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

📏Compact 45x23x14mm size

🔋Input 3-40V, Output 1.5-35V adjustable

€ 26.57

Duties & taxes included

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Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Power your projects with precision and style — don’t get left in the voltage dust!

BUILT TO LAST - Thickened 36μm circuit boards with short circuit & over-temperature protection for reliable, long-term use.
COMPACT YET MIGHTY - Miniature 45x23x14mm footprint fits seamlessly into any DIY or professional project setup.
WIDE VOLTAGE RANGE - Supports input voltages from 3V to 40V and outputs from 1.5V to 35V, perfect for versatile applications.
READY FOR SIX PROJECTS - Includes 6 modules in one pack—scale your innovations without delay or extra orders.
PRECISION POWER CONTROL - High-Q inductors & solid capacitors ensure ultra-stable voltage output with ±0.5% load regulation.

This 6-pack LM2596 DC-DC buck converter set delivers high-efficiency step-down voltage regulation with up to 3A output current. Featuring thickened circuit boards, advanced solid-state capacitors, and LED output indicators, it offers precise voltage adjustment from 1.5V to 35V with a wide input range of 3V to 40V. Compact and robust, these modules include built-in protections and are ideal for electronics enthusiasts and professionals seeking reliable, scalable power solutions.

Specifications

ASIN	B076H3XHXP
Best Sellers Rank	#33,881 in Electronics ( See Top 100 in Electronics ) #516 in International Power Adapters
Brand Name	Valefod
Current Rating	2.5 Amps, 3 Amps
Customer Reviews	4.5 4.5 out of 5 stars (1,139)
Item Dimensions D x W x H	23D x 45W x 14H millimeters
Item Weight	14 Grams
Manufacturer	Valefod
Maximum Frequency	65 KHz
Minimum Frequency	50 Hz
Model	VA-HW-411
Number of Items	6
Part Number	VA-139-52
Power Source	DC power supply
UPC	889328049201
Unit Count	6 Count

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