> **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

# Adafruit STEMMA Analog SPDT Switch - MAX4544 12V - JST PH 2mm

**Type:** Product page · **SKU:** ADA5892 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/adafruit-stemma-analog-spdt-switch-max4544-12v-jst-ph-2mm.html ([markdown](https://core-electronics.com.au/adafruit-stemma-analog-spdt-switch-max4544-12v-jst-ph-2mm.html.md))

Analog switches are a solid state alternative to relays, when you want a smaller, lower-power technology that won't wear out mechanically. As the name...

## Pricing

- **Price:** $10.55 (inc GST) — $9.59 AUD, exc GST
- **Quantity discounts:** 10+ $9.30 (exc GST) · 50+ $9.11 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 2 today, and up to 3 more in 8–12 days.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=ADA5892:1` (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/ADA5892:1.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

Analog switches are a solid state alternative to relays, when you want a smaller, lower-power technology that won't wear out mechanically. As the name implies, you can use an analog switch chip to select between two analog signals, much like a mechanical switch. These chips tend to be tiny surface mount parts, so the **Adafruit STEMMA Analog SPDT Switch** lets anyone use the MAX4544 SPDT analog switch for signals up to 12V, without fiddly soldering.

When the selection signal is low, the Common pin is connected to the Normally Closed (NC) pin and disconnected from the Normally Open (NO) pin. When the selection signal is high, the Common pin is connected to NO and disconnected from NC.

Unlike a relay or mechanical switch, analog switches don't wear out, and the switch time is near instant, about 30nS. The MAX4544 chip also guarantees break-before-make so the NC and NO pins will never accidentally cross-connect.

However, there's a few things to watch out for:

- **The V+ power pin** (also the red wire if using a STEMMA cable) **must as high as the highest analog voltages you want to switch**. That means if the analog signals are no more than 6VDC, the V+ pin must be higher than 6V. You cannot power this pin with 3.3V and switch 12V signals.
- **The MAX4544 cannot switch signals below ground**. No negative voltages can be applied to the COM/NO/NC pins!
- **Analog switches are for signals, not power!** Since this is not a mechanical switch, the signals pass through circuitry that is not designed to source or sink current. This is great for analog signal voltages, and is not good for providing more than a few mA of current.

This board has a simple plug-and-play JST PH (2mm pitch) input connector for solderless use. Provide V+ power (from 3V up to 12V) and signal of at least 2.5VDC logic level. On the output is a terminal block with the common, Normally Open and Normally Closed signals. You can also get to all the signal and power pins on a 0.1" breakout header if desired.

## Technical Details 

Product Dimensions: 25.3mm x 17.8mm x 10.1mm / 1.0" x 0.7" x 0.4"

Product Weight: 2.7g / 0.1oz

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/A/D/ADA5892-1.jpg)