> **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

# Modulino Latch Relay

**Type:** Product page · **SKU:** ABX00138 · **Brand:** [Arduino](https://core-electronics.com.au/brands/arduino-australia)
**Page:** https://core-electronics.com.au/arduino-modulino-latching-relay.html ([markdown](https://core-electronics.com.au/arduino-modulino-latching-relay.html.md))

Control high-power devices or circuits with a single digital connection.

## Pricing

- **Price:** $16.75 (inc GST) — $15.23 AUD, exc GST

## Availability & dispatch

- Out of stock — the product page offers email notification when it returns.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=ABX00138:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/ABX00138:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **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

Ideal for automation and energy-conscious designs, this ready-to-use node connects in seconds, plays nicely with Arduino tools, and daisy-chains with other Modulino parts for rapid prototyping without rewiring.

Compatibility is straightforward on a 3.3 V Qwiic I2C bus. You can place several nodes on one connector and assign each a unique address using the Modulino library and its AddressChanger example.

**Technical Specifications**

| Board name | Modulino Latch Relay |
|---|---|
| SKU | ABX00138 |
| Featured component | SY32A-S-105D1M1 (STM32C011 for I2C communication) |
| Bus | I2C via Qwiic |
| I2C address | 0x04, adjustable via software |
| Supply voltage | 3.3 V (from Qwiic connector) |
| Logic level on pins | 3.3 V |
| Dimensions | 41 mm x 25.36 mm |
| Weight | 4.4 g |
| Included accessory | Qwiic cable, 5 cm |

**Additional Resources**

- Schematics
- Datasheet

**What’s Included**

- Modulino Latch Relay board
- Qwiic cable, 5 cm

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/A/B/ABX00138-3.jpg)