Power Adapter MEAN WELL DRA-40-12 40W 12V 90-264V

The MEAN WELL DRA-40-12 is an AC-DC industrial DIN-rail power supply that delivers 12V DC at up to 3.34A (40W). It accepts a wide input voltage range of 90–264V AC and comes in a compact plastic enclosure sized 40mm (W) × 100mm (D) × 90mm (H). The unit complies with RoHS requirements and is intended for applications that need a stable 12V DC rail on DIN mounting.

Advantages

This DIN-rail power supply provides a stable 12V output with 40W total power and supports dimming control via 0–10V DC / PWM / resistance input. Its wide AC input range allows use in international mains systems, while the compact plastic case and DIN-rail mounting save panel space and simplify installation. RoHS compliance ensures adherence to environmental safety standards.

Suitable for

• Industrial control cabinets and automation systems
• LED lighting drivers and dimming circuits using 0–10V or PWM control
• Embedded electronics and small appliances requiring 12V DC
• Field installations where DIN-rail mounting is required

Key specifications

• Brand: mean well
• Model: DRA-40-12 (MPN: DRA-40-12)
• Output: 12V DC, 3.34A, 40W
• Input voltage: 90–264V AC
• Dimensions: 40 × 100 × 90 mm (W × D × H)
• Case: plastic, DIN-rail mount
• Control: Dimming via 0–10V DC, PWM or resistance
• Compliance: RoHS
• EAN: 4021087038690

How to use

Mount the power supply on a standard DIN rail and connect the AC input to a correctly rated mains supply within 90–264V AC. Connect the 12V DC output to the load ensuring the combined current does not exceed 3.34A. For dimming control, use the 0–10V DC input or apply an appropriate PWM or resistance control signal according to the installation wiring diagram. Ensure proper wiring, secure terminal connections and observe polarity when connecting the DC output.

Recommendations

Install the unit in a well-ventilated enclosure and avoid placing it near heat sources. Use appropriate fusing on the input and follow local electrical codes. Verify load current and derating requirements in high-temperature environments to ensure reliable long-term operation.