Brother MFC-J6740DW Ink Cartridges
Your Brother MFC-J6740DW uses the LC432 / LC432XL cartridge series. We have been supplying consumables for this printer since Aug 2022, supporting its high-performance A3 inkjet capabilities. This printer utilizes a four-cartridge system where each colour is replaced individually, preventing the waste commonly seen in tri-colour systems. For most small business environments, switching from the standard LC432 to the high-yield LC432XL series is a standard transition as it significantly reduces the frequency of replacements during large print runs.
Choosing between genuine and compatible options
For users focused on overheads, we provide high-quality compatible alternatives to the genuine Brother range. These cartridges are engineered to match the fit and performance of the original series while offering a lower price point. Under Australian Consumer Law, using compatible cartridges does not void your printer warranty. Our compatible LC432XL units are a popular choice for high-volume drafting and internal documentation. You can read more about how these differ from originals in our genuine vs compatible guide.
Expected page output and replacement cycles
The number of prints you get out of each cartridge depends heavily on the yield version selected. Brother determines these yields based on the ISO/IEC 24711 quality standard for inkjet products, which provides a reliable baseline for office environments. The LC432XL black cartridge is designed to handle significantly more volume than the colours, reflecting the typical office imbalance where text-heavy documents are the primary output.
| Cartridge Number | Type | Colour | Page Yield | Cost Per Page |
|---|---|---|---|---|
| LC432BK | Standard | Black | 550 | $0.090 |
| LC432C | Standard | Cyan | 550 | $0.060 |
| LC432M | Standard | Magenta | 550 | $0.060 |
| LC432Y | Standard | Yellow | 550 | $0.060 |
| LC432XLBK | High Yield | Black | 3,000 | $0.025 |
| LC432XLC | High Yield | Cyan | 1,500 | $0.032 |
| LC432XLM | High Yield | Magenta | 1,500 | $0.032 |
| LC432XLY | High Yield | Yellow | 1,500 | $0.032 |
Cost Per Page = Total Cartridge Price ÷ Page Yield (at 5% coverage). Prices based on Genuine cartridges.
Best way to stock these cartridges
If you primarily print monochrome business documents, stocking individual LC432XLBK cartridges is the most efficient approach. However, if your work involves marketing materials or colourful spreadsheets, the LC432 and LC432XL value packs offer the best value. These bundles ensure you aren't caught short when one colour depletes. If you decide to try our compatible range to reduce costs, they come with a full money-back guarantee if they do not perform as expected.
Free delivery applies on all orders over $99 (conditions apply). We maintain stock in warehouses across Brisbane, Perth, Melbourne, Adelaide, and Sydney to ensure your order reaches you as quickly as possible. You can browse our full range of Brother ink cartridges and check our Returns policy for extra peace of mind.
Pro Tip
Always keep a spare LC432XL black cartridge on hand. The MFC-J6740DW is a workhorse, and because it uses a permanent printhead, it will often stop all functions if the black ink is completely exhausted to prevent the nozzles from drying out.
Frequently Asked Questions
Can I mix a genuine Brother LC432BK with compatible LC432XL colour cartridges?
Yes, you can mix genuine and compatible cartridges within the same printer. The printer's internal chip reader will recognise each individual cartridge regardless of its brand, allowing you to replace colours with compatibles as they run out while keeping a genuine black, or vice versa.
Why does my magenta ink run out even when I mostly print in black?
The MFC-J6740DW, like most professional inkjet printers, performs periodic maintenance cycles to keep the printhead nozzles clear. These cycles use a small amount of ink from every cartridge, including colours. Additionally, the printer may use a technique called "under-colour removal" where small amounts of cyan, magenta, and yellow are mixed with black to create a deeper, richer black tone.
Is there a physical size difference between the LC432 and the LC432XL?
Externally, the LC432 and LC432XL cartridges are identical in shape and size. They fit into the same slots in your Brother printer. The "XL" designation refers purely to the internal ink volume, with the high-yield version containing more ink to provide a higher number of prints.
