HiLetgo ISO1540 Bidirectional Insulation Separator I2C Isolator 2500 V-RMS Isolator Compatible to Stemma QT Qwiic

Description

Product Overview

The HiLetgo ISO1540 is a bidirectional insulation separator designed for I2C communication isolation up to 2500 V-RMS. It ensures safe signal transmission between isolated circuits while maintaining compatibility with STEMMA QT and Qwiic systems. With a compact form factor (3 x 2 x 0.25 inches) and low weight (0.81 oz), it’s ideal for embedded projects requiring robust isolation without compromising space or power efficiency. The device operates on a 3V to 5.5V supply range, making it suitable for most microcontroller platforms.

Usage

The ISO1540 is perfect for industrial and scientific applications where signal isolation is critical — such as sensor networks, motor control systems, or power distribution boards. It’s also suitable for hobbyist projects using Arduino, Raspberry Pi, or ESP32 with STEMMA QT/Qwiic modules. Its compatibility with popular ecosystems makes it easy to integrate into existing designs without requiring major redesigns.

Why Choose Us

The HiLetgo ISO1540 is engineered for reliability and ease of integration. It features HBM ESD protection up to 4kV on all pins, with bus pin voltage tolerance up to 8kV — ensuring durability in real-world conditions. The product’s compact size allows it to fit into tight spaces without compromising performance. Manufactured by HiLetgo, a trusted brand in industrial electronics components, the ISO1540 comes with consistent quality assurance and is backed by customer support for technical inquiries.

Key Features

• Robust 2500V RMS insulation ensures safe signal isolation in high-voltage environments.
• Compatible with STEMMA QT and Qwiic systems — plug-and-play integration for popular microcontrollers.
• Built-in HBM ESD protection up to 4kV on all pins, with bus pin tolerance of 8kV for enhanced durability.
• Compact size (3 x 2 x 0.25 inches) and lightweight design make it ideal for space-constrained projects.
• Supports 3V to 5.5V power supply range — compatible with most microcontroller platforms including Arduino, ESP32, and Raspberry Pi.

FAQ

What voltage rating does the ISO1540 support?

The HiLetgo ISO1540 supports a bidirectional insulation separation of up to 2500 V-RMS, making it suitable for high-voltage industrial applications.

Is this compatible with STEMMA QT and Qwiic systems?

Yes. The ISO1540 is specifically designed to be compatible with STEMMA QT and Qwiic ecosystems, allowing seamless integration into existing projects using these interfaces.

What ESD protection does it offer?

The device features HBM ESD protection of 4kV on all pins, with bus pin voltage tolerance up to 8kV — ensuring durability in real-world conditions.

Can I use this with Arduino or Raspberry Pi?

Absolutely. The ISO1540 operates within a 3V to 5.5V power range and is compatible with most microcontroller platforms including Arduino, ESP32, and Raspberry Pi.

What’s the size of the product?

The HiLetgo ISO1540 measures 3 x 2 x 0.25 inches and weighs only 0.81 ounces — making it compact and lightweight for embedded applications.