# HP E3644A 80W Dual-Range (8V/8A or 20V/4A) Single-Output DC Power Supply (Pre-Owned) # HP E3644A 80W Dual-Range (8V/8A or 20V/4A) Single-Output DC Power Supply (Pre-Owned) ## Key Features At A Glance - Single-output, dual-range linear DC supplies offered in 30 W, 50 W, and 80 W models across the series - GPIB and RS-232 standard on every model; SCPI-compatible for programmable automated test systems - Dependable 0.01% load and line regulation with fast settling time under 90 ms - Overvoltage protection and rear-output remote sense provided as standard - Front and rear output terminals plus front-panel binding posts for safety leads, banana plugs, or stripped wires - Vacuum fluorescent display with adjustment knob; store and recall up to 5 operating states - Plug&Play drivers available for National Instruments LabVIEW and HP VEE The HP E3640A Series is a line of single-output, dual-range programmable DC power supplies built around 30 W, 50 W, and 80 W models. These general-purpose programmable supplies are designed to deliver the performance of system power supplies at an affordable price, pairing each output with a dual-range architecture so a single instrument can trade higher voltage for higher current depending on the task at hand. A programmable DC power supply provides controlled, regulated power to a device under test, letting an engineer set precise voltage and current limits and adjust them by command or by hand. The E3640A Series supports both modes: programming voltage and current over the remote interface, and setting levels directly from the front panel for bench work where the device under test sits in front of the operator. ValueTronics stocks and holds its own test and measurement inventory in a 20,000 sq ft secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Every used unit we offer is inspected and functionally verified in-house by qualified technicians before it ships, while new units ship factory-sealed exactly as received from the manufacturer. That combination lets engineers source the right instrument, in the condition they need, from a company that physically holds the equipment it sells. ## Brand Heritage Hewlett-Packard's test and measurement business was spun out as Agilent Technologies in 1999, and that measurement business was subsequently transferred to Keysight Technologies in 2014. Instruments originally branded Hewlett-Packard are therefore part of the same product lineage now carried under the Keysight name. ## Compare Other Models in This Series This series of single-output dual-range power supplies consists of 30 W, 50 W, and 80 W models that share a common feature set: dual-range output, 0.01% load and line regulation, standard GPIB and RS-232 with SCPI programming, front and rear output terminals, overvoltage protection, and rear-output remote sense. Every model in the family pairs a vacuum fluorescent display and adjustment knob with the same remote-control architecture, so the difference between models is the available output range rather than the way the supply is operated or programmed. Each pre-owned model linked below is its own dedicated product page with condition-matched pricing. Select the model whose output ranges fit your application, then choose the listing that matches the condition and price you need. The models differ primarily in maximum power and in their dual-range voltage/current combinations. The E3640A is a 30 W supply offering 8 V/3 A or 20 V/1.5 A, while the E3641A is also rated 30 W but reaches higher voltage at 35 V/0.8 A or 60 V/0.5 A. The E3642A is a 50 W supply providing 8 V/5 A or 20 V/2.5 A, and the E3644A is an 80 W supply providing 8 V/8 A or 20 V/4 A. Use the comparison table that follows to match each model's dual output ranges to your required voltage and current. Because each model carries its own range pairings, select on the basis of the specific voltage/current combination your device under test requires rather than power rating alone. Model Output Range 1 Output Range 2 Max Power **E3644A** 8 V / 8 A 20 V / 4 A 80 W E3640A 8 V / 3 A 20 V / 1.5 A 30 W E3641A 35 V / 0.8 A 60 V / 0.5 A 30 W E3642A 8 V / 5 A 20 V / 2.5 A 50 W Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below. ## Accessories Supplied - Operating and service manual - Quick reference guide - AC power cord ## Product Core & Specifications Specification Value DC Outputs Number of Outputs 1 Voltage/Current 8 V/8 A or 20 V/4 A Power (max) 80 W Load and Line Regulation Voltage <0.01% + 3 mV Current <0.01% + 250 uA Ripple and Noise (20 Hz to 20 MHz) Normal-Mode Voltage < 500 uVrms / 5 mVp-p Normal-Mode Current < 4.0 mArms Common-Mode Current < 1.5 uArms Programming Accuracy Voltage 0.05% + 10 mV Current 0.2% + 10 mA Readback Accuracy Voltage 0.05% + 5 mV Current 0.15% + 5 mA Resolution Program Resolution (Voltage/Current) 5 mV/1 mA Readback Resolution (Voltage/Current) 2 mV/1 mA Meter Resolution (Voltage/Current) 10 mV/1 mA General Transient Response Time <50 us for output to recover within 15 mV following a change in output current from full load to half load or vice versa Operating Temperature 0 °C to 55 °C Warranty Three years Size (W x H x D) 254 mm x 104 mm x 374 mm (10 in x 4.1 in x 14.8 in) Weight 6 kg (13.21 lbs) ## About this Pre-Owned unit This pre-owned unit is inspected and functionally verified in-house before it ships and is backed by our pre-owned warranty. To confirm its exact condition, firmware revision, installed options, or included accessories for your application before ordering, contact our Test Architects. - Warranty included - Functional verification included - Standard Calibration Upgrade Options: No Calibration Required, NIST Traceable, Z540.1 or ISO 17025 with Data, Z540.3 Guardbanding with Data. - Note that unnecessary accessories may not be included (contact Test Architect to confirm). ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application. **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:** 895.0 USD - 1070.0 USD - **Vendor:** HP - **Type:** Dc Supply - **Tags:** Agilent, Agilent Keysight, Agilent Technologies, DC Power Supply, Dc Supply, E3644, E3644A, HP, Inc., Keysight, Keysight Technologies, Manufacturers, Model 3644, Power Supplies & Loads, Pre-Owned, product_manual_group_1, Product_used ## Variants | Variant | Price | Available | |---------|-------|-----------| | None | 895.00 USD | In stock | | NIST Traceable | 1000.00 USD | In stock | | NIST Traceable with Full Data | 1021.00 USD | In stock | | ISO IEC 17025 Accredited | 1070.00 USD | In stock | ## Images - HP E3644A 80W Dual-Range (8V/8A or 20V/4A) Single-Output DC Power Supply (Pre-Owned) --- > Source: [ValueTronics](https://valuetronics.com/products/e3644a-agilent-dc-power-supply-used) > Updated: 2026-06-03