MEAN WELL RD-125A 5V & 12V Dual Output Power Supply
$ 25.50
MEAN WELL RD-125A provides 5V and 12V outputs, each rated at 7.7A, with 130.9W total rated power. It uses free-air convection cooling and a switch-selected AC input range.
9999 in stock
Two DC rails from one enclosed supply
The MEAN WELL RD-125A is a dual-output power supply for equipment requiring both 5V and 12V DC. Its two channels are rated at 7.7A each, with 130.9W total rated power. The load on each rail and the combined output power must both be checked during selection.
RD-125A specifications
| Parameter | Specification |
|---|---|
| Output channels | CH1: 5V DC; CH2: 12V DC |
| Rated current | CH1: 7.7A; CH2: 7.7A |
| Total rated power | 130.9W |
| Current range | CH1: 0–12A; CH2: 0–10A; combined power must remain within rating |
| Voltage adjustment | CH1: 4.75–5.5V |
| AC input | 88–132VAC or 176–264VAC, selected by switch |
| Frequency | 47–63Hz |
| Typical efficiency | 82% |
| Maximum ripple and noise | CH1: 80mVp-p; CH2: 120mVp-p; datasheet test conditions apply |
| Dimensions (L × W × H) | 199 × 98 × 38mm |
| Working temperature | −25°C to +70°C; follow derating curve |
| Cooling | Free-air convection |
Input selection and load distribution
Set the input selector to the correct range for the AC supply before use. This is a switched input design, so the two AC ranges should not be read as one automatic 88–264VAC range.
The datasheet permits operation within each channel’s current range, provided total rated output power is not exceeded. It also recommends a CH1 load above 15% of its rated current to meet the specified voltage tolerance. Review these conditions when one output carries a much lighter load than the other.
Frequently asked questions
What is the difference between RD-125A and RD-125B?
RD-125A has 5V and 12V outputs. RD-125B has 5V and 24V outputs, so the second output voltage is different.
Is the RD-125A input automatically selected?
No. Its AC input ranges are 88–132VAC and 176–264VAC, selected by switch. Verify the setting before operation.
Can both outputs run at the top of their current ranges together?
Do not assume that. Each output must remain within its current range and the combined load must not exceed the 130.9W rated output power.
Does load on the 5V rail affect the specified output tolerance?
Yes. The datasheet recommends loading CH1 above 15% of rated current to meet the stated voltage tolerance. Check the load conditions in the PDF for your application.
Product images and specification download
| Weight | 0.8 kg |
|---|
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