Is the output a percentage of the input, or a constant? If I have 20 v in, adjust to 5v out; input goes to 30v will output be 5v or 7.5v?

Output voltage is set by the variable resistor and stays independent of the input voltage ( as long as the input voltage stays a few volts above the output voltage). If the input voltage dips, the output voltage will also dip.

What are the dimensions of this voltage regulator?

43 x 21 x 12 mm using caliper on actual product.

Is there any datasheet / CAD model that shows mounting hole dimensions and location of the mounting holes?

None I know of just trace it out with standoff mounted in your project case and use dremel dril bit kit according to thread hole size. Good-luck.

Does anyone have the dimensions of mounting holes, and voltage input/output locations?

Mounting holes will work with standoff kits on amazon nylon or etal with screws . The pcb in maked vcc in- + and output - & +.

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6 Pack LM2596 DC to DC High Efficiency Voltage Regulator 3.0-40V to 1.5-35V Buck Converter DIY Power Supply Step Down Module

Product ID: 309245162

Details

Brand
Valefod
Current rating
2.5 Amps 3
Item weight
14 Grams
Power source
DC power
Product dimensions
23D x 45W x

⚡3A max output current

📏Adjustable 1.5V-35V output

🔧Compact 45x23x14mm size

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Description

🔋 Power your innovation with precision and style!

BUILT TO LAST - Thickened 36μm circuit boards with short circuit & over-temperature protection for reliable, long-term use.
WIDE INPUT RANGE - Supports 3V to 40V input, perfect for versatile DIY and professional electronics setups.
COMPACT EFFICIENT - Miniature 45x23x14mm footprint with 92% max efficiency fits seamlessly into any workspace.
PRECISION POWER CONTROL - High-Q inductors & solid-state capacitors ensure ultra-clean voltage output for your critical projects.
READY FOR MULTI PROJECT USE - 6-pack bundle lets you power multiple devices or prototypes simultaneously—stay ahead of the curve.

This 6-pack LM2596 DC-DC buck converter set offers adjustable 1.5V-35V output at up to 3A with 92% efficiency, housed in compact, durable modules featuring advanced solid-state capacitors and protective circuitry—ideal for professional-grade DIY electronics and power regulation.

Specifications

ASIN	B076H3XHXP
Best Sellers Rank	#15,182 in Electronics ( See Top 100 in Electronics ) #278 in International Power Adapters
Brand	Valefod
Brand Name	Valefod
Current Rating	2.5 Amps, 3 Amps
Current rating	2.5 Amps , 3 Amps
Customer Reviews	4.5 out of 5 stars 1,118 Reviews
Item Dimensions D x W x H	23D x 45W x 14H millimeters
Item Weight	14 Grams
Item weight	14 Grams
Manufacturer	Valefod
Maximum Frequency	65 KHz
Minimum Frequency	50 Hz
Model	VA-HW-411
Part Number	VA-139-52
Power Source	DC power supply
Power source	DC power supply
Product dimensions	23D x 45W x 14H millimeters
UPC	889328049201

Reviews

A**R

Used as a DC input Power supply regulator

23.02.2024

K**L

Awesome

30.09.2025

A**A

Nice little adjustable voltage regulator

21.03.2023

T**T

Cheap and working

8.05.2024

T**T

Worked good.

2.01.2023

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