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Green rectangular buck regulator module with screw terminals and adjustment potentiometers, 60 by 53 by 27 mm

JacobsParts Inc.

JacobsParts Inc. 300W Buck Regulator 6-40V to 1.25-36V 20A Power Strip

SKU CH-Q2VV-6V819

Step-down voltage regulator converts 6–40 V DC input to adjustable 1.25–36 V DC output at up to 300 W peak with 96 % efficiency

  • Supply voltage6-40 V DC
  • Product typeStep Down (Buck) Voltage Regulator
  • Stable voltage and current control for diverse projects
  • Wide 6-40V input to 1.25-36V adjustable output
  • High 96% conversion efficiency reduces energy waste
  • Compact 60x53x27mm design fits tight spaces
  • 300W peak power handles demanding loads

Compact Step-Down Regulator for Custom Projects

This synchronous buck module converts a 6-40V DC input into an adjustable 1.25-36V DC output for hobbyist and prototype work. It suits builders who need a small, efficient converter for battery charging, LED driving or micro-controller supply rails.

Bare-Board Construction with Screw Terminals

The 60x53x27mm PCB uses an LM25116 controller running at 150KHz and includes short-circuit protection in a non-isolated topology. Solder pads or screw terminals accept input and output wiring, but the board has no enclosure, so mechanical mounting and strain relief must be provided by the installer.

Headroom and Thermal Limits Define Usable Power

A minimum 3V dropout between input and output is mandatory, restricting low-voltage conversions at the upper current range. Peak rating reaches 300W or 20A, yet sustained load is capped at 15A, and a fan becomes necessary once the module temperature exceeds 65°C. Reverse polarity on either side can damage the regulator instantly.

How it compares

Measured against everything we stock in Multi-Outlet Power Strips, at today’s prices. Recalculated every night.

Price $7.99
Cheaper than about 77% of the 384 comparable items (median $23.99).

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Specifications

Product
Product typeStep Down (Buck) Voltage Regulator
Power
Supply voltage6-40 V DC

Questions about this item

What input-voltage range does the 6-40V buck regulator accept and what is the minimum dropout?

The module accepts 6-40V DC input and requires at least 3V more on the input than the set output voltage.

What are the physical dimensions and mounting footprint of the 60x53x27mm unit?

The board measures 60 mm long, 53 mm wide and 27 mm tall with no mounting holes specified in the data.

How do you set the output voltage and current limit on the LM25116 module and what common mistake should be avoided?

Adjust the two onboard potentiometers for voltage and current; never apply reverse polarity to input or output or the regulator will be damaged.

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