Are Avery AP4.4, AP5.4, XLP504, and XLP514 Printheads the Same?
Avery AP4.4, AP5.4, XLP504, and XLP514 are closely related printer families, but their printheads are not all the same part. Based on NOVEXX Solutions documentation and spare-parts cross references, the most important rule is simple: the printhead must match the printer resolution and the correct assembly version. In the market, the 203 dpi head is commonly identified as A4031, the 300 dpi head as A4431, and the XLP 51x family also supports a 600 dpi option on certain models.
1) The short answer
These four model names do not mean one single universal printhead. Instead, they point to a compatibility family with different resolution variants. AP4.4 and AP5.4 are documented as printer models in Avery's manuals, while NOVEXX's XLP 51x family is officially described as supporting 200, 300, and 600 dpi print resolutions. That means the right replacement is determined first by dpi, then by the exact printer build.
2) What is the real difference?
The biggest difference is print resolution.
The commonly used replacement heads are:
- A4031 for 203 dpi / 8 dots per mm, cross-listed for AP4.4, AP5.4, XLP504, and XLP514.
- A4431 for 300 dpi, also cross-listed for the same model family in multiple parts listings.
- N100040 for 600 dpi on XLP514 listings, showing that the higher-resolution XLP514 configuration uses a different head option.
In practical terms, 203 dpi is better for standard barcodes, shipping labels, and general-purpose printing, while 300 dpi gives finer text and sharper graphics. The 600 dpi XLP514 option is for much higher-detail output and is not interchangeable with the 203/300 dpi versions. This is an inference based on the documented resolution options and the separate part numbers used for each resolution.
3) Can they be used interchangeably?
Sometimes yes, but only within the correct resolution family and hardware variant.
Multiple parts listings and reseller catalogs cross-reference A4031 and A4431 across AP4.4, AP5.4, XLP504, and XLP514, which strongly suggests that these printer families share a closely related printhead mounting ecosystem. However, that does not mean every head is universally swappable. The printer must still match the correct dpi, and in some cases the assembly may be sold with or without a mounting plate or other fixture details.
So the safe rule is:
203 dpi printer → 203 dpi head
300 dpi printer → 300 dpi head
600 dpi printer → 600 dpi head
4) Why do sellers list all four models together?
Because the market often groups them by the same replacement-head ecosystem. That is why many parts suppliers list one product page for AP4.4, AP5.4, XLP504, and XLP514 together. The listings reflect practical compatibility, but the official NOVEXX documentation still shows that the printer family supports different resolutions, so the exact matching part matters.
5) Buying advice for replacement
Before ordering a replacement printhead, confirm three things:
First, check the printer model.
Second, check the installed resolution on the machine.
Third, confirm whether your head is the standard head or a specific assembly version. The safest approach is to match the original part number on the old head or on the printer's spare-parts list. NOVEXX's own documentation emphasizes that the XLP 51x family is built around different dpi configurations, and the printhead is an important serviceable component of the open print module.
6) Final conclusion
AP4.4, AP5.4, XLP504, and XLP514 are not one single identical printhead.
They belong to a related Avery/NOVEXX printer family, and the commonly used replacement heads are grouped by dpi: A4031 for 203 dpi, A4431 for 300 dpi, and 600 dpi on XLP514 uses a different option. In real purchasing practice, AP4.4/AP5.4/XLP504/XLP514 are often cross-referenced, but the printhead must still match the printer's resolution and exact build.
