PM42 vs PM43 Printhead: Same Hardware, Different Part Numbers?
Many users notice that PM42 printhead part numbers and PM43 printhead part numbers are not always the same, even though market information confirms that the two printheads are interchangeable.
This often leads to confusion during maintenance, replacement, or bulk procurement.
In fact, this is a common practice in industrial printer manufacturing, and it does not mean the printheads are incompatible.
Why Do PM42 and PM43 Printheads Have Different Part Numbers?
Although PM42 and PM43 printers share a very similar mechanical design, Honeywell (Intermec) assigns different OEM part numbers for several practical reasons.
1. Different Resolution Variants (DPI)
The most important factor is print resolution.
203 dpi
300 dpi
406 dpi
Each resolution uses a different heating element density, which requires a unique part number.
A 203 dpi printhead cannot replace a 300 dpi printhead, even if the printer model is the same.
2. OEM Version Control and Product Revisions
OEM manufacturers often update printheads due to:
Material optimization
Supplier changes
Process improvements
Even when the external dimensions remain identical, a new revision may receive a new part number for traceability and quality control.
3. Assembly vs Bare Printhead
Some part numbers refer to:
Bare printhead only
Printhead assembly (with bracket, cable, or thermal protection layer)
These variations are managed under different PNs, despite being functionally interchangeable.
4. OEM, Distributor, and Aftermarket Numbering Systems
You may encounter:
OEM original part numbers
Distributor internal SKUs
Third-party compatible part numbers
This is why a single PM42/PM43 compatible printhead can appear under multiple part numbers in different catalogs.
5. Regional and Service Channel Management
In some cases, OEMs assign different part numbers for:
Different regions
Authorized service programs
Warranty and after-sales tracking
This affects inventory management but not compatibility.
Common OEM Replacement Printheads for PM42 / PM43
| Resolution | OEM Part Number | Compatible Models |
|---|---|---|
| 203 dpi | 710-129S-001 | PM42 / PM43 |
| 300 dpi | 710-179S-001 | PM42 / PM43 |
| 406 dpi | 710-230S-001* | PM42 / PM43 (limited markets) |
* Availability may vary by region.
| Resolution | OEM Part Number | Compatible Models |
|---|---|---|
| 203 dpi | 50126706-001 | PM42 |
| 300 dpi | 50126707-001 | PM42 |
How to Choose the Correct PM42 / PM43 Printhead
When replacing a printhead, do not rely on the printer model name alone. Always verify:
- Print resolution (DPI)
- Print width
- Connector position and cable orientation
- Whether the printhead is bare or assembled(with or without bracket)
For B2B buyers and distributors, confirming these parameters is more reliable than matching part numbers only.
Conclusion
Different part numbers for PM42 and PM43 printheads do not indicate incompatibility.
They reflect OEM management practices related to resolution, revision control, assembly type, and sales channels.
As long as the DPI and physical specifications match, PM42 and PM43 printheads are fully interchangeable, making sourcing more flexible for industrial users and bulk buyers.
