SKU:

CS-Bro-OEM-TN439-Black

Printer Brand:

Brother

OEM Number:

TN439BK

Ink Color:

Black

Page Yield:

Black:9000

Printer Type:

Laser Cartridge

Condition:

New

Frequently Asked Questions

Why is the biggest black cartridge in this family also the cheapest way to print from it?

Run the numbers and the TN439BK wins twice over. It is rated at 9,000 pages and sells here for $140.65, which works out to roughly 1.6 cents a page — the lowest black cost on this platform. It even undercuts the standard-tier cartridge for the same machines on purchase price alone: the TN436BK costs more to buy and is rated at 2,500 fewer pages. Against its own $196.91 list price, this cartridge is $56.26 off. If your machine takes the TN439BK, there is no page-economics argument for choosing anything smaller.

How long does a 9,000-page cartridge last in a real office?

It depends on the machine's workload, but the scale is easy to picture. A department printing around 500 pages a month would take roughly a year and a half to empty one TN439BK. A busy workgroup at 1,500 pages a month gets about six months from it. These are high-volume color machines, bought for exactly that kind of duty, and the ultra high-yield black is sized so that cartridge changes become a twice-a-year event rather than a monthly interruption.

Which printers run the TN439BK?

Five flagship models: the HL-L9310CDW, HL-L9310CDWT and HL-L9310CDWTT printers, and the MFC-L9570CDW and MFC-L9570CDWT all-in-ones. That short list is the whole platform — Brother's top-tier color laser line — and the TN439BK is the black cartridge built for it. If your machine is one of those five, this is the highest-capacity black it accepts.

What drum does it print through, and how do the two lifespans compare?

These machines image through the DR433CL drum set, rated at around 50,000 pages. Set against the TN439BK's 9,000 pages, one drum set carries roughly five to six black cartridges — plus the color cartridges printing alongside them — before it is due. The two parts age independently: fading output usually means toner, while repeating marks at regular intervals point to the drum. Replace each on its own schedule and neither purchase is wasted.

My printer has been running the smaller TN436 cartridges — can I switch to this one?

Yes. The TN436 and TN439 families serve the same five machines, and the cartridges are interchangeable between the two tiers with no settings to change: fit the TN439BK and the printer simply reports the larger supply. Many owners make the switch permanent once they see the per-page figures — the ultra cartridge asks less money for more pages, so the standard tier only really suits machines being retired or sold on soon.

What cover comes with this cartridge?

As genuine Brother stock it can be returned within 30 days in all cases, and its warranty protection is Brother's own manufacturer warranty — the full wording sits on our shipping and returns page. Anything that arrives damaged or faulty should be raised with our support team, Monday to Friday, 9 AM to 5 PM CST, so it can be put right inside that window.

About This Genuine Brother TN439BK Toner Cartridge

The TN439BK is the ultra high-yield black for Brother's flagship color platform: 9,000 rated pages at $140.65 against a $196.91 list price, and at roughly 1.6 cents a page the cheapest black printing those machines can do. It serves the HL-L9310CDW series and the MFC-L9570CDW series. The rest of the genuine line for these printers is in the Brother range at Clever Supplies, and orders leave from our Illinois, Pennsylvania, Georgia or California warehouse.