improved INA3221 breakout-3 power supplies-0.1Ohm

Name: improved INA3221 breakout-3 power supplies-0.1Ohm
SKU: 18854
Price: 10.00 USD
Availability: OutOfStock
Rating: 5.00 (1 reviews)

(1 Review)

improved INA3221 3 channel voltage and current sensor breakout board - allows 3 separate power supplies - 0.1 Ohm sense resistors

Designed by yesyes Electronics in United Kingdom

improved INA3221 breakout-3 power supplies-0.1Ohm 1

improved INA3221 breakout-3 power supplies-0.1Ohm 2

improved INA3221 breakout-3 power supplies-0.1Ohm 3

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2019-12-13T15:35:44.421Z-INA3221-R100_front1.png

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$10.00

Out of Stock

Sold out since Sep 27, 2025

improved INA3221 3 channel voltage and current sensor breakout board - allows 3 separate power supplies - 0.1 Ohm sense resistors

OK, OK, OK, I've had 30 more of these manufactured. But after that they will not be available any more. Then please order the INA3221-RNONE model with additional R100 resistors. See below. If you do…

What is it?

improved INA3221 3 channel voltage and current sensor breakout board
allows 3 separate power supplies
0.1 Ohm sense resistors

Specifications

Size: 30 x 26mm
Supply Voltage: 2.7 - 5.5V
Supply Current: 350 µA typical (INA3221)
Sense Voltage: 0 - 26V, 8mV resolution
Sense Current: ±1.6A, 0.4mA resolution
Sense Resistors: 0.1 Ohm (R100), 1% tolerance, 2Watt
I2C Addresses: 4 (0x40 (default) - 0x43) selectable by solder jumper or A0 pin, see INA3221 datasheet

See documentation link below for more details on this board.

Why did you make it?

The commonly available INA3221 breakout board has a design flaw where all 3 channels use the same power supply. I wanted to fix that and make an improved version available.

What makes it special?

My version implements the example circuit from the INA3221 datasheet and therefore allows 3 different power supplies; one per channel.

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Quantity	Price
1	$10.00
2-4	$9.00
5+	$8.00

Review Breakdown

Average Ratings

Product: (5.00)

Documentation: (5.00)

Shipping: (5.00)

Communication: (5.00)

Federico | Sept. 27, 2025

Awesome

They’re perfect! The compact INA3221 breakout boards save space and work great.
Super fast shipping — it was a pleasure! I’ve already ordered more for other projects 😎

$10.00