XH-M404 DC-DC Buck Module XL4016E1 High Power DC Digital(0.36″ RED) Regulator Board 8A(Max) with Voltage Regulator 250W(Max Power)

SKU: FA2019-14
Model

XH-M401 (B-Series)
Voltage Regulator Chip

XL4016E1
Input Voltage

DC 4V – 40V
Output Voltage

DC 1.25V – 36V (Adjustable)
Maximum Output Current

8A (Peak)
Continuous Output Current

5A (Recommended for long-term use)
Maximum Power

200W
Conversion Efficiency

94% (Maximum)
Switching Frequency

180kHz
Dimensions

61mm x 41mm x 27mm
Weight

Approx. 48g
The XH-M404 DC-DC Digital Buck Converter Module is a high-power, high-efficiency step-down voltage regulator designed for precision power management. Featuring an integrated 0.36″ Red LED Digital Display, this module allows for real-time monitoring of output voltage without the need for an external multimeter.
Driven by the robust XL4016E1 switching regulator chip, the XH-M404 can deliver up to 8A of peak current, making it an ideal solution for DIY adjustable power supplies, high-power LED drivers, battery charging stations, and industrial control systems. Its compact design includes an onboard multi-turn potentiometer for ultra-fine voltage adjustments and an integrated heatsink for stable, long-term performance.
Key Features
  • Integrated Digital Voltmeter: Features a bright 0.36-inch Red LED display that shows the output voltage in real-time with high accuracy.
  • High Power Efficiency: Utilizes Class D switching technology to achieve up to 94% conversion efficiency, minimizing heat waste.
  • Precision Voltage Control: Equipped with a high-accuracy multi-turn potentiometer, allowing for granular adjustments to the 0.1V level.
  • Advanced Protection Suite: Includes built-in over-temperature protection, over-current protection, and short-circuit protection to safeguard connected electronics.
  • Industrial Build Quality: Features high-frequency, low-resistance electrolytic capacitors and a high-inductance copper coil for a clean, low-ripple power output.
  • Ready for Mounting: The PCB includes four pre-drilled 3mm mounting holes for easy installation into project boxes or control panels.
Usage Guidelines
  1. Wiring: Connect the DC input (4V-40V) to the IN+ and IN- terminals. Connect the load to the OUT+ and OUT- terminals.
  2. Voltage Calibration: This is a Buck (Step-Down) converter. Ensure the input voltage is at least 2V higher than your desired output.
  3. Adjustment: Turn the blue multi-turn potentiometer with a small screwdriver. Clockwise increases the voltage; counter-clockwise decreases it.
  4. Heat Management: If using the module at more than 5A or 100W continuously, we recommend adding a small cooling fan to ensure the heatsinks stay within safe operating temperatures.
  5. Initial Power-On: Observe the digital display immediately upon powering to ensure the output is at the safe level for your specific device.
Q: Can this module be used to increase voltage?

No. This is a Step-Down (Buck) converter. The output voltage will always be lower than the input voltage.

Q: How accurate is the onboard digital display?

The display is accurate to ±0.1V. If you notice a slight discrepancy, you can often calibrate the display using the small trim-potentiometer located near the LED tube.

Q: Is it safe for 24/7 industrial use?

Yes. Business purchasers frequently use the XH-M404 for powering sensors, PLCs, and small motors in industrial environments. However, for 24/7 operation at high loads (above 5A), active fan cooling is highly recommended to prolong component life.

Q: Can I use this for battery charging?

Yes, but it is advised to add a “blocking diode” to the output to prevent the battery from back-feeding into the module when the input power is turned off.

Q: Why does the display not change when I turn the potentiometer?

Because it is a multi-turn potentiometer, it may require 10 to 20 full rotations before you see the voltage begin to move from the factory setting. Also, ensure your input voltage is higher than your target output.

Q: Does it have reverse polarity protection?

No. Connecting the input wires in reverse will damage the XL4016 chip. Please verify your positive (+) and negative (-) connections before applying power.

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