Epson
Compatible Epson 786XL T786XL420 Yellow Ink Cartridge
- Page Yield:
- Up to 2,000 pages (ISO/IEC 24711)
- Shipping:
- Calculated at Checkout
- Page Yield:
- Up to 2,000 pages (ISO/IEC 24711)
- Shipping:
- Calculated at Checkout
- Compatible Printers
- Specifications
- SKU:
- CS-EP-786-YXL
- Condition:
- New Compatible
- OEM Part #:
- T786XL420-S
- Color:
- Yellow
- Ink Type:
- Pigment
- Page Yield:
- Up to 2,000 pages (ISO/IEC 24711)
- Chip:
- New compatible chip
- Warranty:
- Lifetime Warranty
- Returns:
- 1-Year Free Returns
- Description
- Reviews
Our compatible T786XL420-S carries DURABrite Ultra pigment yellow ink rated up to 2,000 pages (ISO/IEC 24711), the high-capacity tier of the 786 family. These are individual cartridges — the PrecisionCore print head stays in the printer — so a low yellow is fixed by replacing this cartridge alone, not the set.


The code discipline on this page matters. The standard-capacity sibling of this cartridge is T786420-S and the XL code is T786XL420-S; both tiers fit the same slots, and our shelf stocks the XL tier, including T786XL120-S black (up to 2,600 pages), T786XL220-S cyan (up to 2,000 pages), T786XL320-S magenta (up to 2,000 pages). No page yield is printed for the standard tier here, because its official yield could not be verified in Epson's US documentation — a seller figure is not treated as proof. A separate warning: T788XXL codes belong to only four of this family's models and are not this cartridge, not an upgrade for it, and not part of our range. This cartridge carries a new compatible chip. If your printer's firmware has been updated, recognition issues can occasionally occur — reseat the cartridge and restart the printer before assuming it is at fault.
It fits all six verified 786-family models — WF-4630, WF-4640, WF-5110, WF-5190, WF-5620 and WF-5690. The T788XXL boundary is worth repeating from the fit side: WF-4630 and WF-4640 do not take XXL cartridges at all, and even on the four models that do, this XL cartridge is the product on this page. Nothing here fits EcoTank bottle printers or other Epson cartridge families. Covered by our lifetime warranty, with free returns for the first year.
Shop the Epson 786 family: T786XL120 Black Ink Cartridge · T786XL220 Cyan Ink Cartridge · T786XL320 Magenta Ink Cartridge · Set of 4 BCMY Ink Cartridge
Browse by series: WorkForce
Frequently Asked Questions
Will this cartridge be recognised by my printer?
This cartridge carries a new compatible chip. If your printer's firmware has been updated, recognition issues can occasionally occur; reseat the cartridge until it clicks and restart the printer before assuming the cartridge is faulty. We do not promise recognition under every future firmware version — a recognition problem that cannot be cleared is covered by our lifetime warranty.
My printer says the cartridge is not recognised. What now?
Power the printer off, remove the cartridge, check the chip contacts are clean and dry, reseat it firmly, and power back on. If a firmware update came just before the message, that is the likely trigger — contact us and we will work through it under the lifetime warranty. Turning off automatic firmware updates is the practical step many offices take with compatible cartridges.
What ink is inside?
DURABrite Ultra pigment ink — the ink type Epson specifies for the whole 786 family in all four colours. Pigment ink is what gives these WorkForce Pro printers their smudge-, water- and fade-resistant documents.
Is this a genuine Epson cartridge?
No — it is a Clever Supplies compatible cartridge built to the T786XL420-S specification and labelled compatible on the box and on this page. It is not manufactured by Epson.
I print almost entirely in black. Why is yellow still falling?
These printers draw a small amount of ink from every cartridge during printing and cleaning cycles to keep the permanent PrecisionCore print head charged and clear. Colour cartridges therefore fall slowly even on black-only work, and a spent colour must be replaced before printing resumes.
Can I use a T788XXL cartridge instead of this one?
No, and the distinction matters. T788XXL is a separate code set that fits only four models in this family — WF-5110, WF-5190, WF-5620 and WF-5690 — and never the WF-4630 or WF-4640. We do not sell a compatible T788XXL, and this T786XL420-S page makes no XXL claim.
How much ink is in it, in millilitres?
We do not publish a figure: Epson's official documentation for this family does not give a millilitre volume that we could verify, so the Volume field is left blank rather than filled with a reseller's number. The verifiable figure is the ISO page yield.
How do I install it?
Remove the spent cartridge for this colour, unpack the new one only when you are ready, do not touch the chip contacts, press the cartridge into its colour holder until it clicks, close the cover, and let the printer charge the ink before printing.
How should I store a spare?
Sealed in its vacuum pack, upright, at room temperature and out of direct sunlight, and opened only on install day. No specific shelf-life figure is published for this product, so none appears in its specifications.
Single cartridge or the Set of 4?
The single when only this colour is low. The Set of 4 (all XL) resets every position at once and costs less than the four singles together. Both carry the lifetime warranty, with free returns for the first year.
How many pages does the T786XL420 print?
Up to 2,000 pages, Epson's published rating for the genuine XL cartridge on the ISO/IEC 24711 pattern. Your mileage follows coverage and cleaning cycles — text work tracks the rating most closely.
Is this the standard 786 or the 786XL?
The XL — the high-capacity tier. Its code is T786XL420-S; the standard cartridge for this colour is T786420-S, and the two tiers share the same slot in every model on this page. We stock the XL tier, and we do not print a yield for the standard tier because its official US figure could not be verified.


