Power adapter/inverter MEAN WELL RDDW20G-12, 20 W, Input 18–75 V, Output 12 V, RoHS

MEAN WELL RDDW20G-12 is a DC-DC railway dual output converter configured to deliver a fixed output of ±12 VDC (each rail at ±0.835 A) from a wide 18–75 V DC input range. The module provides 1.5 kVDC input-to-output isolation, remote ON/OFF control and comes in a compact DIP through-hole package intended for applications where a small, lightweight isolated converter is required.

Advantages

The converter offers a wide input voltage range (18–75 V) suitable for varied DC sources, dual output rails of ±12 V for bipolar supply needs, and 1.5 kVDC isolation between input and output for safety and noise separation. Its DIP through-hole form factor simplifies PCB mounting, and the remote ON/OFF feature enables system-level control. The unit is RoHS-compliant and designed for compact installation with a depth of 50.8 mm and a weight of 35 g.

Suitable for

• Embedded electronics requiring bipolar ±12 V supplies
• Industrial control panels and instrumentation
• Automotive and transportation systems with 18–75 V DC rails
• Solar or battery-powered equipment needing isolated DC-DC conversion

Key specifications

• Manufacturer: MEAN WELL (model RDDW20G-12, MPN: RDDW20G-12, EAN: 4021087048576)
• Power: 20 W
• Input voltage: 18–75 V DC
• Output: ±12 V DC, ±0.835 A per rail
• Isolation: 1.5 kVDC input-to-output
• Package: DIP through-hole
• Features: Remote ON/OFF, RoHS compliant
• Dimensions: depth 50.8 mm; weight 35 g

How to use

Mount the DIP through-hole module on the PCB following the manufacturer’s recommended footprint and observe correct polarity for input and output terminals. Connect a suitable 18–75 V DC source to the input pins and verify the remote ON/OFF wiring if remote control is required. Provide proper grounding and ensure insulation clearances to maintain the specified 1.5 kVDC isolation. Verify output voltages under load conditions up to the rated 20 W total power and observe thermal conditions during operation.

Recommendations

Use within the specified input range (18–75 V DC) and do not exceed the rated output current (±0.835 A per rail). Implement adequate PCB creepage/clearance and filter components as needed for conducted and radiated noise suppression. For railway or transport installations, follow relevant industry standards and MEAN WELL application notes for mounting, cooling, and protection to ensure reliable operation.