MEAN WELL RT-125C is an enclosed triple-output AC/DC switching power supply. CH1 provides 5VDC at 10A, CH2 provides 15VDC at 4.5A, and CH3 provides -15VDC at 1A. Its rated combined output is 132.5W. The three DC rails are independently specified outputs, not selectable alternatives. Keep every rail within its stated current range, keep combined loading within the rated total output, and use the selected AC input range required by the datasheet.Technical details below were checked against the MEAN WELL English series datasheet. Confirm final wiring, protection coordination, enclosure design, cooling, and derating against the datasheet before system integration.Features Three independently specified DC rails - CH1 is 5VDC at 10A, CH2 is 15VDC at 4.5A, and CH3 is -15VDC at 1A. Combined output limit - Each rail has its own current range; combined loading must not exceed the 132.5W rated output. Multi-output loading condition - For the listed output tolerances, MEAN WELL recommends CH1 load above 20% of its rated current for C type; verify the full multi-output loading conditions in the datasheet. CH1 voltage adjustment - CH1 can be adjusted from 4.75-5.5V. Selectable AC input - Accepts 88-132VAC / 176-264VAC selected by switch, or 248-373VDC at 47-63Hz according to the English series datasheet. Free-air convection cooling - Uses fanless cooling; validate enclosure airflow and derating for the completed system. Protection functions - Includes short-circuit and overload protection, with hiccup-mode recovery after a fault condition is removed; CH1 also has over-voltage protection. Enclosed terminal design - Uses a metal enclosure measuring 199 x 98 x 38mm with screw terminals for installed equipment. Reliability provisions - MEAN WELL lists 105C long-life electrolytic capacitors, a full-load burn-in test, and a 3-year warranty for this series. Specifications Product MEAN WELL RT-125C triple-output switching power supply Series RT-125 Output configuration Three independently specified DC output rails Output loading condition For the listed output tolerances, MEAN WELL recommends CH1 load above 20% of its rated current for C type; verify the full multi-output loading conditions in the datasheet. CH1 rated output 5VDC, 10A CH1 current range 0-12A CH1 voltage adjustment 4.75-5.5V CH1 ripple and noise 80mVp-p maximum CH2 rated output 15VDC, 4.5A CH2 current range 0-6A CH2 ripple and noise 150mVp-p maximum CH3 rated output -15VDC, 1A CH3 current range 0-1A CH3 ripple and noise 150mVp-p maximum Rated combined output 132.5W Typical efficiency 79% Input voltage range 88-132VAC / 176-264VAC selected by switch, or 248-373VDC Input frequency 47-63Hz Cooling Free-air convection Protection Short circuit and overload hiccup protection; CH1 over-voltage protection Operating ambient -25 to 70C; follow the datasheet derating curve Dimensions 199 x 98 x 38mm Warranty 3 years Reference DocumentsMEAN WELL RT-125 Series Datasheet - English PDFApplication Industrial control - Power compatible multi-rail control electronics after checking rail loading, wiring, and thermal margin. Automation equipment - Use in a documented system that observes each rail limit, total output limit, and selected input-voltage setting. Electronic instruments - Supply compatible circuits that require the stated positive and negative rails within the datasheet conditions. Installed equipment - Integrate only in a completed design that meets applicable electrical and safety requirements. Packing List Item Quantity MEAN WELL RT-125C triple-output switching power supply x1 FAQ.faq-accordion details{border-bottom:1px solid #e6eef8;padding:14px 0}.faq-accordion summary{cursor:pointer;font-size:16px;font-weight:700;color:#1f2933}.faq-accordion p{margin:12px 0 0;color:#4b5563;line-height:1.65} What outputs does the RT-125C provide?CH1 is 5VDC at 10A, CH2 is 15VDC at 4.5A, and CH3 is -15VDC at 1A. Can all three rails be used at the same time?Yes, when each rail remains in its specified current range and combined loading does not exceed 132.5W. Is there a minimum loading condition?For the listed output tolerances, MEAN WELL recommends CH1 load above 20% of its rated current for C type; verify the full multi-output loading conditions in the datasheet. Which output is adjustable?CH1 can be adjusted from 4.75-5.5V. How is the AC input range selected?Use the selectable AC input range stated in the datasheet and confirm the switch setting before energizing the unit. Does it use a cooling fan?No. It uses free-air convection, so confirm enclosure airflow and derating before installation. What is included?The packing list includes one MEAN WELL RT-125C triple-output switching power supply.
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