> **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

# 5.5mm/2.1mm DC Barrel Polarity Reversing Cable

**Type:** Product page · **SKU:** ADA5917 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/55mm21mm-dc-barrel-polarity-reversing-cable.html ([markdown](https://core-electronics.com.au/55mm21mm-dc-barrel-polarity-reversing-cable.html.md))

Once in a while we find products that have center negative DC power jacks and they really make us mad because who keeps around both positive and negative...

## Pricing

- **Price:** $7.50 (inc GST) — $6.82 AUD, exc GST
- **Quantity discounts:** 10+ $6.62 (exc GST) · 50+ $6.47 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 3 today, and up to 500 more in 8–12 days.

## How to buy

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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

Once in a while Adafruit find products that have center *negative* DC power jacks and they really make Adafruit mad because who keeps around both positive and negative polarity versions of every voltage? Now, hopefully [USB Power Delivery](https://core-electronics.com.au/adafruit-usb-type-c-power-delivery-dummy-breakout-i2c-or-fixed-husb238.html) will solve this long term, but till then this **2.1mm DC polarity reversal adapter** will have to do!

Usage is very simple: plug onto any 2.1mm/5.5mm DC plug (or jack!) and what was center-negative will magically swap to center-positive. Now your guitar pedals, label printers, etc will be able to use the common DC power adapters you have on hand.

## Technical Details 

- 24AWG
- ~15cm long

- [Datasheet](https://core-electronics.com.au/attachments/localcontent/C20498-001_datasheet_26864cc4823.pdf)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/A/D/ADA5917-1.jpg)