MEAN WELL SD-100D-24 100.8W DC-DC Converter 24V 4.2A

Delivering a full 100.8 watts from a compact chassis-mount module, the SD-100D-24 steps down 48 VDC input to a tightly regulated 24 VDC output at up to 4.2 A. Its wide 19.2–72 VDC input range makes it ideal for battery-powered, automotive, and industrial DC bus applications where voltage fluctuations are common.

Overview

The MEAN WELL SD-100D-24 is a high-efficiency DC-DC converter engineered for demanding environments. With free-air convection cooling, it operates silently across a -20°C to +60°C temperature range, ensuring reliable performance in enclosures or open frames. Screw terminal connections simplify installation, while built-in protections against short circuit, overload, over voltage, and input reverse polarity safeguard both the converter and connected loads.

What stands out

• Wide 4:1 input range (19.2–72 VDC) for flexible system integration
• High efficiency up to 85%, reducing heat and energy waste
• Adjustable output voltage (22–28 VDC) for fine-tuning
• Robust isolation: 1500 VDC between input and output
• Compact chassis-mount design with screw terminals
• Certified to UL60950-1 and TUV EN60950-1, CE marked

Technical details

• Input voltage: 19.2–72 VDC (nominal 48 VDC)
• Output voltage: 24 VDC (adjustable 22–28 VDC)
• Rated output current: 4.2 A
• Rated output power: 100.8 W
• Ripple & noise: 150 mVp-p max
• Line regulation: ±0.5%
• Load regulation: ±1.0%
• Efficiency: 85%
• Isolation voltage: 1500 VDC (input to output)
• Protections: short circuit, overload, over voltage, input reverse polarity
• Operating temperature: -20°C to +60°C
• Cooling: free air convection
• MTBF: >200K hrs (MIL-HDBK-217F, 25°C)
• Certifications: UL60950-1, TUV EN60950-1, CE

Our verdict

The SD-100D-24 is a workhorse DC-DC converter that combines ruggedness with precise regulation. Its wide input range and comprehensive protection features make it a top choice for industrial and mobile power systems.