Samlex 24V to 12V 5A Non-Isolated DC-DC Converter

The Samlex SDC-5 is a compact step-down converter for equipment that needs regulated lower-voltage DC power from a nominal 24V electrical system. It is a non-isolated design, so the input and output share a common negative and are intended for negative-ground installations. The switch-mode circuit provides efficient conversion for radios, lighting, audio equipment, and other compatible mobile or marine accessories. Its small enclosure makes it practical where space is limited and a larger converter would be difficult to mount.

The converter regulates the output near the normal charging voltage of a 12V system rather than simply reducing the input with a resistor or passive device. Cycle-by-cycle current limiting helps control overload conditions, while short-circuit and overvoltage protection provide additional electrical safeguards. Reverse-polarity protection on the input side helps protect the converter against one of the most common wiring mistakes during installation. Because the unit is non-isolated, it should not be used where galvanic separation between the two DC systems is required.

The SDC-5 measures about 3.5 x 2.75 x 1.75 in and weighs roughly 0.4 lb, allowing it to fit near the equipment it powers. Samlex allows several mounting orientations, but the installation area should still be cool, dry, protected, and ventilated. Quick-connect flat terminals simplify the electrical connection when properly sized mating terminals are used. The converter carries a two-year limited warranty.

• Regulated step-down conversion for negative-ground systems
• Compact switch-mode design fits tight equipment spaces
• Current limiting and short-circuit protection support reliable operation
• Reverse-polarity protection helps guard against wiring errors

Mount the converter close enough to the load to avoid unnecessary voltage drop while keeping it protected from direct water exposure and heat sources. Size the input and output conductors for the actual current and install upstream protection appropriate to the supply circuit. For other voltage-conversion options, browse more DC-DC Converters & Power Supplies.