# Rohde & Schwarz HMP4040 Programmable 4 Channel High-Performance Power Supply (Pre-Owned) # HAMEG HMP4040 Programmable 4 Channel High-Performance Power Supply (Pre-Owned) ## Key Features At A Glance - Three or four galvanically isolated, earth-free, short-circuit-protected output channels (HMP4030: 3 x 0–32V/0–10A; HMP4040: 4 x 0–32V/0–10A) - 384W total output power with intelligent power management across channels - Low residual ripple of <150 µVrms (3 Hz–100 kHz) achieved through linear post regulators - High setting and read-back resolution of 1 mV for voltage and down to 0.2 mA for current - Adjustable overvoltage and overcurrent protection (OVP/OCP) on each channel, with electronic fuses combinable via FuseLink - Advanced parallel and serial operation via V/I tracking, plus EasyArb function for freely definable V/I characteristics (128 points, 10 ms–60 s dwell) - 240 x 128 pixel full-graphical LCD display with illuminated buttons and direct keypad parameter entry - Front 4 mm safety sockets and rear screw-type terminals (including SENSE) for bench or rack integration - USB/RS-232 dual-interface standard; optional Ethernet/USB dual-interface (HO730) or IEEE-488 GPIB (HO740) The HAMEG HMP4040 is a programmable four-channel high-performance DC power supply delivering up to 384 watts of total output across four galvanically isolated, earth-free, short-circuit-protected channels. Each channel provides 0–32 V and 0–10 A (with up to 5 A available at 32 V, limited to 160 W per channel), with an intelligent power management system that distributes the 384 W envelope across active outputs. The companion HMP4030 model offers the same per-channel capability across three channels rather than four. The HMP4040 is built for laboratory and development environments that need multiple independently controllable DC rails on a single bench. Typical applications include powering multi-rail prototype circuits, providing isolated supplies for analog and digital sections of a design simultaneously, and serving as a programmable source in automated test setups. The EasyArb function — which lets the user define a sequence of up to 128 voltage/current/time points with dwell times from 10 ms to 60 s, repeated continuously or in burst mode — extends the supply beyond static DC operation into freely definable V/I profiles, making it useful for simulating battery discharge curves, supply-line transients, and other time-varying source behavior. ValueTronics stocks, tests, and ships the HMP4040 from our 20,000 square-foot secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Equipment we sell is verified by our in-house technicians before it leaves the building rather than drop-shipped from a third party, which is how we can stand behind the condition and performance of every unit we list. ## Brand Heritage HAMEG Instruments GmbH is a German test and measurement manufacturer founded in 1957 and headquartered in Mainhausen, Germany. HAMEG was acquired by Rohde & Schwarz in 2005 and operated as a wholly owned subsidiary; the HMP-series power supplies were subsequently rebranded into the Rohde & Schwarz portfolio, and current-production equivalents are marketed under the Rohde & Schwarz HMP name. Units carrying the HAMEG label predate or coincide with this transition. ## Compare Other Models in This Series The HMP-series from HAMEG comprises two closely related programmable bench supplies that share the same core architecture: 0–32 V and 0–10 A per channel, 384 W total output managed by intelligent power management, linear post-regulator design with <150 µVrms residual ripple, and identical interface, display, EasyArb, FuseLink, and protection feature sets. The two models in this family differ only in channel count. The HMP4030 provides three independent output channels; the HMP4040 provides four. All other specifications — per-channel voltage and current range, total output power envelope, ripple, regulation, resolution, EasyArb behavior, FuseLink, OVP/OCP, display, memory, and interface options — are identical between the two. Each pre-owned model below is listed on its own dedicated product page with condition-matched pricing. Selecting the right channel count for the application is the primary decision; the per-channel specifications are the same across the family. Within the family, the HMP4040 is the four-channel variant, suited to applications that need a fourth independent rail on a single chassis — for example, when an additional housekeeping rail or a fourth tracking channel is required without occupying a second instrument's worth of bench space. The practical choice between the HMP4030 and the HMP4040 is driven by the number of independent DC rails the application needs simultaneously. A three-rail design — typically a