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Five small green circuit boards with blue LED displays and adjustment screws

KEHIPI

KEHIPI 5pcs LM2596 Buck Converter 4-40V to 1.25-37V Power Adapter

SKU CH-54SD-YXR62

Five LM2596 step-down modules convert 4-40 V input to 1.25-37 V at up to 3 A with built-in voltmeter and protection

  • Adjustable 1.25–37V output from 4–40V input
  • Built-in voltmeter with ±0.1V accuracy and IN/OUT display
  • Three protection circuits: reverse, overheat, short-circuit
  • Permanent calibration mode for ±0.5V precision
  • 3A peak output with 150kHz switching efficiency

Five-Pack Adjustable Step-Down Modules

This pack supplies five identical LM2596 buck converters for bench work, hobby projects or small production runs. Each module accepts a 4-40V DC input and delivers a continuously adjustable 1.25-37V output. The built-in LED voltmeter shows either input or output voltage at the press of a button.

Sustained Load Behaviour

The regulator is rated for 2A continuous current and can reach 3A peak when adequate heatsinking is fitted. A 150kHz switching frequency keeps conversion losses low, but the supplier advises adding a heatsink once output current exceeds 2A or power goes above 15W. Input must remain at least 1.5V above the set output for stable regulation.

Protection Features And Daily Use

Reverse-connection, over-temperature and short-circuit safeguards protect both the module and connected loads. The display can be switched off with a long press to save power and remembers the last viewed voltage after power cycles. Calibration mode allows ±0.5V correction of the meter readings, stored permanently for each unit.

Highlights

  • Adjustable 1.25–37V output from 4–40V input
  • Built-in voltmeter with ±0.1V accuracy and IN/OUT display
  • Three protection circuits: reverse, overheat, short-circuit
  • Permanent calibration mode for ±0.5V precision
  • 3A peak output with 150kHz switching efficiency

Specifications

BrandDROK

Questions about this item

Does the module get hot if I run it at the full 3A output all day?

The supplier recommends staying at 2A for optimal thermals and advises adding a heatsink whenever the output current exceeds 2A or the output power goes above 15W.

What input source do I need to power these converters?

You must supply a DC source between 4V and 40V that is at least 1.5V higher than the desired output voltage.

Will the built-in voltmeter still show the output if I feed it from a 5V USB supply?

Yes, the voltmeter activates once the input exceeds 4V, so a 5V source will power the display and let you monitor both input and output voltages.

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