ML-4550

The Samsung ML-4550 was the namesake of the high-volume mono line — a departmental black-and-white laser built for the kind of offices where the printer never really rests.

It runs on ML-D4550A or ML-D4550B cartridges. Both compatible and genuine OEM options for the ML-4550 are available here.

Toner Cartridges for ML-4550

This printer works with the following toner cartridges:

• Samsung ML-D4550A
• Samsung ML-D4550B

More Samsung Printers

• ML-4050N
• ML-4055
• ML-4551N
• ML-4551NDR
• ML-4050
• ML-4551
• ML-4551DN
• ML-4551ND
• ML-4551NR
• ML-4050ND
• ML-4550N

Frequently Asked Questions

What's the procedure for checking firmware on the ML-4550?

Get ML-4550 firmware only from the official Samsung or HP support page for your exact model — never from pop-ups or third-party download sites. Download the file, follow the included instructions, and keep the printer powered on the whole time. An interrupted update can brick the printer, so avoid starting one during a storm or on a flaky outlet — and note your ML-D4550A code beforehand in case support asks for it.

Do all cartridges on the ML-4550 trigger the low-toner warning the same way?

Do not rush to replace the ML-D4550A the moment the ML-4550 warns you; the printer measures toner indirectly and errs on the cautious side. Keep printing until pages visibly fade, shaking the cartridge once more when they do. Having the spare on hand removes any deadline pressure.

What cartridges are designed for the ML-4550?

Order by the code for the ML-4550 and you will not go wrong: ML-D4550A is the match, while cartridges from other Samsung families neither fit nor seat correctly. The code appears on the cartridge label and on the inside of the supply door. Shopping by code avoids the most common wrong-cartridge mistake.