UNI-T UDP6730 360W 40V/30A Basic DC Switching Power Supply
Overview
The UDP6730 is a 360W single-channel programmable DC switching power supply delivering 0–40V at 0–30A in a compact desktop chassis. Fully digital control, RS-232 with SCPI command support, list and delayer programming, remote sense compensation, and OVP/OCP/OTP protection — the core feature set a service bench, maintenance shop, or production-test station needs from a programmable switching supply at this power class.
The UDP6700 series uses a wide-range output topology (3.0 power ratio) — voltage and current can combine flexibly within the rated 360W envelope, letting one supply replace several smaller fixed-range units. A 2.8-inch full-color LCD displays voltage, current, and power simultaneously; a numeric keypad with a rotary encoder lets you set values directly without scrolling. Standard alligator-clip test leads ship in the box.
Affordability meets precision: a programmable industrial DC supply, 1U-rack-mount form, 100-240 V universal input, RS-232 SCPI, and the UNI-T 3+2 warranty — at the price an industrial maintenance line actually buys at.
Key Features
- 360W Programmable Switching Output (0–40V, 0–30A) — Fully digital control with 10 mV / 1 mA setting resolution and CV/CC operation.
- Wide-Range Output (Power Ratio 3.0) — Voltage and current combine flexibly within the rated 360W envelope. One supply replaces several smaller fixed-range units.
- RS-232 with SCPI — Programmable over the rear-panel RS-232 interface with full SCPI command support. Free PC software included for setup, control, and data logging.
- List Mode & Delayer Function — Edit up to 48 voltage/current/time points for automated test profiles. Delayer function supports power-on/off sequencing for reliability test and automation workflows.
- 600 Memory Groups (3 × 200 in M1/M2/M3) — Three named memory banks of 200 presets each. Save complete output configurations for one-button recall — generous storage for benches that test many different DUTs.
- Remote Sense Compensation — S+/S− terminals connect directly to the load to compensate for voltage drop in long lead wires. The displayed voltage is the load voltage, not the terminal voltage.
- OVP / OCP / OTP Protection — Over-voltage and over-current thresholds set via long-press on the V/A keys. Over-temperature shutdown protects the supply at high ambient or extended full-load operation.
- 2.8-inch Full-Color LCD — Voltage, current, and power displayed simultaneously. Customizable display layout and brightness.
- Software Calibration + Intelligent Fan Control — Field-calibrate the supply via the included software. Fan speed scales with internal temperature for quieter operation at light loads.
30 Amps with Remote Sense — Bench Power for High-Current Work
360W single-channel programmable DC switching at 30A bench supply built for the workloads where the lower-current siblings in the family run short. 30A current capability suits motor drive characterization, battery testing, EV-electronics bench work, and any DC-DC converter test where 5A or 8A on the lower-current siblings runs short.
For high-current bench work specifically, two design points matter: remote sense and resolution. Remote sense (S+/S− terminals on the rear panel) compensates for the IR drop in heavy-gauge cables that 30A loads require — without it, the displayed voltage and the load voltage drift apart as current scales. The 10 mV / 1 mA resolution holds across the full 30A range; the supply is calibrated as a single instrument rather than chained sub-ranges, so behavior is consistent at 1A or 28A.
Applications
Motor Drive & EV-Electronics Bench
30A continuous output suits motor controller bench testing, BMS validation, EV charging-stage prototyping, and any DC-DC converter test where the load draws above 5–10A. SCPI over RS-232 scripts the test sequence; remote sense compensates for IR drop in the current-handling cables that high-current loads require.
Battery Charging & Testing
0–40V at up to 30A covers the charging current range for 12V, 24V, and 36V battery packs typical in e-bike, power-tool, light-EV, and small UPS applications. List mode programs multi-stage charge profiles; OVP/OCP protect the cells during development.
Industrial Maintenance & High-Current Service
Programmable bench supply at industrial-current levels for service work on lift trucks, automated guided vehicles, conveyor drive systems, and other high-current 24V/48V industrial equipment. RS-232 SCPI integrates into existing maintenance shop test fixtures.
