to 256k samples at 200 kHz — eliminates need for external current shunts or probes - Integrated data logger captures voltage, current, and energy with sample intervals from 20 µs to 60 s for up to 10,000 hours or 5 MB - LAN (LXI-Core), USB 2.0, and optional GPIB interfaces standard — SCPI-1999 and IEEE 488.2 compliant for ATE integration - Built-in 2-wire and 4-wire remote sense technology eliminates voltage drops caused by load lead cables (up to 5 V drop per lead) - 4.3-inch color LCD display with meter view, scope view, and data logger view for at-a-glance measurement visibility The Keysight EL30000 Series Bench DC Electronic Loads are programmable DC loads designed for design verification of consumer power supplies, batteries, battery modules, solar panels, LED drivers, and power converters. The series includes three models: the EL33133A single-input load rated at 150 V, 40 A, 250 W; the EL34143A single-input load rated at 150 V, 60 A, 350 W; and the EL34243A dual-input load rated at 150 V, 60 A per channel with 300 W per input and 600 W total. Each model provides fully integrated voltmeter and ammeter capability to simultaneously measure voltage and current for the device under test, eliminating the need for external shunt resistors and cables. An electronic load absorbs power from a device under test, simulating real-world load conditions while precisely controlling and measuring the energy drawn. The EL30000 Series is positioned for design verification work where a engineer needs to characterize how a power source responds under controlled load — testing battery discharge profiles, validating power supply regulation, characterizing solar panel I-V curves, and verifying LED driver behavior. The datasheet also identifies wide-bandgap semiconductor component characterization, including MOSFET and IGBT devices, as a target application for these instruments. ## Brand Heritage Keysight Technologies traces its test and measurement heritage to Hewlett-Packard, which built its T&M business beginning in 1939. HP separated its test and measurement, semiconductor products, and chemical analysis businesses as Agilent Technologies in 1999. In 2014, Agilent further separated its electronic measurement business as Keysight Technologies, while Agilent retained the life sciences and chemical analysis instruments. Today's Keysight is the direct corporate continuation of HP's electronic measurement engineering lineage. ## Compare Other Models in This Series The EL30000 Series comprises three bench DC electronic loads sharing a common 150 V input voltage rating, common 4.3-inch color display, common four-mode operation (CC/CV/CR/CP), and common feature set including scope view, data logger, sequencer, and remote interfaces. The three models differ in input current capability, power capability, and channel count — allowing a Test Architect to match the load to the device-under-test power profile without changing instrument architecture between projects. All three models share identical CC/CV/CR/CP programming and readback accuracy at their respective ranges, identical 200 kHz scope digitization, identical 20 µs to 60 s data logging granularity, and identical LAN/USB/optional-GPIB connectivity. The choice between models is driven primarily by current capability, total power, and whether single-DUT or dual-DUT operation is required. Each new EL30000 Series model below is listed on its own dedicated product page with condition-matched pricing and current availability. Click through to the specific model page to confirm current inventory, condition grade, and pricing for your project. The EL33133A is the entry point to the series at 250 W and 40 A — appropriate for lower-current DUTs where the 40 A ceiling provides adequate margin. Worth noting from the datasheet: the EL33133A is available only through Keysight's Buy Online store in the US and Canada per the ordering information section. The EL34143A increases capability to 60 A and 350 W in the same single-input form factor, and the EL34243A delivers two independently-isolated 60 A / 300 W inputs (600 W total) with the option to