MODEL CODE GUIDE
Overview
The model naming of MEAN WELL power supplies is relatively simple, usually consisting of three segments: "series code + rated power (W) + output voltage (V)".
Take LRS-350-24 as an example: LRS is the series code (enclosed low-profile power supply), 350 indicates the rated power of 350W, and 24 indicates the output voltage of 24VDC.
code structure table
| field | Meaning | example |
|---|---|---|
| LRS | series code | Enclosed low profile power supply |
| 350 | rated power (W) | 350W |
| 24 | output voltage (VDC) | 24V |
Common series code comparison table
| Series | features | power range |
|---|---|---|
| LRS | Enclosed low-profile power supply with high cost performance | 35–1200W |
| NDR | Economical rail power supply | 75–480W |
| SDR | High efficiency rail power supply with built-in active PFC | 75–960W |
Selection Notes
In the same power range, the main difference between NDR and SDR is whether it has built-in active PFC and conversion efficiency. SDR is preferred in situations with higher harmonic control requirements or poor power grid quality.
The number at the end of the model is the nominal output voltage and does not represent the adjustable range. Please check the specific specifications for the actual fine-tuning range.
Even if the power of different series is the same, the appearance and mounting format may be completely different (for example, LRS is a closed power supply, and NDR/SDR is a DIN rail power supply). You need to confirm the installation method before selecting.
Frequently Asked Questions
What does LRS-350-24 specifically mean?
LRS series (enclosed power supply), rated power 350W, output voltage 24VDC.
How to choose between NDR and SDR?
If the site has requirements for power grid harmonic control or higher conversion efficiency, the SDR series with built-in active PFC is preferred; in general industrial control situations, NDR is more cost-effective.
Can the output voltage be adjusted?
Most models support fine-tuning the output voltage within a small range through the panel potentiometer. The specific adjustable range is subject to the corresponding specification.
Need help confirming a part number or application?
Send the complete part number, BOM, nameplate or product photos. Documents and images can be shared through WhatsApp, Telegram or WeChat.
