# Voltage and current monitor sensor, 3 channels, INA3221, I2C, SMBUS, 2.7-5.5V

> INA3221 sensor module with 3 independent channels for voltage and current monitoring, compatible with Arduino and other 3V or 5V boards. Communicates via I2C/SMBUS, operates at 2.7-5.5V, typical current 350 µA. Voltage accuracy ±80 µV, current accuracy 0.25%, measured current 1.5A per channel. Features four programmable I2C addresses, configurable averaging and programmable alert outputs.

- Page: https://sigmanortec.ro/en/voltage-and-current-monitor-sensor-3-channels-ina3221-i2c-smbus-27-55v
- Price: 15.25 RON
- Availability: In stock; 1-2 zile
- Reference: 9707 · EAN: 5942025356999
- Category: Mechatronics and IoT > Sensors and Modules > Voltage and Current Sensors
- Specifications: Input Voltage: 2.7 - 5.5 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.
- Package (shipping data): 0.007 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 01:33 (Europe/Bucharest)

## Description

3-channel module for precise voltage and current monitoring in electronic systems, ideal for Arduino and other 3V or 5V boards. Communicates via I2C SMBUS, operates at 2.7-5.5V with low consumption, measures supply voltage and shunt drop for current estimation, includes selectable I2C addresses and programmable alerts for overshoots.
The INA3221 Voltage and Current Monitor Sensor, compatible with Arduino and other 3V and 5V development boards, is an advanced three-channel module designed for precise monitoring of supply voltages and current drawn by components or devices in an electronic system. It measures both shunt voltage drops and system supply voltages and provides accurate data on them.
With an operating voltage range of 2.7V to 5.5V, the sensor can be conveniently powered from variable voltage sources. The device maintains high energy efficiency, consuming only 350 µA of current during operation.
The INA3221 features precision characteristics, with minimal offsets and low gain errors, ensuring reliable measurements. In addition, it offers configurable options for averaging measured data, allowing the user to tailor the sensor performance to specific application requirements.
With four programmable I2C addresses and alert and warning functions, the INA3221 allows for the detection and management of errors or out-of-range conditions, facilitating efficient system monitoring and control.
Specifications:
Operating Voltage: 2.7 V - 5.5 V
Number of Channels: 3 independent channels
Interface: I2C and SMBUS
Operating Current: 350 µA (typ.)
Voltage Accuracy: ±80 µV (max)
Current Accuracy: 0.25% (max)
Measured current: 1.5A per channel
Configurable Averaging: Configurable averaging options
Programmable I2C Addresses: Features four programmable addresses
Programmable Alert and Warning Outputs: Detect conditions outside of programmed range
Instructions for Use:
Connecting to Microcontroller: Connect the INA3221 sensor to a microcontroller using the I2C or SMBUS interface.