Valefod DC-DC 5A Buck Converter 1.25–36V LED

Valefod’s 2-pack DC-DC 5A buck converters are compact, adjustable step-down voltage modules with LED readout designed to convert 4–38V input down to 1.25–36V output at up to 5A per module.

These step-down regulator modules are built on thickened 36µ double-sided PCBs with high-Q inductors and solid-state capacitors to reduce high-frequency noise. Each module includes an integrated LED voltage display and a blue potentiometer for precise, continuous adjustment. The pair offers a space-efficient solution for bench work, DIY electronics, battery-powered projects, and prototype power management where a reliable adjustable DC source is needed.

How accurate and stable is the output voltage?

The converter uses quality components and an adjustable potentiometer for fine control of output voltage. While it provides stable regulation for many electronic tasks, end-users should verify with a multimeter for critical applications and allow the module to warm up under load before final tuning.

• Continuous output range: 1.25V to 36V
• Input range: 4V to 38V (must be ≥1.5V above set output)
• Maximum continuous output current: 5A (observe thermal limits)
• LED display for live voltage monitoring

What are the physical dimensions and mounting considerations?

Each module measures approximately 62 × 38 × 14 mm including the potentiometer, making them easy to fit into enclosures or prototype rigs. Leave clearance around the inductor and potentiometer for airflow and safe access; hard mounting onto metal surfaces may require insulating standoffs to avoid shorts.

• Compact footprint: 62mm by 38mm by 14mm
• Potentiometer protrudes — allow top clearance for adjustment
• Double-sided thick PCB for mechanical durability
• Two modules included for parallel projects or redundancy

How do I set the voltage and connect the module safely?

Connect the input to a suitable DC source within 4–38V, then connect the load to the output. Adjust voltage with a small screwdriver on the blue trim potentiometer while monitoring output with a multimeter; clockwise raises voltage, counterclockwise lowers it. Note the factory setting may be high, so multiple counter-rotations are usually required to reach lower voltages.

• Use a multimeter to verify output while adjusting
• Clockwise turns increase voltage; counterclockwise decreases
• Factory default is a higher voltage — expect ~7–15 counter-rotations to reduce
• Observe input ≥ output + 1.5V; not a boost converter

What thermal and current limitations should I keep in mind?

The module supports up to 5A but thermal performance depends on load, input-output differential, and airflow. For sustained high-current use, mount with ventilation or add a heatsink; monitor temperature during initial tests to ensure reliable operation.

• Maximum rated current: 5A (subject to cooling and input/output conditions)
• Higher input-to-output drop increases heat generation
• Recommend forced airflow or heatsink for continuous heavy loads
• Use appropriately rated wiring and connectors for safety

Who is this for: Hobbyists, electronics students, makers, and technicians who need compact, adjustable DC power sources for prototyping, battery regulation, LED drivers, motor test benches, or small lab setups. Because these modules require user verification and may get warm under load, they suit users comfortable with basic multimeter checks and safe wiring practices.