Electric Converter MEAN WELL SD-50B-12

The MEAN WELL SD-50B-12 is an electric converter delivering 50.4 W output in a compact enclosure (97 mm × 159 mm × 38 mm). It accepts a DC input range of 19–36 V and provides a regulated 12 V output with up to 4.2 A load current. The unit includes 1500 VAC input-to-output isolation, an internal EMI filter and is designed for reliable, low-ripple power conversion with fixed switching frequency operation.

Advantages

The converter offers a wide 2:1 input range, built-in protections against short circuit, overload and over-voltage, and a 1500 VAC I/O isolation barrier. It features a built-in EMI filter for reduced noise, low ripple output, a fixed 83 kHz switching frequency for predictable performance, and has passed 100% full-load burn-in testing. The design targets high reliability at a low cost and comes with a 2-year warranty.

Suitable for

• Industrial control systems requiring isolated 12 V rails
• Embedded and communication equipment with 19–36 V DC supplies
• Battery-powered or vehicle-mounted electronics using 24 V networks

Key specifications

• Model: MEAN WELL SD-50B-12 (MPN: SD-50B-12)
• Output power: 50.4 W
• Input voltage range: 19–36 V DC (2:1 wide input)
• Output: 12 V DC, 4.2 A
• Isolation: 1500 VAC input-output
• Switching frequency: fixed 83 kHz
• Dimensions: 97 × 159 × 38 mm
• Protections: short circuit, overload, over-voltage
• EMI filter: built-in, low ripple noise
• Test: 100% full-load burn-in
• Warranty: 2 years

How to use

Mount the SD-50B-12 in a well-ventilated location, ensuring adequate clearance for airflow. Connect the DC input (19–36 V) to the designated input terminals observing correct polarity. Connect the 12 V output to your load, not exceeding the 4.2 A rating. Verify grounding and isolation requirements per system design. Power up and monitor output voltage and load current during initial operation.

Usage recommendations

Use the converter within specified input and output limits, provide adequate cooling and follow safety guidelines for isolation and grounding. Avoid exceeding the rated output current and implement appropriate fusing on the input side to protect against sustained faults.