HP 738 300-ml Black DesignJet Ink Cartridge (498N8A)

The machines that take 498N8A

HP assigns this tank to the DesignJet T850, T850 MFP, T870 and XT870. The XT950 family sits outside the 738 range and takes 738M parts instead. Both ranges appear against the T870 and XT870 in HP’s own data, so on those two machines match the number already in the slot.

One black, and only one

Four colors cover this platform and just one of them is black — there is no second black part number in the 738 catalog to weigh up against it. That means every job draws its black from this tank, and on school work — signage, headings, text-heavy displays — it empties first.

The cheapest black in the range, per milliliter

$224.95 for 300 ml is $750 a liter. The 130 ml black, part 498N4A, is $117.95 — $907 a liter, so the small tank costs 21% more for every milliliter in it. Read the other way round: buying black at 300 ml takes 17% off the cost of every milliliter. One more number is worth knowing: the 738M 300 ml black, 498Q0A, is priced identically at $224.95, so at this size the choice between the two ranges is not a price decision at all.

The three numbers nearest this one

498N7A, one digit below, is 130 ml yellow — a different color and a different size. 498Q0A is the 738M black at this volume, with an integrated printhead; HP lists it against the T870 and XT870 as well as the XT950 family. And the 300 ml colors in this range do not continue the 498N sequence; they start again at 676M6A.

The complete 738 set

Eight part numbers cover this platform. At 130 ml: black 498N4A, cyan 498N5A, magenta 498N6A, yellow 498N7A, each $117.95. At 300 ml: black 498N8A, cyan 676M6A, magenta 676M7A, yellow 676M8A, each $224.95. Four colors, two sizes, no gray and no chromatic inks. Both volumes are listed against the same four machines, so tell us how you want each color sized and we will hold your standing order that way.

Specifications

Free shipping and school POs on every ink order. Not sure which part fits your machine? Call 866-788-7900 or see all genuine HP parts by number.

Questions schools ask about this part

Do we need to buy a printhead at the same time?

Not with this part. The 738 cartridges carry ink only; the printhead is a separate component already fitted in the printer.

Can we order 300 ml and 130 ml tanks on the same purchase order?

Yes. Both volumes are listed against the same four machines, and a common pattern is 300 ml for black, which usually moves fastest, alongside 130 ml for the three colors. Tell us how you want each color sized and we will hold your standing order that way. If you want it confirmed that mixed volumes are supported inside one machine, call us on 866-788-7900 and we will check with HP before you order.

How many posters will one tank print?

We do not publish a figure for this part. Output depends on how much ink each design lays down and on the media in the printer, so any average would mislead. The front panel shows remaining ink per color, and that reading across a few weeks of your own work is a better planning number than a published one.