LRS-350-4.2 Low-Voltage LED Power Supply
The Mean Well LRS-350-4.2 serves LED equipment requiring a nominal 4.2V DC source. The output is rated at 60A and 252W. The model name belongs to the LRS-350 family, but its power rating differs from the higher-voltage versions.
| Parameter | Specification |
|---|---|
| Nominal output | 4.2V DC |
| Rated current / power | 60A / 252W |
| Output adjustment | 3.6–4.4V |
| AC input | 90–132VAC / 180–264VAC, selected by switch |
| Frequency | 47–63Hz |
| Typical efficiency | 81.5% |
| Dimensions (L × W × H) | 215 × 115 × 30mm |
| Cooling | Built-in DC fan with on/off control |
| Working temperature | −25 to +70°C; follow derating curves |
Match the supply to the LED module
Confirm the module’s required voltage before selecting the 4.2V version. Plan the current distribution and cable runs to limit voltage drop, and leave space around the fan and vents. Set the AC input selector to match the mains supply before power is applied.
Frequently Asked Questions
Why is LRS-350-4.2 rated at 252W?
This version is specified at 4.2V and 60A, giving its listed rated power of 252W. The LRS-350 name identifies the series.
Can I adjust LRS-350-4.2 to 5V?
No. The specified adjustment range is 3.6–4.4V. A 5V load needs a suitable 5V model.
Does it automatically switch between AC input ranges?
No. The AC input range is selected by a switch: 90–132VAC or 180–264VAC.
Is the typical efficiency 89%?
The 4.2V model’s listed typical efficiency is 81.5%. A series maximum must not be applied to every voltage version.
Does it provide full current at 70°C?
Do not assume full output at the upper temperature limit. Use the manufacturer’s derating curve for the actual installation conditions.
Product Photos
Specification PDF
Meanwell LRS-350-4.2 4.2V60A 252W Input Voltage Selectable LED Power Supplies Specification
