DC-DC Converters
Runs 12 V equipment from a 24 V vehicle or vessel. Isolated models add galvanic isolation, which breaks the ground loop causing alternator whine on the audio.
Samlex — DC-DC Converters
7 models in this range from Samlex.
Step-Down DC-DC Converter — 24 V to 13.8 V / 8 A
Runs 12 V radio equipment from a 24 V vehicle system — the standard problem on trucks, buses, and commercial vessels. The separate 100 mA memory-backup output keeps radio presets alive when the main output is switched off.
Specifications
Key Features
- Dedicated memory-backup output preserves radio presets
- Runs 12 V radios from 24 V trucks, buses, and vessels
- High switch-mode efficiency, little waste heat
- Short-circuit, reverse-polarity, and overvoltage protection
- Compact enough to mount behind a dashboard
Step-Down DC-DC Converter — 24 V to 13.8 V / 20 A
The higher-current step-down converter, at 20 A. Enough headroom to run a 50 W mobile transceiver at full transmit from a 24 V vehicle system rather than a handheld-class load.
Specifications
Key Features
- 20 A handles a 50 W mobile transceiver at full transmit
- Tight ±0.1 V output regulation
- Compact and light for its current rating
- Current-limit circuitry protects the converter
- Short-circuit, reverse-polarity, and overvoltage protection
Isolated DC-DC Converter — 100 W, 12.5 V / 8 A
Galvanic isolation between input and output, which breaks the ground loop that causes alternator whine and hum on vehicle and marine installations. The fix when a non-isolated converter leaves noise on the audio.
Specifications
Key Features
- Galvanic isolation eliminates ground-loop noise
- Foldback current limiting protects under overload
- Compact housing for tight installations
- Protected against short circuit, overheating, overvoltage, and reverse polarity
Isolated DC-DC Converter — 200 W, 12.5 V / 16 A
The 200 W isolated converter at 12.5 V, delivering 16 A. Twice the capacity of the IDC-100 for the same isolation benefit, where a single radio is not the only load on the output.
Specifications
Key Features
- 16 A of isolated 12 V supply from a 24 V system
- Galvanic isolation removes ground-loop interference
- Foldback current limiting
- Compact housing
- Short-circuit, overheat, overvoltage, and reverse-polarity protected
Isolated DC-DC Converter — 200 W, 24.5 V / 8 A
The 24 V output member of the 200 W family. Used where isolation is needed but the equipment runs at 24 V — providing a clean, separately grounded 24 V rail rather than stepping down to 12 V.
Specifications
Key Features
- Isolated 24 V output rather than a step-down to 12 V
- Breaks ground loops between vehicle and equipment
- Foldback current limiting
- Compact housing
- Short-circuit, overheat, overvoltage, and reverse-polarity protected
Isolated DC-DC Converter — 360 W, 12.5 V / 30 A
The largest isolated converter in the range at 360 W, giving 30 A of clean 12 V from a 24 V system. Sized for a full vehicle installation — radio, amplifier, and ancillaries together.
Specifications
Key Features
- 30 A isolated output — a whole vehicle installation on one converter
- Galvanic isolation across the full 360 W
- Foldback current limiting
- Protected against short circuit, overheat, overvoltage, reverse polarity
Isolated DC-DC Converter — 360 W, 60–120 V Input
Same 360 W and 30 A output as the B model, but fed from a 60–120 V DC input. That suits traction and industrial DC systems — rail vehicles and telecom plant — where the supply rail is far above vehicle voltage.
Specifications
Key Features
- Accepts 60–120 V DC — rail traction and industrial DC plant
- 30 A of isolated, regulated 12 V output
- Galvanic isolation from a high-voltage DC rail
- Foldback current limiting
- Short-circuit, overheat, overvoltage, reverse-polarity protected
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