HP 125A Black Toner Cartridge (CB540A) – Compatible | Castle Ink

HP 125A Black (CB540A) at a glance: a black toner cartridge rated at about 2,200 pages. Compatible: newly manufactured to HP's specifications. Fits the HP Color LaserJet CP1215, CP1515n, CP1518ni and CM1312 MFP. The imaging drum is built in. Backed by a 1-year 100% satisfaction guarantee; orders by 4 PM ET (Mon–Fri) ship the same day from Long Island, NY.

Key Facts

What's in the Box

• 1 × HP 125A Black (CB540A) compatible toner cartridge — about 2,200 pages

Page yields are the manufacturer's rating for the matching original cartridge, measured at roughly 5% page coverage under ISO/IEC 19752 or 19798 testing. Your results will vary with what you print.

Compatible Printers (5 models)

• HP Color LaserJet CP1215
• HP Color LaserJet CP1515n / CP1518ni
• HP Color LaserJet CM1312 MFP / CM1312nfi MFP

Don't mix these up: HP 125A fits these printers only. It looks like HP 128A (CP1525/CM1415) and HP 131A (M251/M276) but is not interchangeable.

Not sure? Look up your exact model on our Find Ink by Printer page, or contact us and we'll confirm the right toner for you.

Part Numbers & Also Known As

This toner cartridge replaces or is also searched for as: CB540A, HP CB540A, HP 125A black, HP125A black, 125A black toner, HP 125A toner, HP125A, 125A, CP1215 toner, CM1312 toner

Chips, Printer Messages & Installation

Installing: open the printer's toner door, pull out the empty cartridge by its handle, then rock the new cartridge gently side to side five or six times to spread the toner. Remove the orange shipping lock and pull the sealing tape straight out, then slide the cartridge in until it seats and close the door.

Chip and supply messages: this compatible cartridge carries its own chip. The printer may show a "non-HP" or "used supply" notice; press OK to continue. If the cartridge isn't recognized, remove it, check that all packing material is off and reseat it firmly. Keeping automatic firmware updates off avoids most chip problems.

Streaks or faint print: rock the cartridge again to redistribute toner and print a cleaning page from the printer menu. See laser printer streaks and lines.

Still stuck? See our guide to fixing a cartridge that isn't recognized or contact us and we'll make it right.

Compatible vs. Remanufactured vs. Original

Original (OEM) toner is new from the printer brand and costs the most. Compatible toner, like this cartridge, is newly manufactured by a third party to the original's size, chip and page-yield specifications, so it drops into the same slot at a much lower price. Remanufactured toner is an emptied original cartridge that has been rebuilt and refilled. Castle Ink sells compatible (newly manufactured) toner and remanufactured inkjet cartridges.

Other Options for the Same Printers

• HP 125A Cyan Toner Cartridge (CB541A)
• HP 125A Magenta Toner Cartridge (CB543A)
• HP 125A Toner Cartridges
• HP 125A Yellow Toner Cartridge (CB542A)

Frequently Asked Questions

How many pages does the HP 125A black print?

About 2,200 pages, based on HP's rating for the original CB540A at roughly 5% coverage.

Will this void my printer warranty?

No. Under the U.S. Magnuson-Moss Warranty Act, a manufacturer can't void your printer warranty just because you used a third-party or remanufactured supply. If a non-original supply directly caused damage, that specific repair might not be covered.

How long can I store it?

Sealed toner keeps for about two years at room temperature. Keep it in its bag, away from heat and direct sunlight, and store it flat.

When will my order ship?

Orders placed by 4 PM ET, Monday through Friday, ship the same business day from Long Island, NY, by USPS (2–5 business days). Expedited 1–2 day delivery is available at checkout, and shipping is free on orders over $50.