The UNI-T UDP5250-6 is a single-channel 400W programmable DC switching power supply delivering 0–250V and 0–6A with auto-ranging across the rated power envelope. It pairs a wide output range with the regulation accuracy, source-emulation and remote control expected of a professional programmable supply.
Voltage accuracy is ±(0.05% of set + 0.05% of rated) and current accuracy ±(0.5% of set + 0.1% of rated); ripple is held to 100mV p-p with a 100 ppm/°C temperature coefficient. A 2.4-inch TFT-LCD shows voltage, current and power together, and full SCPI control over USB and LAN drops the UDP5250-6 straight into LabVIEW, Python-VISA or any ATE framework.
A 400W programmable DC switching power supply delivering 0–250V / 0–6A, bringing grid-referenced DC test voltages to the bench for AC/DC converter development, inverter front-end characterization, and high-voltage capacitor testing.
 
Choosing Your Model — UDP5000 Series
The UDP5000 name spans 20 models built on one platform: five voltage classes (40 V / 80 V / 160 V / 250 V / 800 V) across four power classes (400 W / 800 W / 1200 W / 2000 W). They differ only in output range and chassis size — control, accuracy, protection and interface are otherwise identical. Compare the full series before selecting:
Every model shares the same chassis architecture, control system, regulation accuracy, protection suite, and interface set. The 800 V UDP5800 tier does not support series connection; all other tiers support series and parallel combining. Choose by the voltage class that covers your rail and the power class that covers your load — output range and chassis height scale with power, the instrument does not change.
 
Details
CC/CV Priority — Protect the Device, Not Just the Supply
Most bench supplies treat the CC/CV crossover as a fixed hardware behaviour. The UDP5000 lets you choose which parameter takes priority at turn-on and during mode transitions. CV-priority establishes the target voltage first — the right choice for microcontrollers, FPGAs and analog rails. CC-priority brings current up under control — the safer choice for LEDs, laser diodes and battery charging where inrush must be bounded.
 
Adjustable Slew Rate — Control How Fast Power Arrives
Voltage and current slew rates are independently settable. A slower ramp prevents inrush into capacitive loads, reduces mechanical stress on motor windings at start-up and gives sensitive analog circuits time to settle; the high-speed default mode is there when fast settling is what the test needs.
 
Internal Resistance — Simulate Real Power Sources
The internal variable-resistance function (set in CV mode, up to 0.800Ω in 1 mΩ steps) makes the terminal voltage droop with load current exactly as a battery, fuel cell or solar panel would — no physical resistor, no thermal risk, value changeable instantly from the panel or over SCPI.
 
Front & Rear Outputs — Bench-Ready and Rack-Ready
Output terminals are provided on both panels. Front terminals are there for quick prototype hookup; rear terminals keep permanent rack wiring clean. Both are the same single output — front-panel draw is limited to 10 A, so high-current loads belong on the rear.
Front and rear output terminals
 
List Mode & Discharge Control — Automate Output Sequences
List Mode runs up to 128 programmed V/I/dwell steps for 1 to 9,999, infinite cycles or continuously, stored locally or exported, executing with no PC attached — built for overnight burn-in, charge-profile runs and production routines. The internal discharge load bleeds output capacitance down rapidly when output is switched off.
 
Multi-Unit Operation — Scale When You Need More
Up to 2 identical units parallel for more current, or up to 2 series for more voltage, coordinated over the rear CAN / LS_BUS interface from the master unit or a single SCPI connection; unit-to-unit balance stays within ~5% of rated.
 
Display and Control
A 2.4-inch TFT-LCD presents voltage, current and power simultaneously with a concise multifunction keypad; external analog control (0–10 V setpoint plus digital ON/OFF) is available on the rear analog interface for closed-loop and HIL setups.
 
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