— Vartech® DC Power Supplies
5020 SR 50V / 20A SMPS DC Regulated Power Supply with PC Interface (1000W)
0–50 V, 0–20 A, 1000 W SMPS supply — 4-digit LED, USB/RS232/RS485 interface, ModBus-RTU, OVP/OCP/OPP/OTP.
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About This Instrument
The Vartech 5020 SR is a 1000 W single-output SMPS power supply delivering 0–50 V / 0–20 A with PC interface. The 50 V range suits EV module testing, LED driver testing and power electronics research. Features PWM control, auto CV/CC, adjustable OVP/OCP/OPP, encoder coarse & fine control, preset V & I, Output On/Off, 4-digit LED displays and ModBus-RTU communication via USB.
Key Features
- Advanced PWM (SMPS) control technology — compact and light weight
- Auto CV/CC switch with Coarse & Fine encoder control for V and I
- Pre-setting of voltage & current with Output ON/OFF switch
- OVP (adjustable, ≤110% FS), OCP (≤110% FS), OPP (≤100% FS), OTP protections
- 4-digit LED displays for voltage and current (set + readback)
- PC interface: USB standard (RS232 / RS485 optional); ModBus-RTU protocol
- Intelligent temperature-controlled cooling fan
- Low ripple & noise (≤ 0.5% FS rms)
Technical Specifications
| Output Power | 1000 W |
| Output Voltage | DC 0–50 V (full range adjustable) |
| Output Current | DC 0–20 A (full range adjustable) |
| Working Mode | PWM (SMPS) |
| OVP Range | DC 1–110 % FS (adjustable) |
| OCP Range | DC 1–110 % FS |
| OPP Range | DC 1–100 % FS |
| Line Regulation | ≤ 0.5 % FS |
| Load Regulation | ≤ 0.5 % FS |
| Ripple & Noise | ≤ 0.5 % FS rms |
| Setting Accuracy | 0.1 % FS + 1 digit |
| Readback Accuracy | 0.1 % FS + 1 digit |
| Display | 4-digit LED — Voltmeter + Ammeter |
| Voltage Resolution | 0.000–9.999 V | 00.00–99.99 V | 000.0–999.9 V (auto) |
| Current Resolution | 0.000–9.999 A | 00.00–99.99 A | 000.0–999.9 A (auto) |
| PC Interface | USB standard (RS232 or RS485 at request) | ModBus-RTU protocol |
| Protection | OVP, OCP, OTP, OPP |
| Operating Temp. & Humidity | 0 °C to 40 °C | < 80 % RH |
| Storage Temp. & Humidity | -10 °C to 70 °C | < 80 % RH |
| Power Supply | AC 110 V / 220 V ±10 %, 50/60 Hz |
| Input Module | Power socket or terminal block |
| Dimensions | 260 × 160 × 380 mm (L chassis, 500 W–3000 W) | 260 × 160 × 440 mm (XL chassis, 1800 W–5000 W) |
| Weight | Approx. 4.5 kg |
Specifications sourced from the official Vartech product catalogue. Download above for the full datasheet.
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