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Black rectangular toner cartridge in sealed packaging

eSquareOne

eSquareOne S1-BR-TN221BK-B1 toner cartridge black 1-pack 2500 pages

SKU CH-YZ3M-YR34W

Compatible black toner cartridge yielding 2500 pages for Brother HL-3140CW, 3170CDW, MFC-9130CW, 9330CDW and 9340CDW printers

  • Cartridge Quantity1 Pack
  • Cartridge ColorBlack
  • Replacement BrandBrother
  • Replacement ModelBrother TN221BK
  • Compatible ProductsBrother HL-3140CW 3170CDW MFC-9130CW 9330CDW 9340CDW
  • Approximate Page Yield2500 Pages
  • Prints up to 2500 pages at 5% coverage
  • Fits Brother HL-3140CW, HL-3170CDW, MFC-9130CW, MFC-9330CDW, MFC-9340CDW
  • Operates reliably from 10 to 32.5 °C and 20 to 80% humidity
  • Manufactured under ISO 9001 and ISO 14001 quality systems
  • New compatible cartridge replaces Brother TN221BK black toner

Compatible Black Toner for Brother Printers

This eSquareOne cartridge replaces the Brother TN221BK and works with HL-3140CW, HL-3170CDW, MFC-9130CW, MFC-9330CDW and MFC-9340CDW models. It is a new aftermarket unit supplied in a single black pack. Buyers who need colour cartridges or a multi-pack bundle will not find them here.

Consistent Yield Across Print Runs

The cartridge is rated for approximately 2500 pages at five percent coverage. Operating limits are ten to thirty-two point five degrees Celsius and twenty to eighty percent relative humidity. Storage tolerances extend from minus twenty to forty degrees Celsius at the same humidity range. These conditions support steady output during extended print jobs.

Straightforward Installation with Included Notes

The package contains installation notes to guide the replacement process. No special tools or firmware steps are required beyond the normal printer cartridge swap. Users who expect an integrated chip reset utility or automatic recognition on non-listed models may encounter compatibility issues.

Highlights

  • Prints up to 2500 pages at 5% coverage
  • Fits Brother HL-3140CW, HL-3170CDW, MFC-9130CW, MFC-9330CDW, MFC-9340CDW
  • Operates reliably from 10 to 32.5 °C and 20 to 80% humidity
  • Manufactured under ISO 9001 and ISO 14001 quality systems
  • New compatible cartridge replaces Brother TN221BK black toner

Specifications

BrandeSquareOne
ModelS1-BR-TN221BK-B1
Cartridge Quantity1 Pack
Cartridge ColorBlack
Replacement BrandBrother
Replacement ModelBrother TN221BK
Compatible ProductsBrother HL-3140CW 3170CDW MFC-9130CW 9330CDW 9340CDW
Approximate Page Yield2500 Pages
Coverage5%
TypeCompatible
FeaturesThis is an eSquareOne alternative replacement for OEM product, replaces Brother TN221BK black toner cartridge. eSquareOne Toner cartridges are engineered to meet the highest standard of quality, yield and reliability.
OptionTN221BK
Operating Humidity20 to 80% RH
Storage Humidity20 to 80% RH
Operating Temperature10 to 32.5°C
Storage Temperature-20 to 40°C

Questions about this item

How much heat can the eSquareOne S1-BR-TN221BK-B1 cartridge handle during long print runs?

The cartridge operates between 10 and 32.5 °C and tolerates 20 to 80 % RH while printing, so normal office conditions are well within range.

Which printer must I already own for this black toner to work?

It fits Brother HL-3140CW, HL-3170CDW, MFC-9130CW, MFC-9330CDW and MFC-9340CDW models.

Will this cartridge work alongside the colour cartridges already in my Brother MFC-9330CDW?

Yes, it replaces only the TN221BK black unit and is designed to function with the existing cyan, magenta and yellow cartridges in that printer.

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