Mean Well LRS-50-5: 5V Power Supply with 50W and 10A for LED Strips and Electronics
The Mean Well LRS-50-5 is an enclosed 5V switching power supply (constant voltage) with 50 W power and up to 10 A output current. It is particularly suitable for addressable 5V LED strips such as WS2812B and SK6812, for LED pixels, matrices and displays, as well as for microcontroller projects with ESP32, Arduino or Raspberry Pi. With its power, it is ideal for small installations.
The power supply operates with a typical efficiency of 86% and reliably protects your installation against short circuits, overloads, overvoltage and overtemperature. The output voltage can be finely adjusted from 4.5 to 5.5 V via a potentiometer to compensate for voltage drops on the supply line. Cooling is passive, so the power supply operates completely silently. As a branded power supply from the proven LRS series, it offers a very long service life and a 3-year manufacturer's warranty.
Technical Data Mean Well LRS-50-5
| Manufacturer / Model |
Mean Well LRS-50-5 |
| Output Voltage |
5 V DC |
| Output Voltage Adjustment Range |
4.5 to 5.5 V (Potentiometer) |
| Output Current |
0 to 10 A |
| Rated Power |
50 W |
| Input Voltage |
85 to 264 V AC, 120 to 373 V DC |
| Efficiency (typ.) |
86% |
| Voltage Tolerance |
±2% |
| Residual Ripple (Ripple & Noise) |
max. 80 mVp-p |
| Protection Functions |
Short circuit, overload, overvoltage, overtemperature |
| Cooling |
Passive convection, fanless and silent |
| Operating Temperature |
-30 °C to +70 °C |
| Humidity |
20% to 90% relative humidity, non-condensing |
| Protection Rating |
IP20 (indoor use only) |
| Connection |
Screw terminal block |
| Dimensions (L x W x H) |
99 x 82 x 30 mm |
| Weight |
approx. 210 g |
| Service Life (MTBF) |
min. 3,149,800 hours |
| Safety |
IEC/EN/UL 62368-1, CE, RoHS |
| Warranty |
3-year manufacturer's warranty |
Frequently Asked Questions about the Mean Well LRS-50-5
How many LEDs can I power with the LRS-50-5?
The LRS-50-5 delivers up to 10 A. If you calculate around 60 mA per WS2812B LED at full white brightness and plan for a 20% reserve, it powers approximately 130 LEDs. This corresponds to around 2.2 m of LED strip with 60 LEDs/m. In everyday use with colors, effects, or dimmed brightness, the consumption is usually significantly lower.
Is the LRS-50-5 suitable for WS2812B, SK6812, and other addressable LED strips?
Yes. The power supply delivers a stable 5 V DC and is suitable for all 5V LED strips and pixels, for example WS2812B, SK6812, WS2811 (5V), APA102, SK9822, as well as 5V single-color strips. For control, you additionally need a suitable controller, such as a WLED controller or a microcontroller like ESP32 or Arduino.
Can I adjust the output voltage?
Yes. The voltage can be adjusted from 4.5 to 5.5 V via the potentiometer next to the terminals. This allows you to compensate for a slight voltage drop on the supply line. Set the voltage using a measuring device and try not to exceed 5.2 V at the LED strip.
How often do I need to inject power into 5V LED strips?
At 5 V, high currents flow, which is why the voltage drops faster on the strip than at 12 V or 24 V. As a rule of thumb, you should inject power into 5V LED strips again approximately every 2 to 3 meters and use sufficiently thick supply lines. This prevents color shifts towards red and uneven brightness.
Is the LRS-50-5 dimmable or waterproof?
No. It is a constant voltage power supply without a dimming function. Dimming is done via the LED controller on the output side. With a protection rating of IP20, the power supply is only intended for dry indoor spaces, control cabinets, or enclosures.
Why a Mean Well power supply?
Mean Well is one of the world's leading manufacturers of switching power supplies. The LRS series is a proven industry standard with a long service life, tested safety according to IEC/EN/UL 62368-1, low residual ripple, and a 3-year manufacturer's warranty. Especially in 5V projects with high currents, a power supply with a clean, stable output voltage pays off.
Mean Well LRS 5V Series at a Glance
Do you need more or less power? All 5V power supplies in the LRS series have the same height of 30 mm and can be easily replaced.
| Model |
Power |
Current |
Dimensions (L x W x H) |
WS2812B LEDs* |
| LRS-50-5 (this product) |
50 W |
10 A |
99 x 82 x 30 mm |
approx. 130 |
| LRS-100-5 |
90 W |
18 A |
129 x 97 x 30 mm |
approx. 240 |
| LRS-150F-5 |
110 W |
22 A |
159 x 97 x 30 mm |
approx. 290 |
| LRS-200-5 |
200 W |
40 A |
215 x 115 x 30 mm |
approx. 530 |
| LRS-350-5 |
300 W |
60 A |
215 x 115 x 30 mm |
approx. 800 |
* Guideline at full white brightness (approx. 60 mA per LED) and 20% power reserve. With colors, effects, or reduced brightness, significantly more LEDs are possible.
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