> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # SparkFun Qwiic Quad Solid State Relay Kit **Type:** Product page · **SKU:** KIT-16833 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia) **Page:** https://core-electronics.com.au/sparkfun-qwiic-quad-solid-state-relay-kit.html ([markdown](https://core-electronics.com.au/sparkfun-qwiic-quad-solid-state-relay-kit.html.md)) ## Retired product This product is retired and no longer available for purchase. Search the catalogue for an alternative. > ⚠ Warning: this product if used with high voltages (such as 240VAC) requires a license to work with in most regions. ## How to buy - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description The SparkFun Qwiic Quad Solid State Relay Kit takes one of our favorite [solid state relays](https://core-electronics.com.au/search/?q=13015) and lets you place up to four of them on a single PCB to control all of them via I2C from your desired microcontroller. Each relay is rated to 40A @ 28-380 VAC so with all four on board you can control some serious power all from the easy-to-use Qwiic Connect System. The kit requires no soldering but there is some minor assembly required to attach the relays to the board and to connect your AC load. The ATTiny84 on the board comes pre-programmed to accept various commands to toggle all four relays. The I2C address of the ATTiny84 is software configurable so so if you had the desire and power, you could daisy chain over 100 Qwiic Quad Relays (but please be aware that toggling lots of relays on a 3.3V bus can cause voltage spikes so an external power supply will be required)! In addition, the address jumper can be opened to switch the I2C address from 0x08 (Default) to 0x09 (Alternate). **Note:** The black standoffs and 4-40 screws used to secure them shown in some of the photos are NOT included with the kit. Check out the Hookup Accessories below if you would like to include some in your order. *The SparkFun Qwiic connect system is an ecosystem of I2C sensors, actuators, shields and cables that make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector. This reduces the amount of required PCB space, and polarized connections mean you can't hook it up wrong.* [Get Started with the SparkFun Qwiic Quad Solid State Relay Kit Guide](https://learn.sparkfun.com/tutorials/sparkfun-qwiic-quad-solid-state-relay-kit-hookup-guide) **Includes** - 1x Qwiic Quad Solid State PCB - 4x Solid State Relay - 40A (3-32V DC Input) - 8x 4-40 Hex Nut - 8x 3/8in. Phillips Machine Screw - 4-40 Thread - Hook-up Wire 8" - 22 AWG (Red) - Hook-up Wire 8" - 22 AWG (Black) **Features** - Operating Voltage: 2.5-3.6V (3.3V recommended) - I2C Address: 0x08 (Default), 0x09 (Alternate via jumper) - Max Current (Through Relay): 40A (24-380VAC) - Zero Cross Trigger - Normally Open Circuit Only **Documents** - [Schematic](https://core-electronics.com.au/attachments/localcontent/SparkFun_Qwiic_Quad_Solid_State_Relay-Schematic_11017a9c38e.pdf) - [Eagle Files](https://core-electronics.com.au/attachments/localcontent/Qwiic_Quad_Solid_State_Relay-EagleFiles_15758d3db35.zip) - [Board Dimensions](https://core-electronics.com.au/attachments/localcontent/Qwiic_Quad_Solid_State_Relay-Dimensions_48194b55d24.png) - [Hookup Guide](https://learn.sparkfun.com/tutorials/sparkfun-qwiic-quad-solid-state-relay-kit-hookup-guide) - [Datasheet](https://core-electronics.com.au/attachments/localcontent/SSR40DA_166369fbeb4.pdf) (Relay) - [Qwiic Resource Page](https://www.sparkfun.com/qwiic) - [Arduino Library](https://github.com/sparkfun/SparkFun_Qwiic_Relay_Arduino_Library) - [Python Package](https://github.com/sparkfun/Qwiic_Relay_Py) - [ReadtheDocs](https://sparkfun-qwiic-relay.readthedocs.io/en/latest/?) - [Hardware GitHub Repository](https://github.com/sparkfun/Qwiic_Quad_Solid_State_Relay) ## Guides for this product - [How to use a PiRelay HAT for Raspberry Pi - Multiple Relay Control with Voice or GUI](https://core-electronics.com.au/guides/raspberry-pi/pi-4-relay-hat-guide/) ## Videos for this product - [How to use a PiRelay HAT for Raspberry Pi - Multiple Relay Control with Voice or GUI](https://core-electronics.com.au/videos/how-to-use-a-pirelay-hat-for-raspberry-pi-multiple-relay-control-with-voice-or-gui) ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/1/6/16833-sparkfun_qwiic_quad_solid_state_relay_kit-01.jpg)