Epson 542 Black EcoTank Pro Ink Bottle (T542120-S) – 130 ml Compatible

Epson 542 Black Ink Bottle at a glance: a 130 ml black ink bottle, newly made in the USA to match the original Epson 542 ink. Fits the Epson EcoTank Pro ET-5150–ET-5880, ET-16600/16650 and WorkForce ST-C5000–ST-C8090. 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 × Epson 542 Black (T542120-S) compatible ink bottle — 130 ml

Compatible Printers (12 models)

• Epson EcoTank Pro ET-5150 / ET-5170 / ET-5180
• Epson EcoTank Pro ET-5800 / ET-5850 / ET-5880
• Epson EcoTank Pro ET-16600 / ET-16650
• Epson WorkForce Pro ST-C5000 / ST-C5500
• Epson WorkForce ST-C8000 / ST-C8090

Don't mix these up: Epson 542 bottles fit the EcoTank Pro and WorkForce ST-C business printers listed. They are not the same as Epson 502 or 522.

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

Part Numbers & Also Known As

This ink bottle replaces or is also searched for as: T542120, Epson 542 black, 542 black ink, ET-5850 black ink

Chips, Printer Messages & Installation

Filling: open the ink tank cover and the cap for one color. Remove the bottle cap and seal, then stand the bottle upright in the matching tank port; the keyed nozzle only fits the right color. The ink flows in and stops automatically when the tank is full. Remove the bottle, close the caps and repeat for the other colors.

After filling: if the printer asks, confirm on the control panel that you filled the tanks. Keep leftover ink capped and upright for the next fill.

Streaks or missing colors: run a nozzle check and head cleaning from the maintenance menu. The print head stays in the printer, so let it rest between cleanings.

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

Compatible vs. Original Ink Bottles

Original Epson bottles are new from Epson and cost the most. Compatible bottles, like this one, are newly made in the USA to match the original color and fit the same tank ports, at a much lower price. Castle Ink sells compatible ink bottles and toner and remanufactured inkjet cartridges.

Other Options for the Same Printers

• Epson 542 EcoTank Pro Ink Bottles
• Epson 542 Cyan EcoTank Pro Ink Bottle (T542220-S)
• Epson 542 Magenta EcoTank Pro Ink Bottle (T542320-S)
• Epson 542 Yellow EcoTank Pro Ink Bottle (T542420-S)

Frequently Asked Questions

How many pages will this bottle print?

Epson rates its original 542 black (127 ml) at about 7,500 pages at standard coverage. This bottle holds 130 ml, so your page count depends on its fill compared with the original and on what you print.

Will the printer warn me about non-original ink?

Ink tank printers do not read chips on bottles. After filling, confirm or reset the ink level on the control panel if the printer asks.

Can I mix it with the ink already in the tank?

Yes. Top up the tank before it runs completely empty; the ink is matched to the original color.

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?

Keep bottles sealed and upright at room temperature, out of direct sunlight, and use within about 12 months of opening.

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.