Power adapter/inverter MEAN WELL RDDW20F-12 — 20 W, 12 V, 0.835 A, RoHS

MEAN WELL RDDW20F-12 is a compact DC-DC railway dual output converter designed for low-power embedded and industrial applications. It accepts a wide input range of 9–36 VDC and provides symmetrical outputs of ±12 VDC with a maximum current of ±0.835 A per rail. The module offers 1.5 kVDC input-to-output isolation, comes in a DIP through‑hole package, and includes a remote ON/OFF control. The device is RoHS certified and supplied in bulk packs suitable for production use.

Advantages

The RDDW20F-12 combines a wide input voltage range with dual ±12 V outputs to support systems that require both positive and negative rails. Its 1.5 kVDC I/O isolation enhances safety and reduces interference in rail and industrial environments. The DIP through‑hole package simplifies PCB mounting in legacy and new designs, while the remote ON/OFF feature provides flexible control for system power management. Small size and low weight make it suitable for space‑constrained applications.

Suitable for

• Embedded control boards requiring ±12 V rails
• Railway and transportation electronics with isolation requirements
• Low‑power industrial sensors and signal conditioners
• Prototyping and small series production where DIP mounting is preferred

Key specifications

• Manufacturer: MEAN WELL
• Model: RDDW20F-12
• Output power: 20 W
• Input voltage: 9–36 VDC
• Output: ±12 VDC, ±0.835 A
• Isolation: 1.5 kVDC I/O
• Package: DIP through‑hole
• Control: Remote ON/OFF
• Compliance: RoHS
• Dimensions/weight: 50.8 mm depth, approx. 35 g (manufacturer data)

How to use

Connect the input supply (9–36 VDC) to the input pins observing polarity. Route the ±12 V outputs to the load ensuring the combined load does not exceed 20 W and that each rail current stays within ±0.835 A. Use the remote ON/OFF pin according to the manufacturer’s logic level specification to enable or disable the converter. Maintain proper creepage and clearance on the PCB to preserve the 1.5 kV isolation rating and follow standard grounding and decoupling practices.

Recommendations

For reliable operation, operate the converter within the specified input range and keep ambient temperature and ventilation within the manufacturer’s limits; when used in railway or industrial environments, verify system-level EMC and isolation requirements during integration.