5V DC power for LED display modules
The YuanChi YC-400W16-5V is a 5V 80A 400W LED screen power supply with isolated input and output and half-bridge LLC resonant conversion. Its slim housing can be assessed against the space available inside an LED cabinet.
Technical specifications
The values below are from the linked YuanChi specification, revision V1.0, dated December 1, 2021. Check the label and revision of the supplied unit when planning a replacement.
| Parameter | Specification |
|---|---|
| Model | YC-400W16-5V |
| DC output | 5.0V; ±5% regulation |
| Rated output current / power | 80A / 400W |
| Peak output current | 85A; not the rated current |
| Nominal AC input | 200–240VAC |
| AC input range / frequency | 176–264VAC / 47–63Hz |
| Full-load efficiency | At least 91% at 230VAC |
| Power factor | Greater than 0.95 at 220VAC |
| Dimensions (L × W × H) | 220 × 47.6 × 26mm |
| Weight | Approximately 450g |
| Operating temperature | −40°C to +50°C; observe the datasheet derating curves |
| Cooling | Natural ventilation |
| Protection | Overcurrent, short circuit and overtemperature |
Choosing a replacement for an LED cabinet
- Match the module voltage: verify the module label and required supply voltage before selecting a replacement.
- Check the complete load: use the module manufacturer’s maximum consumption and the number of connected modules. Allow for wiring losses and the project’s design margin.
- Check physical fit: compare mounting positions, terminal access and cable clearance with the existing unit, as well as the housing dimensions.
- Plan heat removal: follow the input-voltage and temperature derating curves in the specification. Do not assume the headline rating is available under every cabinet condition.
For a replacement inquiry, provide the existing power-supply label, module voltage, total load and mounting measurements through our contact page. You can also compare products in the LED power supply category.
Frequently asked questions
Can this model run from a 110V AC supply?
No. 110VAC is outside the specified input range shown above. Select a supply whose documented AC input matches the installation.
How many LED modules can one supply power?
There is no fixed module count. Divide the usable power budget by each module’s maximum consumption, then account for derating, wiring losses and design margin. Confirm the result against the cabinet design.
Is the peak current suitable for continuous loading?
Use the rated current for load planning. The peak figure is a separate specification and should not replace the rated value.
What happens after a short circuit?
The specification describes a latched shutdown. After the fault is corrected, AC power must be disconnected and reapplied to restart the supply.
Where can I check the full technical details?
Use the specification download below for test conditions, derating curves, terminal definitions and mounting guidance. Compare these details with the unit you are replacing.
Original specification image and product photos
YuanChi YC-400W16-5V LED Screen power supply Electrical Specification:
Product photos
