The original Brother TN3145 black toner is rated for about 3,500 pages in MFC-8860DN, MFC-8460N, HL-5270DN, HL-5250DN and HL-5240 printers. It delivers crisp text and clean graphics for invoices, reports and coursework. A reliable choice for small businesses and busy offices.
Key details
- Brand: Brother (original)
- Part code: TN3145
- Colour: Black
- Page yield: approx. 3,500 pages
- Type: monochrome laser toner
- Use: business documents, reports, invoices and academic material
- Easy drop-in replacement
Suits the following printers
Brother MFC-8860DN, MFC-8460N, HL-5270DN, HL-5250DN, HL-5240
Every Brother TN3145 Black Toner we sell is checked against its listing details before it ships.
Add the Brother TN3145 Black Toner to your cart today and it will be on its way within one to two business days.
If you print often, keeping a spare Brother TN3145 Black Toner on hand saves downtime when the current one runs low.
Good to know
How many pages does TN3145 print?
About 3,500 pages. That gives busy small offices a good stretch of printing between cartridge changes.
Which printers use it?
The MFC-8860DN, MFC-8460N, HL-5270DN, HL-5250DN and HL-5240. These monochrome lasers are common in small businesses and corporate offices, and all take the same TN3145 cartridge.
How to install the Brother TN3145 Black Toner
- Open the front or top cover and let the printer cool for a few minutes if it has just been printing.
- Remove the used cartridge. On printers with a separate drum unit, take out the drum and toner together, then push the lock lever and lift the toner cartridge out of the drum.
- Unpack the new cartridge and gently rock it side to side five or six times to spread the toner evenly. Remove any protective strip or cover.
- Slide the cartridge into place (or into the drum unit until it clicks), refit the assembly and close the cover.
Storage and handling
Store spare toner sealed in its bag, lying flat, at normal room temperature and away from humidity and direct sunlight. Do not touch the drum surface or the roller, as skin oils and scratches can show up as marks on your prints.
Getting the most from each cartridge
When the printer shows a low toner warning, taking the cartridge out and gently rocking it can often give extra pages before it needs replacing. Toner save mode is handy for drafts and internal copies. Used cartridges can be dropped at a Cartridges 4 Planet Ark collection point for free recycling.
Delivery, returns and support
Orders are packed within 1–2 business days and sent with tracking to every Australian state for a flat $19.99 delivery fee. Change your mind? Let us know within 30 days of delivery under our returns policy, and faulty items are covered by Australian Consumer Law. Not sure this is the right part for your machine? Send us your printer model and we will confirm before you order.









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