MEAN WELL SD-15B-5 15W DC-DC Converter, 19.2-36V Input, 5V 3A Output, Chassis Mount

Delivering 15 watts of regulated DC power from a wide 19.2–36 VDC input, the SD-15B-5 steps down to a stable 5 VDC at 3 A with 74% efficiency and 100 mVp-p ripple. Ideal for industrial control panels, vehicle systems, and battery-powered equipment requiring isolated low-voltage rails.

Overview

The MEAN WELL SD-15B-5 is a compact, chassis-mount DC-DC converter from the SD-15 series. It accepts a 2:1 input range (19.2–36 VDC) and provides a single, fully regulated 5 VDC output rated at 3 A. Built-in protections include short circuit, overload, and over voltage, with 1500 VDC input-to-output isolation for safety. Convection cooling eliminates the need for fans, ensuring silent, maintenance-free operation.

What stands out

• Wide 2:1 DC input range (19.2–36 V) suits 24 V battery and industrial bus voltages
• High reliability with full protections: short circuit, overload, over voltage
• 1500 VDC isolation between input and output for system safety
• Compact chassis-mount design with screw terminals for secure wiring
• Free air convection cooling – no fan noise or moving parts
• Excellent regulation: line and load regulation both ±0.5%

Technical details

• Output power: 15 W
• Output voltage: 5 VDC
• Output current: 3 A
• Input voltage: 19.2–36 VDC
• Efficiency: 74%
• Ripple & noise: 100 mVp-p
• Isolation: 1500 VDC
• Operating temperature: -20 to +60 °C
• Mounting: chassis mount with screw terminals
• Cooling: free air convection

Our verdict

The SD-15B-5 is a rugged, no-nonsense DC-DC converter for engineers who need dependable 5 V power from 24 V systems. Its wide input tolerance, isolation, and full protection suite make it a safe choice for demanding industrial environments.