positive analog rail, a negative analog rail, and a digital rail — is fully served by the HMP4030. A design that adds a fourth rail, such as a separate bias supply, a second digital domain, or an isolated reference, fits the HMP4040. Because the 384 W total output is shared across active channels in both models via the intelligent power management system, the HMP4040's fourth channel does not increase total available power; it adds flexibility in how that 384 W envelope can be partitioned. Per-channel limits (160 W maximum, 10 A maximum, 5 A at the full 32 V) remain identical. The comparison table below summarizes the specific differences across the family. Model Output Channels Output Voltage Output Current **HMP4040** 4 0 to 32 V 0 to 10 A HMP4030 3 0 to 32 V 0 to 10 A Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below. ## Accessories Supplied - Line cord - Operating manual - CD - Software ## Product Core & Specifications Outputs HMP4030 3 x 0…32 V / 0…10 A HMP4040 4 x 0…32 V / 0…10 A Output terminals 4 mm safety sockets frontside, Screw-type terminal rear side (4 units per channel) Output power 384 W max. Compensation of lead resistances (SENSE) 1 V Overvoltage/overcurrent protection (OVP/OCP) Adjustable for each channel Electronic fuse Adjustable for each channel, may be combined using FuseLink Response time <10 ms 32 V Channels Output values, HMP4030 3 x 0…32 V / 0…10 A, (5 A at 32 V, 160 W max.) Output values, HMP4040 4 x 0…32 V / 0…10 A, (5 A at 32 V, 160 W max.) Resolution, Voltage 1 mV Resolution, Current <1 A: 0.2 mA; ≥1 A: 1 mA Setting accuracy, Voltage <0.05 % + 5 mV (typ. ±2 mV) Setting accuracy, Current <0.1 % + 5 mA (typ. ±1 mA at I <500 mA) Measurement accuracy, Voltage <0.05 % + 2 mV Measurement accuracy, Current <500 mA <0.05 % + 0.5 mA, typ. ±0.5 mA Measurement accuracy, Current ≥500 mA <0.05 % + 2 mA, typ. ±2 mA Residual ripple, Voltage (3 Hz…100 kHz) <150 µVrms Residual ripple, Voltage (3 Hz…20 MHz) 1.5 mVrms typ. Residual ripple, Current <1 mArms Residual deviation after load change (10…90 %), Voltage <0.01 % + 2 mV Residual deviation after load change (10…90 %), Current <0.01 % + 250 µA Residual deviation after line voltage change (±10 %), Voltage <0.01 % + 2 mV Residual deviation after line voltage change (±10 %), Current <0.01 % + 250 µA Recovery time after load step from 10…90 % for return within ±10 mV window <100 µs Arbitrary Function EasyArb Parameters of points Voltage, current, time Number of points 128 Dwell time 10 ms…60 s Repetition rate Continuous or burst mode with 1…255 repetitions Trigger Manually via keyboard or via Interface Maximum Ratings Reverse voltage 33 V max. Reverse polarized voltage 0.4 V max. Max. permitted current in case of reverse voltage 5 A max. Voltage to earth 150 V max. Miscellaneous Temperature coefficient/°C, Voltage 0.01 % + 2 mV Temperature coefficient/°C, Current 0.02 % + 3 mA Display 240 x 128 Pixel LCD (full graphical) Memory Non volatile memory for 3 Arbitrary functions and 10 device settings Interface Dual-Interface USB/RS-232 (HO720) Processing time <50 ms Protection class Safety class I (EN61010-1) Power supply 115/230 V ±10 %; 50…60 Hz, CAT II Mains fuses 115 V: 2 x 10 A slow blow 5 x 20 mm; 230 V: 2 x 5 A slow blow 5 x 20 mm Power consumption 550 VA max. Operating temperature +5…+40 °C Storage temperature \-20…+70 °C Rel. humidity 5…80 % (non condensing) Dimensions (W x H x D) 285 x 125 x 365 mm Weight approx. 10 kg **Important:** Maximum reverse voltage: 33 V; maximum reverse polarized voltage: 0.4 V; maximum permitted current in case of reverse voltage: 5 A. Maximum voltage to earth: 150 V.**Important:** All data valid at 23 °C after 30 minutes warm-up. ## About this used unit - 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). **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:** 995.0 USD - 1645.0 USD - **Vendor:** Rohde & Schwarz - **Type:** Dc Supply - **Tags:** DC Power Supply, Image_needed, Manufacturers, Power Supplies & Loads, product_manual_group_2, Product_used, Rohde & Schwarz ## Variants | Variant | Price | Available | |---------|-------|-----------| | HO720 / None | 995.00 USD | In stock | | HO720 / NIST Traceable | 1260.00 USD | In stock | | HO720 / NIST Traceable with Full Data | 1345.00 USD | In stock | | HO720 / ISO IEC 17025 Accredited | 1490.00 USD | In stock | | HO732 / None | 1150.00 USD | In stock | | HO732 / NIST Traceable | 1415.00 USD | In stock | | HO732 / NIST Traceable with Full Data | 1500.00 USD | In stock | | HO732 / ISO IEC 17025 Accredited | 1645.00 USD | In stock | ## Images - Rohde & Schwarz HMP4040 Programmable 4 Channel High-Performance Power Supply (Pre-Owned) --- > Source: [ValueTronics](https://valuetronics.com/products/hmp4040-rohde-schwarz-dc-power-supply-used) > Updated: 2026-08-21