MEAN WELL SD-15B-12 DC-DC Converter, 15W, 12V 1.25A, PCB Mount

Industrial control panels and automation systems often need a stable 12V DC rail from a 24V DC bus. The MEAN WELL SD-15B-12 is a compact DC-DC converter that steps down a 19.2–36V DC input to a regulated 12V DC output at up to 1.25A, delivering 15W of power. Its PCB mount design with free air convection cooling makes it easy to integrate into space-constrained enclosures, while built-in protections against short circuit, overload, and over voltage ensure reliable operation in demanding environments.

Key specifications

• Input voltage range: 19.2–36V DC
• Output voltage: 12V DC
• Output current: 1.25A
• Rated power: 15W
• Isolation voltage: 1500V DC
• Efficiency: 74% typical
• Operating temperature: -20 to +60°C
• Storage temperature: -40 to +85°C
• Mounting type: PCB mount
• Compliance: UL60950-1, TUV EN60950-1, CE

Why choose it

The SD-15B-12 offers a cost-effective solution for converting 24V DC industrial power to a clean 12V DC output. Its wide input range accommodates fluctuations in the supply voltage, and the 1500V DC isolation protects sensitive circuitry. With a compact footprint and no need for forced cooling, it simplifies PCB layout and reduces system complexity.

Ideal use cases

• Industrial automation and control systems
• Telecommunication equipment
• Instrumentation and sensors
• Battery-powered devices
• Distributed power architectures

Good to know

The converter is designed for PCB mounting and features free air convection cooling, so no additional heatsink is required under normal conditions. It meets international safety standards and is suitable for a wide range of industrial applications. Always verify input polarity and ensure adequate clearance for ventilation.