Brother HL-5240 Toner Cartridges
Shop toner cartridges for your Brother HL-5240, which uses the Brother TN-3145 and TN-3185 toner cartridge series along with DR-3115 drum units. Ink Depot has been supplying reliable consumables for this fast A4 monochrome laser printer since Aug 2026. High-volume document workflows benefit significantly from stepping up from the standard TN-3145 to the high-yield TN-3185 cartridge to drop page expenses. Our 4.8 Google rating proves it: we consistently supply premium cartridges backed by rock-solid reliability.
Expected page output and replacement cycles
Black toner yield for ISO/IEC 19752 standard testing is calculated at 5% page coverage. High-yield TN-3185 cartridges yield up to 7,000 pages, doubling the output of standard TN-3145 cartridges (3,500 pages) to lower cost per page during frequent document printing.
| Cartridge Number | Type | Colour | Page Yield | Cost Per Page |
|---|---|---|---|---|
| TN-3145 | Standard | Black | 3,500 | $0.047 |
| TN-3185 | High Yield | Black | 7,000 | $0.020 |
Cost Per Page = Total Cartridge Price ÷ Page Yield (at 5% coverage). Prices based on Genuine cartridges.
Drum unit lifecycle
The DR-3115 drum unit operates independently from the toner cartridge and carries an expected lifespan of 25,000 pages. Experience Tip: A single DR-3115 drum unit generally lasts through three to four high-yield TN-3185 toner cartridge replacements before requiring renewal.
Choosing genuine vs compatible toner
Under Australian Consumer Law, using compatible cartridges does not void your printer warranty. Compatible TN-3185 cartridges offer significant savings while maintaining clean, crisp text print output. You can compare options in our genuine vs compatible cartridge guide.
Stocking strategies for busy offices
If you print high volumes of text documents, choosing high-yield TN-3185 cartridges or bundle packs provides the lowest running costs. Compatible options include a money-back guarantee if they do not perform to expectations. Please see our returns policy for full details. Free delivery applies on all orders over $99, dispatched quickly from local warehouses in Sydney, Melbourne, Brisbane, Perth, and Adelaide. Buy your Brother toner cartridges today.
Pro Tip
Always keep a fresh TN-3185 toner on hand when your DR-3115 drum unit starts approaching 25,000 prints, as drum wear can accelerate toner consumption slightly during final print cycles.
Frequently Asked Questions
How do I know whether to replace the TN-3185 toner or the DR-3115 drum?
The printer displays separate alert messages on the control panel. A toner message indicates the TN-3185 cartridge is empty, whereas a drum warning indicates the DR-3115 imaging assembly has reached its 25,000-page operational life limit.
Can I install a high-yield TN-3185 toner cartridge if my printer previously used a standard TN-3145?
Yes, both TN-3145 and TN-3185 cartridges share the same external frame size and click directly into the same DR-3115 drum housing slot.
Why does actual page yield vary from the rated 7,000 pages on a TN-3185 cartridge?
Page yields are tested against standard 5% coverage per page (similar to a short business letter). Printing dense text, bold headers, or full-page PDF documents consumes toner faster, resulting in fewer overall pages per cartridge.
