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The MEAN WELL RQ-125B is a 125 /W quad-output switching power supply, delivering +5 /V, +12 /V, –5 /V, and –12 /V DC outputs for industrial and electronic applications.
Product Overview
- Manufacturer: MEAN WELL
- Model: RQ-125B
- Type: Quad-output switching power supply
- Input Voltage: 88–132 /VAC / 176–264 /VAC (selectable), or 248–370 /VDC
- Frequency Range: 47–63 /Hz
- Efficiency: ~75%
- Dimensions: 199 × 98 × 38 /mm
- Weight: ~0.85 /kg
- Warranty: 3 years
Output Specifications
| Channel |
Voltage |
Rated Current |
Current Range |
Rated Power |
Ripple & Noise |
| CH1 |
+5 /V |
11 /A |
0–12 /A |
55 /W |
80 /mVp-p |
| CH2 |
+12 /V |
4.5 /A |
0–4.5 /A |
54 /W |
120 /mVp-p |
| CH3 |
–5 /V |
1 /A |
0–1 /A |
5 /W |
80 /mVp-p |
| CH4 |
–12 /V |
0.5 /A |
0–1 /A |
6 /W |
80 /mVp-p |
Total Output Power: 120 /W
Protections
- Short circuit protection
- Overload protection (105–150% rated output power)
- Overvoltage protection
- Cooling by free air convection
Key Features
- Quad outputs (+5 /V, +12 /V, –5 /V, –12 /V) for versatile applications.
- Universal AC input with selectable voltage range.
- High reliability with MTBF > 200,000 hours.
- Compact design for easy integration into equipment.
- Compliance: UL, CUL, TUV, CE safety approvals.
Applications
- Industrial control systems requiring multiple DC rails.
- Telecommunications equipment needing ± voltage supplies.
- Embedded electronics with mixed logic and analog circuits.
- Test and measurement devices requiring stable multi-output power.
Related MEAN WELL RQ Series Models
| Model |
Output Voltages (CH1–CH4) |
Total Power |
Notes |
| RQ 125A |
+5 /V / +12 /V / –12 /V / –5 /V |
125 /W |
Similar to RQ 125B but different current ratings |
| RQ 125B |
+5 /V / +12 /V / –5 /V / –12 /V |
125 /W |
The one you asked about |
| RQ 125C |
+5 /V / +15 /V / –15 /V / –5 /V |
125 /W |
Higher ±15 /V rails for analog circuits |
| RQ 125D |
+5 /V / +24 /V / –12 /V / –5 /V |
125 /W |
Includes +24 /V rail for industrial loads |
| RQ 85 Series |
Similar quad outputs, 85 /W |
Lower power version |
|
| RQ 65 Series |
Quad outputs, 65 /W |
Compact, lighter duty |
|
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