MDA400PC4.2+3.2 LED Display Power Supply
The Rong-Electric MDA400PC4.2+3.2 is a dual-output power supply for common-cathode LED displays. The retained V1.0 manufacturer PDF, dated 2021-10-28, lists separate 4.2V and 3.2V output channels. The data below is attributed to that document.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | MDA400PC4.2+3.2 |
| Output power in PDF main electrical table | 343W |
| V1 rated output / current range | +4.2Vdc / 0–55A |
| V2 rated output / current range | +3.2Vdc / 0–35A |
| Rated input voltage in PDF | 100–240Vac |
| Input voltage range in PDF | 90–264Vac |
| Input frequency | 47–63Hz |
| Cold-start efficiency | ≥88% at 220Vac, full load and room temperature |
| Power factor | ≥0.95 at full load |
| Cooling | Ventilation cooling; follow the PDF aluminium-baseplate installation requirements |
| Dimensions (L × W × H) | 180 × 68 × 26mm; dimensional tolerance about ±1mm |
Selection and Installation
Confirm both voltage rails and their individual load currents against the LED module design. Follow the PDF channel-specific protection behavior, terminal definitions and derating curves. Its installation section requires thermal contact with an aluminium plate or equivalent enclosure arrangement; review those instructions before mounting.
Frequently Asked Questions
1. Is MDA400PC4.2+3.2 a dual-output power supply?
Yes. The manufacturer PDF lists V1 at +4.2Vdc with 0–55A and V2 at +3.2Vdc with 0–35A.
2. Does the model name mean it is rated at 400W?
The retained manufacturer PDF main electrical table lists 343W. Do not substitute a wattage inferred from the model name.
3. Can the two output channels be treated as interchangeable?
No. They have different specified voltages and current ranges. Follow the PDF terminal definitions and match each rail to the LED module design.
4. Where can I check input and installation requirements?
The original PDF below lists its 100–240Vac rated input, 90–264Vac input range, derating curves and aluminium-baseplate mounting requirements. Confirm the supplied revision when ordering.




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