RT-125B - Power Supply Mean Well - Free user manual and instructions
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| Product Type | Power Supply |
| Brand | Mean Well |
| Model | RT-125B |
| Input Voltage | 100-240 VAC (universal) |
| Input Frequency | 47-63 Hz |
| Output 1 | +5V / 2.0A |
| Output 2 | +12V / 4.0A |
| Output 3 | -12V / 0.5A |
| Total Power | 125W |
| Dimensions (L x W x H) | 199 x 98 x 38 mm |
| Weight | 0.6 kg |
| Cooling | Free air convection |
| Protection | Short circuit, overload, over voltage, over temperature |
| Operating Temperature | -20°C to +60°C (derating) |
| Storage Temperature | -40°C to +85°C |
| Safety Standards | UL, CUL, TUV, CB, CE |
| Efficiency | Typically 78% |
| Ripple & Noise | < 1% of output voltage |
| Mounting | Chassis mount, screw terminals |
| Warranty | 2 years |
Frequently Asked Questions - RT-125B Mean Well
What are the output voltages and currents of the Mean Well RT-125B?
The RT-125B provides three outputs: +5V/2A, +12V/4A, and -12V/0.5A, with a total power of 125W.
How do I connect the input wires to the RT-125B?
Connect the AC input to the screw terminals labeled 'AC L' (live), 'AC N' (neutral), and 'FG' (ground). Ensure proper grounding for safety.
Can the RT-125B be used in series or parallel?
The outputs are not designed for series or parallel operation. Use each output independently.
What protection features does the RT-125B have?
It includes short circuit, overload, over voltage, and over temperature protection.
What is the operating temperature range?
The operating temperature is -20°C to +60°C, with derating above 50°C.
How do I adjust the output voltage?
Some models may have a trim pot, but the RT-125B typically has fixed outputs. Check the label for adjustment options.
What is the recommended minimum load?
For stable regulation, a minimum load of 10% on each output is recommended, especially the +5V output.
How do I clean the power supply?
Disconnect AC power and use a dry cloth to wipe the enclosure. Avoid liquids and compressed air near electronic components.
What should I do if the power supply shuts down unexpectedly?
Check for overload, short circuit, or excessive temperature. Ensure ventilation is adequate and load is within specifications.
Is the RT-125B compliant with safety standards?
Yes, it is certified to UL, CUL, TUV, CB, and CE standards.
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USER MANUAL RT-125B Mean Well
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Product information
Brand : Mean Well
Model : RT-125B
Category : Power Supply