# I2C Expansion Module, 10 channels, 3.3-5V

> Compact I2C hub that distributes the SDA and SCL lines in parallel to 10 ports with 2.54 mm pins. Operates at 3.3-5V DC and allows simultaneous connection of multiple I2C sensors or modules to a single microcontroller (Arduino, ESP32, ESP8266, Raspberry Pi Pico). Does not select channels or change I2C addresses, it only distributes the signal. Dimensions 38 x 20 mm. Ref. 88167.

- Page: https://sigmanortec.ro/en/i2c-expansion-module-10-channels-33-5v
- Price: 7.19 RON
- Availability: Out of stock
- Reference: 88167 · EAN: 5941733911896
- Category: Mechatronics and IoT > Sensors and Modules > Expansion Module
- Specifications: Input Voltage: 3.3 - 5 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.; Communication interface: I2C; Number of channels: 10
- 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 03:39 (Europe/Bucharest)

## Description

Compact hub for extending the I2C bus, allows quick and neat connection of up to 10 sensors or modules to the same microcontroller. It distributes the SDA and SCL lines in parallel to 10 ports with 2.54 mm pins, operates at 3.3-5V, and is ideal for prototyping and testing with Arduino, ESP32, ESP8266, or Raspberry Pi Pico.
The I2C expansion module is a practical solution for projects where it is necessary to connect multiple I2C sensors or actuators to a single microcontroller. It functions as a compact hub that distributes the SDA and SCL lines to 10 output channels (different I2C addresses), significantly simplifying wiring and connection organization. It is ideal for rapid development, testing, and prototyping, especially in applications based on Arduino, ESP32, ESP8266, Raspberry Pi Pico, or other boards compatible with the I2C bus.
The module allows simultaneous connection of up to 10 I2C devices through standard 2.54 mm pins, without the need for direct soldering or using an additional breadboard. The operating voltage from 3.3 to 5V makes it suitable for a wide range of embedded systems and electronic projects. Due to its compact format and simple connections, this module is very useful in automation, monitoring, robotics, and educational electronics projects.
Practically, the input signals are sent in parallel to all 10 outputs. This means that all connected modules share the same I2C bus. This module only distributes the SCL and SDA lines to all ports. It does not select channels, switch between devices, or change I2C addresses. It is only useful for easier and neater connection.
You can connect multiple I2C sensors in the same place, but only if each sensor has a different I2C address and the bus is not electrically overloaded.
Specifications:
Interface: I2C (SDA, SCL)
Operating voltage: 3.3 - 5VDC
Number of output channels: 10
Channel connection: Parallel
Connectors: 2.54 mm pins
Size: 38 x 20 mm
Usage:
1. Connect the module input pins to the microcontroller as follows:
Module pin
Connection to microcontroller
VCC
3.3V or 5V
GND
SDA
SCL
2. Connect I2C devices to the outputs:
Hub output pin
Connection to I2C sensor/module
VCC
GND
SDA
SCL
After powering up, connect the I2C sensors or modules to the hub’s output ports. The module replicates the SDA and SCL signals on each channel, allowing a neater and faster connection of multiple I2C devices in the same project.
The sensors or modules will function only if the I2C addresses are different. To connect multiple devices with the same address, a multiplexer is required.