We use cookies to make your experience better. To comply with the new e-Privacy directive, we need to ask for your consent to set the cookies. Learn more.
Mean well MDR-40-12 40 Watt Power Supply 12V 3.3A output
MPN: MDR-40-12
Alt. SKU: MDR4012
£29.28
£24.40
Why Choose the Mean Well MDR-40-12 40 W DIN Rail Power Supply?
The Mean Well MDR-40-12 is a compact and industrial-grade 40 W DIN rail power supply engineered to deliver a stable 12 V DC output at 3.33 A for control panels, automation systems, communication interfaces, sensors and embedded electronics. Featuring a universal AC/DC input range, efficient fanless convection cooling and built-in protections, the MDR-40-12 offers dependable performance in tight enclosures and varied global installations. :contentReference[oaicite:0]{index=0}
Ideal for panel builders, system integrators and maintenance technicians, this DIN rail power supply combines Mean Well’s trusted reliability with a slimline form factor that helps maximise usable space and simplifies installation. :contentReference[oaicite:1]{index=1}
Product Code: Mean Well MDR-40-12
Key Benefits
- Stable 12 V output: Provides regulated 12 V DC at up to 3.33 A for industrial control and automation loads. :contentReference[oaicite:2]{index=2}
- Universal AC/DC input: Compatible with 85–264 V AC or 120–370 V DC supply voltage — ideal for global installations. :contentReference[oaicite:3]{index=3}
- Fanless convection cooling: Quiet, low-maintenance operation suitable for enclosed panels. :contentReference[oaicite:4]{index=4}
- Compact DIN rail design: Space-saving profile for efficient control cabinet layouts. :contentReference[oaicite:5]{index=5}
- Built-in protections: Includes short circuit, overload and overvoltage safeguards for enhanced system safety. :contentReference[oaicite:6]{index=6}
- Low no-load consumption: Efficient energy use with low idle power draw typical of the MDR series. :contentReference[oaicite:7]{index=7}
Technical Specifications
- Manufacturer: Mean Well
- Model: MDR-40-12
- Output Voltage: 12 V DC
- Output Current: 3.33 A
- Rated Output Power: 40 W
- Input Voltage Range: 85–264 V AC / 120–370 V DC
- Input Frequency: 47–63 Hz
- Cooling Method: Free air convection (fanless)
- Mounting: DIN rail TS-35/7.5 or TS-35/15
- Protections: Short circuit, overload, overvoltage
- No-load Power Consumption: <e; 0.75 W
- Isolation Voltage: 3000 VAC input-to-output
- Dimensions: ~40 × 90 × 100 mm
- Operating Temperature: -20 °C to +70 °C (with derating)
- Approvals: UL508, TUV/EN62368-1, CE, CB, cURus (typical series approvals) :contentReference[oaicite:8]{index=8}
Compatibility
The Mean Well MDR-40-12 is designed for systems requiring a compact, reliable 12 V DC DIN rail power supply with broad input compatibility and robust industrial performance. Always confirm that the output voltage and current match your application’s requirements before installation.
Applications
- Industrial control cabinets and machine automation
- PLC power distribution and sensor networks
- Embedded controllers, HMIs and communication modules
- Instrumentation and data acquisition systems
- Access control and building automation equipment
- Maintenance replacement and system upgrades
Supplied as a new, unused genuine Mean Well power supply, ideal for professional electrical installations and industrial automation environments.
Frequently Asked Questions
What output voltage and current does the MDR-40-12 provide?
The Mean Well MDR-40-12 delivers a regulated 12 V DC output at 3.33 A, providing 40 W of power for industrial control and automation loads. :contentReference[oaicite:9]{index=9}
What input voltages does the MDR-40-12 support?
This power supply accepts a wide input range — 85–264 V AC or 120–370 V DC — making it suitable for various global installations. :contentReference[oaicite:10]{index=10}
Does the MDR-40-12 require a fan or special cooling?
No. It uses free air convection cooling, which eliminates the need for fans and reduces noise and maintenance. :contentReference[oaicite:11]{index=11}
What protections are built in?
It includes short circuit, overload and overvoltage protections to safeguard both the power supply and connected devices. :contentReference[oaicite:12]{index=12}
Is this unit suitable for continuous industrial use?
Yes. With robust approvals and Mean Well’s proven reliability, the MDR-40-12 is suitable for continuous operation in industrial environments. :contentReference[oaicite:13]{index=13}
Common Search Terms
MDR-40-12, Mean Well MDR-40-12, 12 V 40 W DIN rail power supply, industrial DIN rail PSU, automation power supply, MDR40-12 installation.
| Manufacturer Part Number | MDR-40-12 |
|---|---|
| Barcode | 4711287422015 |
| Manufacturer | Meanwell |
| Output Voltage | 12VDC |
| Output Current | 3.3A |
| Input Phases | Single Phase |
| Alternative Product SKU | MDR4012 |
Write Your Own Review
| The Mean Well DIN rail single phase range of MDR and DR power supplies are ideal for use inside control panels and powering a variety of other industrial applications within the control and automation market. The switched-mode PSUs within this range boast a miniature profile; perfect for when space is of a premium. The units range from 10 Watts to 100 Watts with output voltages between 5V and 48V DC. |
