Mean Well
Mean Well DIN Rail AC MDR-20-12
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Specifications
| Brand | Mean Well |
|---|---|
| Model Number | MDR-20-12 |
| Official Product Name | 20W Single Output Industrial DIN Rail Power Supply |
| Applicable System | Industrial control panels, PLC cabinets and DIN-rail automation systems |
| Product Type | DIN Rail AC/DC Switching Power Supply |
| Equivalent Standard | IEC/EN 60950-1, UL 508, EN 61558-2-16 |
| Product Status | In Stock |
| Rated Current | 1.67 A (0-1.67 A) |
| Rated Power | 20 W |
| Input Voltage | 85-264 V AC / 120-370 V DC |
| Frequency | 47-63 Hz |
| Efficiency (typ.) | 80% |
| Ripple & Noise (max.) | 120 mVp-p |
| Voltage Tolerance | +/-1.0% |
| AC Current (typ.) | 0.55 A/115 V AC, 0.35 A/230 V AC |
| Hold-up Time (typ.) | 50 ms/230 V AC, 20 ms/115 V AC |
| Protections | Short circuit / Overload / Over voltage |
| Cooling | Free air convection |
| Mounting | DIN rail TS-35/7.5 or 15 |
| Dimensions | 22.5 x 90 x 100 mm (W x H x D) |
| Weight | 170 g |
| Operating Temperature | -30 to +70 degC |
| Safety Standards | UL 508, TUV EN60950-1, EN61558-2-16 |
| Warranty | 3 years |
| Output Voltage | 12 V DC |
Product Description
Its narrow 22.5 mm plastic housing frees up rail space in PLC cabinets and building automation panels. The unit provides short-circuit, overload and over-voltage protection, plus a DC OK relay contact and power-on LED for status monitoring. Free-air convection cooling and under 0.75 W no-load consumption suit continuous industrial duty. The Mean Well MDR-20-12 is a 20 W ultra-slim DIN rail switching power supply that converts a universal 85-264 V AC input into a regulated 12 V DC output at up to 1.67 A.
Basic Product Information
- Ultra-slim 22.5 x 90 x 100 mm plastic case for space-saving DIN rail mounting
- Short-circuit, overload and over-voltage protection with free-air convection cooling
- DC OK relay contact and LED indicator for power-on status monitoring
- No-load power consumption below 0.75 W with 80% typical efficiency
- 20 W output: 12 V DC at 1.67 A from a universal 85-264 V AC / 120-370 V DC input
Technical Specifications
Version & Model Difference
The MDR-20 series shares one 20 W platform across MDR-20-5 (5 V/3 A), MDR-20-12 (12 V/1.67 A), MDR-20-15 (15 V/1.34 A) and MDR-20-24 (24 V/1 A); only the output voltage and rated current differ. The MDR-20-12 is the 12 V model and is not interchangeable with the higher-power MDR-40 or MDR-60 series.
Application Scenarios
- PLC and control cabinets on industrial DIN rails
- Building automation and security/CCTV power
- Telecom, vending and kiosk DC power
- LED lighting and small DC loads
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Frequently Asked Questions
What output does the Mean Well MDR-20-12 provide?
It supplies a regulated 12 V DC output at up to 1.67 A (20 W) from a universal 85-264 V AC or 120-370 V DC input.
How is the MDR-20-12 mounted?
It clips onto a 35 mm DIN rail (TS-35/7.5 or 15) and uses free-air convection cooling, so no fan is needed.
What protections does it include?
Short-circuit, overload and over-voltage protection, plus a DC OK relay contact and a power-on LED indicator.
What is the operating temperature range?
The unit operates from -30 to +70 degC, with output derating above the rated ambient per the datasheet curve.
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