Hewlett Packard
CS Compatible Replacement for HP LaserJet 4345mfp Toner Cartridge Black
- Page Yield:
- 20,000 Pages
- Availability:
- In Stock
- Shipping:
- Free Shipping
- Page Yield:
- 20,000 Pages
- Availability:
- In Stock
- Shipping:
- Free Shipping
- Compatible Printers
- LaserJet 4345
- LaserJet 4345mfp
- LaserJet 4345x mfp
- LaserJet 4345xm MFP
- LaserJet 4345xs MFP
- LaserJet M4345 MFP
- LaserJet M4345x MFP
- LaserJet M4345xm MFP
- LaserJet M4345xs MFPi>
- HP Q5945A
- LaserJet 4345X
- LaserJet 4345XM
- LaserJet 4345XMFP
- LaserJet 4345XMMFP
- LaserJet 4345XS
- LaserJet 4345XSMFP
- LaserJet M4345
- LaserJet M4345MFP
- LaserJet M4345X
- LaserJet M4345XM
- LaserJet M4345XMFP
- LaserJet M4345XMMFP
- LaserJet M4345XS
- LaserJet M4345XSMFP
- Specifications
- SKU:
- HP-4345mfp
- Printer Brand:
- Hewlett Packard
- OEM Number:
- Q5945A
- Ink Color:
- Black
- Page Yield:
- 20,000 Pages
- Printer Type:
- Laser Cartridge
- Condition:
- New Compatible
- Description
- Yields up to 20000 pages
- Manufactured specifically for HP printers compatible HP toner cartridges offer fast hassle-free printing
- HP LaserJet 4345mfp Toner Cartridge Black deliver consistent yields and provide high-quality results
- Streamline your printing needs with the time-saving reliability of compatible HP LaserJet toner cartridges
- And saving time saves money the true value is compatible HP LaserJet toner cartridge technology
- Packaging: Each
- Compatible with: HP LaserJet 4345x 4345xm M4345 M4345x M4345xm M4345xs etc.
- Cartridge yield type: Standard
- Print technology: Laser
- Page yield footnote: Approximate average yield based on ISO/IEC 19752 actual yield varies considerably based on content of printed pages and other factors
- Consistent quality no problems the HP toner cartridge just works so well that the technology has earned HP #1 rated reliability
- Fewer interruptions keep your workgroups productive save time and lower your overall printing costs
- HP LaserJet toner cartridge includes the toner and imaging drum in one supply
- To minimize interruptions HP smart technology sends alerts when supplies are low
- Simply choose your preferred reseller and place your order through HP suresupply
- Designed to work with the printer to optimize print quality and reliability with every print
- Toner cartridges deliver consistent yields and provide high-quality results
- Operating temperature range: 10 - 32.5 deg C storage temperature range: -20 - 40 deg C storage humidity range: 10 - 90% RH
- Includes: Toner cartridge Recycling guide
- Warranty: Warranted to be free from defects in materials and workmanship
- Reviews

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Compatible HP LaserJet 4345mfp Toner Cartridge Black produce superior quality and consistency for a wide array of printing needs
HP LaserJet 4345mfp Toner Cartridge Black is designed to deliver the best image quality and reliable printing. Toner cartridge is compatible with HP LaserJet 4345x 4345xm M4345 M4345x M4345xm M4345xs etc. and yields up to 20000 pages.
Features:
Frequently Asked Questions
The machine's name ends in "mfp" — does it take a different cartridge?
No. The LaserJet 4345mfp runs on the same Q5945A black cartridge as the rest of the family — the 45A, one unit at $56.53, rated for 20,000 pages. The suffix describes the machine's functions, not a separate supply line.
Our 4345mfp mostly makes copies. Does that change cartridge life?
Copies spend toner exactly the way prints do, page for page. A copy-heavy mfp can work through a cartridge while its print queue looks modest, so the supplies percentage — not the print count — is the honest measure of what is left.
What about the scanning side of the machine?
Scanning spends nothing. Originals read on the glass or through the feeder and sent on as files never touch the toner. Only output on paper — prints, copies and incoming faxes — draws from this cartridge.
Prints look fine but copies are coming out gray. Cartridge or glass?
That split points at the glass, not the cartridge: a dirty scanner bed or feeder strip grays copies while prints stay clean. If both were fading together, toner would be the suspect. Clean the glass first; it costs nothing.
How is a swap done on this model?
Open the front of the machine, slide the old unit out and the new one in until it seats. It is a one-minute, tool-free job, and the machine is back to copying as soon as the cover closes.
What terms cover the order?
A 1-year warranty and 1-year free returns, spelled out on our shipping & returns page. We hold stock in warehouses in IL, PA, GA, and CA, and support runs Monday–Friday, 9 AM–5 PM CST.
About This LaserJet 4345mfp Cartridge
This listing exists because buyers search by the name on the front of the machine — and on this one the name ends in "mfp". Underneath, it is the family-standard 45A black cartridge in our HP compatible range, sold as a single unit with the family's standard page rating.
For a machine whose day is mostly walk-up copying, the useful habit is simple: glance at the supplies gauge when the low warning first appears and order then, so the replacement is on the shelf before the copies start to fade.

