Rong-Electric MD400PC4.2+3.2H Dual-Output LED Power Supply
$ 31.00
The Rong-Electric MD400PC4.2+3.2H is a dual-output common-cathode LED supply with 4.2 V/55 A and 3.2 V/35 A ratings. Without auxiliary heat dissipation, the documented currents reduce to 44 A and 28 A respectively.
5000 in stock
Dual-output supply for common-cathode LED displays
The Rong-Electric MD400PC4.2+3.2H provides separate 4.2 V and 3.2 V outputs in a 208 × 58 × 26 mm housing. The specification identifies it as a thin common-cathode supply and gives individual current limits for each output.
Select this model using both rail currents and the cooling arrangement. Peak pulse limits are not continuous-current ratings, and the two outputs have different fault-recovery behavior. The table below preserves those distinctions and the lower current limits specified for operation without auxiliary heat dissipation.
Technical specifications
| Parameter | Specification |
|---|---|
| Model / design | Rong-Electric MD400PC4.2+3.2H; thin dual-output common-cathode supply |
| Output VO1 | 4.2 V DC; 0–55 A |
| Output VO2 | 3.2 V DC; 0–35 A |
| Output-voltage ranges | VO1: 4.12–4.28 V DC; VO2: 3.13–3.26 V DC |
| Peak pulse current | VO1: 60.5 A maximum; VO2: 38.5 A maximum; average current must remain ≤55 A / ≤35 A respectively |
| Without auxiliary heat dissipation | Derated current: VO1 44 A; VO2 28 A |
| Rated / operating AC input | 200–240 V AC rated; 180–264 V AC range |
| Input frequency | 47–63 Hz |
| Efficiency / power factor | ≥87% at 220 V AC, full load and room temperature; PF ≥0.95 at full load |
| Maximum input / inrush current | ≤5.5 A / ≤120 A at 220 V AC |
| Voltage, load and overall regulation | Each ±2% |
| Ripple and noise | VO1 ≤250 mVp-p; VO2 ≤200 mVp-p; full load, 20 MHz measurement with specified output capacitors |
| Turn-on delay / rise time | ≤3,000 ms / ≤100 ms |
| Hold-up time | ≥10 ms at 220 V AC |
| Capacitive startup load | VO1 ≤10,000 µF; VO2 ≤10,000 µF at full load |
| Working temperature and derating | −30°C to +70°C; 100% load through 50°C, 75% at 60°C and 50% at 70°C |
| Working humidity | 10–90%, non-condensing |
| Cooling | Natural cooling with auxiliary aluminum heat dissipation; follow section 6.5 mounting requirements |
| VO1 overcurrent behavior | Above 65 A with VO2 fully loaded: both outputs turn off and recover automatically |
| VO2 overcurrent behavior | Above 39 A with VO1 fully loaded: VO2 latches off while VO1 is maintained |
| Short-circuit behavior | VO1: recoverable shutdown; VO2: latch-off requiring power cycling |
| Other stated protection | Output overvoltage protection listed in the feature overview |
| Dimensions / weight | 208 × 58 × 26 mm, approximately ±1 mm; weight approximately 556 g (overview limit ≤556 g) |
| Input / output pin order | Input pins 1–3: earth, N, L; output pins 1–4: +VO1, GND, GND, +VO2 |
| Reference | MD400PC4.2+3.2H specification V1.0, 2023-09-27 |
Product images and specification download
MD400PC4.2+3.2H Rong-Electric led Power Supply Specification
Frequently asked questions
What are the two output ratings?
VO1 is 4.2 V DC at 0–55 A and VO2 is 3.2 V DC at 0–35 A. These are separate rail ratings. Match each LED module supply input to the correct output; the model name alone is not used to assert a 400 W output rating.
Can it supply full rated current without an added heatsink?
No. The output table specifies reduced currents of 44 A for VO1 and 28 A for VO2 without auxiliary heat dissipation. The environmental section requires an aluminum heat-dissipation arrangement and refers to the mounting guidance in section 6.5.
What changes when the cabinet temperature reaches 60°C or 70°C?
The published temperature curve gives 75% load at 60°C and 50% at 70°C, compared with 100% through 50°C. Apply those conditions together with the specified cooling arrangement.
Why might the 3.2 V output stay off after a short circuit?
The protection table specifies latch-off for a VO2 short circuit and recovery by power cycling. VO1 is described as recoverable. Remove the fault before attempting recovery and follow the model-specific procedure.
Can this model run on 110 V AC?
No. The model-specific input range is 180–264 V AC. A generic explanatory note elsewhere in the PDF uses a different input-range example; that example does not replace the MD400PC4.2+3.2H input ratings.
| Weight | 0.5 kg |
|---|
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