SKU:

HP4345

Printer Brand:

Hewlett Packard

OEM Number:

Q5945A

Ink Color:

Black

Page Yield:

20,000 Pages

Printer Type:

Laser Cartridge

Condition:

New Compatible

Frequently Asked Questions

The cartridge we pulled out is stamped Q5945A. Is this that unit?

It is. Q5945A is the full part number, 45A is the short name the family goes by, and this listing is a single black cartridge at $56.53 rated for 20,000 pages. If the outgoing unit carries either code, the box in your hand is the right one.

Why does a base 4345 still get through toner so quickly?

Because the LaserJet 4345 was built as a department machine, not a personal printer. It sits where a whole team's printing, copying and incoming faxes land, and a 20,000-page rating is sized for exactly that workload rather than for one desk.

Do copies draw from the same cartridge as prints?

Yes — anything the machine puts on paper uses this toner, whether the job arrived as a print file or as an original on the glass. Scanning is the exception: a scan sent to email or a folder never touches the cartridge, so scan-heavy days cost nothing.

How can the remaining toner be checked before a big week?

Print the supplies status page from the control panel or open the device's web page. The percentage shown there counts prints and copies together, and checking it on a Friday is the simplest way to know whether a spare needs to be on the shelf for Monday.

Output is light down the left side only. Is the cartridge done?

Probably not. Toner settles toward one side as a cartridge empties unevenly. Take it out, rock it gently side to side a few times and put it back — density usually evens out. A page that is light everywhere is the real end-of-life sign.

What backs this purchase?

A 1-year warranty and 1-year free returns, set out on our shipping & returns page. Stock ships from warehouses in IL, PA, GA, and CA, and our support team answers Monday–Friday, 9 AM–5 PM CST.

About This LaserJet 4345 Cartridge

This is the listing written for the plain 4345 — the anchor model of the family and the reference point the taller variants were built from. The cartridge itself is the family standard: one Q5945A black unit, sold under our HP compatible range, with no configuration choices to make before ordering.

Offices tend to buy it as a standing line item rather than an emergency purchase: one code on the reorder sheet, a known page rating, and a cartridge that can be swapped through the front in about a minute when the status page finally says so.

LaserJet 4345mfp, LaserJet M4345 and LaserJet 4345: different badges, one common cartridge in the 45A (Q5945A). Buyers comparing runs will also want to see the maximum-yield 45X (Q5945X) single cartridge and the standard 45A (Q5945A) single cartridge.