> **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

# 2.1mm to 2.5mm DC Barrel Plug Adapter

**Type:** Product page · **SKU:** ADA2897 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/2-1mm-to-2-5mm-dc-barrel-plug-adapter.html ([markdown](https://core-electronics.com.au/2-1mm-to-2-5mm-dc-barrel-plug-adapter.html.md))

"Hrmph! All I have is a power supply with a 2.1mm plug and my doodly-whatsit has a 2.5mm jack. I keep trying to force the plug to fit but that 0.4mm difference just...

## Pricing

- **Price:** $2.25 (inc GST) — $2.05 AUD, exc GST
- **Quantity discounts:** 10+ $1.98 (exc GST) · 50+ $1.95 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 1 today, and up to 1 more in 8–12 days.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=ADA2897:1` (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.
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- **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

"Hrmph! All I have is a power supply with a 2.1mm plug and my doodly-whatsit has a 2.5mm jack. I keep trying to force the plug to fit but that 0.4mm difference just wont work....what am I going to do!?"

ENTER *The Adapter.* This 2.1mm to 2.5mm adapter is the best way to adapt a 2.1mm plug so that it will fit into a 2.5mm jack.

**Remember that this will fit into a device that normally would require a 5.5 OD / 2.5mm ID plug, and lets you use a 5.5/2.1mm plug.** Once this is in place you can just [any and all of Adafruit's DC barrel-plug wall adapters, as they all have 2.1mm plugs](https://www.adafruit.com/categories/137).

## Technical Details

- Dimensions: 41mm x 13mm / 1.6" x 0.5"
- Weight: 4.5g

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/2/8/2897-00.jpg)