Samlex 100W Fully Isolated DC-DC Converter - 8A - 20-35V Input - 12.5V Output

The Samlex 100W Fully Isolated DC-DC Converter (model IDC-100B-12) is an essential power management tool for serious vehicle builders, off-road enthusiasts, and mechanics working with multi-voltage electrical systems. Whether you're upgrading a classic truck with modern electronics, powering auxiliary lighting and communication systems in a modified 4x4, or managing power distribution in a custom build, this isolated converter solves one of the most common integration challenges: safely stepping down higher vehicle voltages to a stable 12.5V output without ground loop issues.

Clean, regulated power is critical when mixing OEM and aftermarket components that demand precise voltage stability. Samlex's full isolation design is the key difference between this converter and basic buck regulators. The internal transformer-based topology completely isolates the output circuit from the input, eliminating ground loops that can introduce noise into sensitive electronics like GPS units, radios, and engine control modules.

With a 20–35V input range, it accommodates 24V systems, high-voltage lithium battery banks, and alternator output spikes without degradation. The 100W capacity at 8A maximum output delivers reliable power to multiple accessories simultaneously—enough for a CB radio, dual LED light bars, or integrated auxiliary circuits. Compact dimensions (4 × 2 × 6 inches) and 1.2-pound weight make it ideal for tight engine bays, custom enclosures, or under-seat installations.