{"product_id":"iso1540-stemma-qt-qwiic-bidirectional-i2c-isolator-module-2","title":"ISO1540 STEMMA QT Qwiic Bidirectional I2C Isolator Module","description":"\u003ch2\u003eISO1540 Compatible STEMMA QT \/ Qwiic Bidirectional I2C Isolator Module\u003c\/h2\u003e\n\n\u003cp\u003eProtect your microcontroller and sensitive components with the \u003cstrong\u003eISO1540 Compatible Bidirectional I2C Isolator Module\u003c\/strong\u003e. Designed for makers, engineers, and electronics enthusiasts, this compact board provides robust galvanic isolation on your I2C bus — keeping high-voltage or noisy circuits safely separated from your main logic board without interrupting communication.\u003c\/p\u003e\n\n\u003cp\u003eWhether you're building an industrial sensor array, a home automation project, or a complex robotics system, this isolator module ensures clean, reliable data transfer across isolated power domains. The plug-and-play STEMMA QT and Qwiic connectors make wiring effortless — no soldering required for most setups.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO1540 Chip:\u003c\/strong\u003e Industry-standard bidirectional I2C digital isolator supporting both SDA and SCL lines\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSTEMMA QT \u0026amp; Qwiic Compatible:\u003c\/strong\u003e Standard 4-pin JST SH connectors for rapid, tool-free integration with popular dev boards\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBidirectional Communication:\u003c\/strong\u003e Full I2C pass-through in both directions — works seamlessly as a controller or peripheral side\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGalvanic Isolation:\u003c\/strong\u003e Electrically isolates I2C bus to protect sensitive microcontrollers from voltage spikes and ground loops\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Power Consumption:\u003c\/strong\u003e Efficient design ideal for battery-powered and embedded applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBreadboard \u0026amp; PCB Friendly:\u003c\/strong\u003e Standard 0.1\" (2.54mm) pitch header pins for versatile prototyping\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Voltage Support:\u003c\/strong\u003e Compatible with 3.3V and 5V logic levels\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e Small footprint fits easily into tight enclosures and project builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× ISO1540 Bidirectional I2C Isolator Module\u003c\/li\u003e\n  \u003cli\u003eSTEMMA QT \/ Qwiic JST SH connectors pre-installed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIdeal For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eArduino, Raspberry Pi, and CircuitPython \/ MicroPython projects\u003c\/li\u003e\n  \u003cli\u003eIndustrial sensor and actuator interfacing\u003c\/li\u003e\n  \u003cli\u003eMotor driver and high-voltage circuit isolation\u003c\/li\u003e\n  \u003cli\u003eMedical, robotics, and IoT prototyping\u003c\/li\u003e\n  \u003cli\u003eAny application requiring safe electrical separation of I2C buses\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatible With\u003c\/h3\u003e\n\u003cp\u003eWorks with any STEMMA QT or Qwiic ecosystem board — including Adafruit, SparkFun, and compatible development boards running 3.3V or 5V I2C. Also compatible with standard I2C breakout modules via header pins.\u003c\/p\u003e\n\n\u003cp\u003eLooking for more components for your electronics projects? Check out the \u003ca href=\"\/products\/gy-530-vl53l0x-laser-ranging-sensor-tof-ranging-time-of-flight-ranging-sensor-module-1\"\u003eGY-530 VL53L0X Laser Ranging Sensor ToF Module\u003c\/a\u003e — a great companion for distance sensing applications. You may also enjoy our \u003ca href=\"\/products\/natural-stone-abacus-beads-flat-round-spacer-diy-jewelry-making\"\u003eNatural Stone Abacus Beads Flat Round Spacer for DIY Jewelry\u003c\/a\u003e if you're exploring creative making beyond electronics.\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.epa.gov\/recycle\/used-lithium-ion-batteries\" target=\"_blank\" rel=\"noopener\"\u003eEPA guidance on lithium-ion battery handling\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003ch4\u003eQ: What does the ISO1540 Bidirectional I2C Isolator Module do?\u003c\/h4\u003e\n\u003cp\u003eA: The ISO1540 Bidirectional I2C Isolator Module electrically isolates your I2C bus using galvanic isolation technology. It allows bidirectional communication on both SDA and SCL lines while preventing voltage spikes, ground loops, and electrical noise from passing between your controller and peripheral circuits — keeping your microcontroller and sensors safe in demanding or high-voltage environments.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is the ISO1540 module compatible with Arduino and Raspberry Pi?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The module supports 3.3V and 5V I2C logic levels, making it compatible with Arduino, Raspberry Pi, Adafruit CircuitPython boards, SparkFun Qwiic ecosystem boards, and any other platform with a standard I2C interface. The STEMMA QT and Qwiic JST SH connectors allow for quick, solder-free connections on most development boards.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Do I need to solder to use this I2C isolator module?\u003c\/h4\u003e\n\u003cp\u003eA: Not necessarily. If your development board features STEMMA QT or Qwiic ports, you can connect this module with a compatible JST SH cable — no soldering required. For custom PCB or breadboard setups, standard 0.1\" pitch header pins are also available for easy integration.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the difference between STEMMA QT and Qwiic connectors?\u003c\/h4\u003e\n\u003cp\u003eA: STEMMA QT (by Adafruit) and Qwiic (by SparkFun) use the same JST SH 4-pin connector standard and are electrically identical — both carry VCC, GND, SDA, and SCL on the same pinout. This means STEMMA QT and Qwiic cables and boards are fully interchangeable, and this isolator module works with both ecosystems right out of the box.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does the ISO1540 Bidirectional I2C Isolator Module do?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The ISO1540 Bidirectional I2C Isolator Module electrically isolates your I2C bus using galvanic isolation technology. 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This means STEMMA QT and Qwiic cables and boards are fully interchangeable, and this isolator module works with both ecosystems right out of the box.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/0i45ne-c8.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/0i45ne-c8.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"ISO1540 STEMMA QT Qwiic Bidirectional I2C Isolator Module\", \"item\": \"https:\/\/0i45ne-c8.myshopify.com\/products\/iso1540-stemma-qt-qwiic-bidirectional-i2c-isolator-module\"}]}\u003c\/script\u003e","brand":"Zpaxo","offers":[{"title":"Default Title","offer_id":54256939434294,"sku":"\u003cnone\u003e","price":24.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0989\/7774\/3158\/files\/S090bd01d387741b3828797218407783fe.webp?v=1784694764","url":"https:\/\/zpaxo.com\/products\/iso1540-stemma-qt-qwiic-bidirectional-i2c-isolator-module-2","provider":"Zpaxo","version":"1.0","type":"link"}