Production Test
List mode runs voltage/current sequences without operator intervention. 600-group preset memory holds setups for diverse DUTs. Remote sense ensures repeatable voltage at the load regardless of high-current test-lead voltage drop.
Specifications
| Model | UDP6730 |
| Channels | 1 programmable |
| Output Voltage | 0–40V |
| Output Current | 0–30A |
| Output Power | 360W |
| Setting Resolution | Voltage: 10 mV Current: 1 mA |
| Readback Resolution | Voltage: 10 mV Current: 10 mA |
| Load Regulation | Voltage: ≤0.01% + 3 mV Current: ≤0.01% + 3 mA |
| Line Regulation | Voltage: ≤0.01% + 3 mV Current: ≤0.1% + 3 mA |
| Programming Accuracy | Voltage: ≤0.05% + 10 mV Current: ≤0.2% + 2 mA |
| Readback Accuracy | Voltage: ≤0.05% + 10 mV Current: ≤0.1% + 2 mA |
| Ripple & Noise | Voltage: 2.0 mVrms Current: 5.0 mArms |
| Temperature Coefficient | Voltage: ≤300 ppm/°C Current: ≤300 ppm/°C |
| Display | 2.8-inch full-color LCD, 4-digit V/I/P simultaneous |
| Programmable | Yes — SCPI over RS-232 |
| Interfaces | RS-232; Remote sense (S+/S−) |
| List/Delayer | 48 editable points each |
| Memory | 600 groups (3 × 200 in M1/M2/M3) |
| Protection | OVP, OCP, OTP, intelligent fan |
| AC Input | 110V (±10%) / 220V (±10%), 50/60 Hz |
| Operating Temperature | 0–40°C |
| Dimensions (W×H×D) | 87 × 174 × 255 mm |
| Weight | 2.5 kg |
| Certifications | CE |
| Warranty | 3 years standard + 2 years with free registration (5 years total) |
Frequently Asked Questions
Does the UDP6730 have USB?
No. The UDP6730's data interface is RS-232 only. SCPI command support is provided over the RS-232 port; free PC software is included that handles the host-side connection. If your workflow specifically needs USB or LAN, the UDP6900B series adds USB, RS-485, LAN with web control, plus all the UDP6700 features.
What's the difference between the UDP6730 and the UDP6731?
V/I balance. UDP6730: 40V/30A/360W (high-current, lower voltage — for motor drive, battery testing, low-voltage high-current loads). UDP6731: 80V/15A/360W (higher voltage, lower current — for 48V/60V/80V automotive, telecom DC, higher-voltage power-electronics). Same 360W envelope, different positioning in the V/I plane.
What is "wide-range output" / "power ratio 3.0"?
The supply's voltage and current can combine flexibly within the rated 360W envelope. The 3.0 ratio means the maximum voltage × maximum current is 3× the rated power, giving you flexibility to handle many DUTs from a single supply instead of needing several with fixed V/I ranges.
What's the difference between the UDP6700 and UDP6900B series?
The UDP6900B series is the next tier up. It adds auto-range output, slope control (controlled rise/fall), built-in DVM (digital voltmeter for a second measurement point), web remote control over LAN, RS-485 for multi-machine networking, USB Device, Modbus RTU support, and external analog control. The UDP6700 series provides the core CV/CC + list-mode + remote-compensation feature set with RS-232 SCPI at a lower price.
What's included with the UDP6730?
The UDP6730 ships with the instrument, power cord conforming to the destination country, alligator-clip test leads, and UNI-T's 3+2 warranty (3 years standard plus 2 additional years with free registration — 5 years total). Ships from authorized US dealer.
Warranty
This instrument is backed by UNI-T's 3+2 Year Warranty — 3 years of standard coverage, plus 2 additional years free when you register your product. That's 5 years of total protection at no extra cost.
The warranty covers manufacturing defects and component failures under normal use conditions. UNI-T instruments are built for professional daily use, and our warranty reflects that commitment to long-term reliability.
Data Sheets and Manuals
Software / Firmware Downloads
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