MDA400PC4.2+3.2 dual-output power supply
The Rong-Electric MDA400PC4.2+3.2 supplies separate 4.2 V and 3.2 V DC outputs for LED display applications. The manufacturer’s V1.0 specification, dated October 28, 2021, identifies it as a slim common-cathode dual-output supply. Its listed current ranges are 0–55 A on V1 and 0–35 A on V2.
For replacement or cabinet design, check both rail requirements, terminal assignments and the mechanical drawing. The model name alone does not establish a 400 W rating.
Technical specifications
| Parameter | Specification |
|---|---|
| Model | MDA400PC4.2+3.2 |
| DC outputs | V1: 4.2 V; V2: 3.2 V |
| Output current | V1: 0–55 A; V2: 0–35 A |
| Regulation accuracy | ±2% |
| Ripple and noise | V1: ≤250 mVp-p; V2: ≤200 mVp-p |
| Output power — PDF V1.0 | 343 W; original listing table: 300 W |
| AC input — PDF V1.0 | Rated: 100–240 Vac; operating range: 90–264 Vac |
| Input frequency — PDF V1.0 | 47–63 Hz |
| Efficiency — PDF V1.0 | ≥88% at 220 Vac, full load, room temperature |
| Power factor — PDF V1.0 | ≥0.95 at full load |
| Operating temperature — PDF V1.0 | −30 to +70°C; observe the specification’s derating curves and heat-spreading installation requirements |
| Cooling | Ventilation cooling |
| Dimensions — PDF V1.0 | 180 × 68 × 26 mm; original listing: 208 × 58 × 26 mm |
| Weight — PDF V1.0 | 485 g |
Check the specification revision before ordering
The linked PDF lists 343 W and 180 × 68 × 26 mm, while the original product listing states 300 W and 208 × 58 × 26 mm. Its input figures also differ: the original feature list states 180–264 Vac and its old table states 160–264 with an inconsistent DC unit. The PDF specifies AC input, rated 100–240 Vac with a 90–264 Vac operating range. These figures must not be combined into one assumed hardware specification; confirm the nameplate and revision of the unit being supplied.
The original feature list additionally gives output ranges of 4.12–4.28 Vdc and 3.13–3.26 Vdc, efficiency ≥87%, leakage current ≤1.0 mA at 242 Vac, and linear derating from +50 to +70°C. Those conditions are retained here as original-listing information, not as confirmation for every revision. Use the applicable manufacturer document for installation limits.
Installation and protection
The PDF requires good thermal contact between the supply base and a heat-spreading aluminum plate or enclosure. Keep ventilation paths clear and follow its load-versus-temperature curves. It describes input undervoltage, output current limiting and short-circuit protection. Recovery behavior differs between the two output rails; consult the PDF before troubleshooting or reconnecting a load. The original listing also mentions output overvoltage protection, which should be checked against the supplied revision.
Product images
Download specification
MDA400PC4.2+3.2 led display power supply Specification
Frequently asked questions
What output voltages does the MDA400PC4.2+3.2 provide?
It has V1 at 4.2 V DC and V2 at 3.2 V DC. The listed current ranges are 0–55 A and 0–35 A respectively; check both rail loads when selecting the supply.
Is this a common-cathode LED power supply?
Yes. The linked manufacturer V1.0 specification identifies this model as a common-cathode dual-output power supply. Confirm that your LED module wiring matches its two rails and terminal assignments.
Is the MDA400PC4.2+3.2 rated at 300 W or 343 W?
The original listing table states 300 W, while the linked V1.0 PDF states 343 W. Confirm the exact supplied revision and nameplate before using either figure in a load calculation.
What are its dimensions and AC input range?
The V1.0 PDF gives 180 × 68 × 26 mm and a 90–264 Vac operating range. The original listing has different dimensions and input figures, detailed above, so verify the supplied unit before planning mounting or mains compatibility.
Where can I download the wiring and installation specification?
Use the original PDF download link on this page. It includes the terminal layout, mechanical drawing, thermal installation requirements and protection behavior.
