DC-DC Step Down Module 12-75V to 2.5-50V 400W Adjustable

$47.77 $57.30

Adjustable DC-DC Step Down Converter Module — 400W High Power

Take precise control of your voltage regulation with this high-performance Adjustable DC-DC Step Down Module. Supporting a wide input range of DC 12V–75V and an adjustable output of DC 2.5V–50V, this 400W buck converter is built for demanding electronics projects, automotive systems, solar installations, and more. Made in Mainland China.

Key Features

Wide Voltage Range: Input DC 12V–75V with precision-adjustable output DC 2.5V–50V — handles virtually any step-down application.
Easy Manual Adjustment: Built-in screwdriver potentiometers let you fine-tune output voltage quickly without extra tools. Rotate counter-clockwise to increase voltage, clockwise to decrease.
Multi-Layer Protection: Includes short circuit, over-current, over-temperature, over-power, over-voltage, and anti-backflow charging protection for safe, reliable operation.
Efficient Heat Dissipation: Integrated fan with temperature control (activates at ~45°C at 12V) and up to 95% typical conversion efficiency keep the module stable under heavy loads.
Broad Applications: Ideal for motors, audio equipment, LED displays, monitors, fans, air conditioners, solar/photovoltaic systems, and more.

Full Specifications

Input Voltage	DC 12V – 75V
Output Voltage	DC 2.5V – 50V (adjustable, step-down only)
Output Current	15A continuous (25A max — requires larger fuse above 15A)
Max Output Power	400W
Operating Frequency	150 kHz
Conversion Efficiency	Up to 95% (typical)
Isolation	Non-isolated
Min. Differential Voltage	3V (increases with higher input voltage)
Built-in Fan	Yes — temperature-controlled, starts at ~45°C
Material	Aluminum alloy & PCB
Dimensions	Approx. 85 × 58 × 38 mm (3.4 × 2.3 × 1.5 in)
Weight	~133 g
Origin	Made in Mainland China

Wiring Guide

IN+ — Input positive
IN− — Input ground
OUT+ — Output positive
OUT− — Output ground

⚠ Note: This module is a step-down (buck) converter only — it cannot boost voltage. It does not have a constant-current function and is not suitable for direct large-battery charging or high-power inductive loads. If reverse-polarity protection is needed, add a series diode at the input. If module temperature exceeds 75°C during prolonged high-current use, add additional heat dissipation or reduce load.

What's in the Box

1 × Adjustable DC-DC Step Down Module

Frequently Asked Questions

Q: What is the maximum output power of this DC-DC step down module?

A: This adjustable step down converter supports a maximum output power of 400W. The continuous output current is 15A, with a peak of 25A — though exceeding 15A requires upgrading to a larger safety fuse to maintain safe operation.

Q: Can this module boost voltage as well as step it down?

A: No — this is a buck (step-down) converter only. The output voltage must always be lower than the input voltage by at least 3V (minimum differential voltage). It cannot be used to boost voltage above the input level.

Q: Does the step down module have built-in protection features?

A: Yes. The module includes multiple built-in protections: short circuit, over-current, over-temperature, over-power, over-voltage, and charging anti-backflow protection — making it a reliable and safe choice for a wide variety of DC power regulation projects.

Q: What applications is this DC-DC converter suitable for?

A: This high-power adjustable step down module is well-suited for motors, audio amplifiers, LED car displays, monitors, air conditioners, fans, and solar or photovoltaic systems — anywhere you need precise, stable DC voltage regulation from a higher source voltage.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.