parallel both inputs for 120 A / 600 W single-DUT delivery. The comparison table below summarizes the input ratings, power capability, and channel count across the family — the per-model specification tables on each product page provide the full programming accuracy, readback accuracy, slew rate, and protection detail. Model Channels Max Input Voltage Max Input Current **EL33133A** 1 150 V 40 A EL34143A 1 150 V 60 A EL34243A 2 150 V 60 A per channel (120 A parallel) Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below. ## Accessories Supplied - AC power cord - 10A, 3.5mm female 4-pin terminal I/O block connector (qty 1) - 8A, 3.5mm 2-pin terminal sense block connector (qty 1) - 85A, 12mm 2-pin input connector (qty 1) ## Product Core & Specifications Specification EL33133A Channels 1 Maximum Input Power 250 W Input Voltage Rating (0 to 40°C) 0 to 150 V Input Current Rating (0 to 40°C) 0 to 40 A Parallel Mode Current NA CC Programming Accuracy, Low (4 A range) 0.05% + 820 µA CC Programming Accuracy, High (40 A range) 0.05% + 7.2 mA CV Programming Accuracy, Low (15 V) 0.03% + 4.2 mV CV Programming Accuracy, High (150 V) 0.03% + 15 mV CR Programming Accuracy, Low (0.08 Ω to 30 Ω) 0.1% + 160 mS CR Programming Accuracy, Medium (10 Ω to 1.25 kΩ) 0.1% + 16 mS CR Programming Accuracy, High (100 Ω to 4 kΩ) 0.1% + 1.8 mS CP Programming Accuracy, Low 0.08% + 18 mW CP Programming Accuracy, Medium 0.08% + 150 mW CP Programming Accuracy, High 0.08% + 1.5 W Current Readback Accuracy, Low 0.05% + 820 µA Current Readback Accuracy, High 0.05% + 7.2 mA Voltage Readback Accuracy, Low (15 V) 0.03% + 4.2 mV Voltage Readback Accuracy, High (150 V) 0.03% + 15 mV Power Readback Accuracy, Low 0.08% + 18 mW Power Readback Accuracy, Medium 0.08% + 150 mW Power Readback Accuracy, High 0.08% + 1.2 W Typical Minimum Operating Voltage, Low Current Range 0.15 V Typical Minimum Operating Voltage, High Current Range 1.5 V CC Slew Rate, Low 200 kA/s CC Slew Rate, High 3.7 MA/s CV Slew Rate, Low (15 V) 79 kV/s CV Slew Rate, High (150 V) 310 kV/s Maximum Programmable Power, Low 5.1 W Maximum Programmable Power, Medium 25.5 W Maximum Programmable Power, High 255 W Programmable Short 37.5 mΩ (4 A / 40 A) Input Off Impedance 824 kΩ Current Ripple (rms) 3 mA Voltage Ripple (rms) 5 mV Measurement Small Signal Bandwidth (-3 dB typical) 30 kHz Measurement Small Signal Bandwidth (-1 dB typical) 17.5 kHz Command Processing Time < 10 ms Fixed OCP, Low 4.35 A ± 25 mA Fixed OCP, High 42 A ± 250 mA OVP, Low (15 V) 16.5 V ± 85 mV OVP, High (150 V) 165 V ± 600 mV OPP, Low 5.5 W OPP, Medium 27.5 W OPP, High 275 W Weight 6.50 kg Overall Dimension (H x W x D) 144.85 x 215.90 x 457.60 mm Net Dimension without feet, strap handle and GPIB module (H x W x D) 132.51 x 212.80 x 457.60 mm **Important:** The EL34243A dual inputs must not be connected in series. Input-parallel mode is only supported in constant current (CC), constant resistance (CR), and constant power (CP) modes — parallel operation is not supported in constant voltage (CV) mode.**Important:** Do not connect the dual inputs on EL34243A in series; parallel mode is only allowed for CC, CR and CP operating modes.**Important:** The EL33133A is only available through Keysight's Buy Online store in the US and Canada.**Important:** The EL34GPBU GPIB user-installable interface module is compatible with the EL34143A and EL34243A only (not the EL33133A).**Important:** Remote sense: inputs can maintain specifications with up to a 5-volt drop per load lead; the load lead drop reduces the maximum available voltage at the load. **Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.** ## Details - **Price:** 2762.0 USD - **Vendor:** Keysight - **Type:** Dc Electronic Load - **Tags:** DC Electronic Load, Keysight, Keysight Technologies, Manufacturers, Power Supplies & Loads, product_manual_group_3, Product_new ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 2762.00 USD | In stock | ## Images - EL33133A Keysight Technologies DC Electronic Load --- > Source: [ValueTronics](https://valuetronics.com/products/el33133a-keysight-dc-electronic-load-new) > Updated: 2026-05-30