Brother TN437BK Ultra High-Yield Black Toner Cartridge

Overview

The TN437BK is Brother's genuine ultra high-yield black toner cartridge, rated for up to 9,000 pages under ISO/IEC 19798 letter/A4 test conditions. At that yield, it's the right choice for workgroups running sustained black-and-white print volume through a single device — fewer cartridge swaps means less downtime during business-critical print runs. Output is laser-quality with consistent density; Brother's formulation is designed to resist fading and smearing on the finished page.

Compatibility

Designed specifically for the Brother MFC-L8905CDW color laser multifunction printer. The TN437BK is engineered to the printer's firmware and feed tolerances — Brother explicitly notes that non-genuine toner may cause mechanical damage and could void the printer's limited warranty. If you run the MFC-L8905CDW in a shared office or print-room environment, this cartridge's 9,000-page yield reduces the frequency of supply interventions compared to standard-yield alternatives in the TN43x series.

Installation Notes

Install into the black toner slot of the MFC-L8905CDW following the standard front-access toner replacement procedure. No tools required. The cartridge is keyed to the black position — it will not seat in cyan, magenta, or yellow slots. Brother recommends keeping replacement cartridges sealed in original packaging until installation to preserve toner integrity.