FFFMajkluss / CC BY-SA 4.0 / Wikimedia CommonsPrusa Original Prusa MK4
MK3 successor featuring a load-cell Nextruder and 32-bit xBuddy electronics.
Source reviews: 2026-10-16.
Specifications are reported claims, not independent test results.
The details that matter.
Published specifications for this model. Follow a field's source for its configuration and measurement conditions; older fields refer to the profile's reference list.
| Introduction year | 2023 |
|---|---|
| Model family | Original Prusa i3 |
| Process | FFF |
| Build envelope (X × Y × Z) | 250 × 210 × 220 mm |
| Nominal box volume | 11.55 L · calculated from the envelope |
| Enclosure | Not verified |
| Maximum nozzle temperature | Not verified |
| Materials cited in this profile | Not verified |
| Manufacturer listing status | Unknown |
| Regional stock and price | Check the manufacturer |
| Market grouping | Desktop · editorial grouping |
Technical specifications
| Controller | 32-bit STM32 xBuddy |
|---|---|
| Extrusion System | Nextruder with 10:1 planetary gearing |
| First Layer Calibration | Load-cell nozzle probing |
| Bed Temperature (°C) | 120 |
| XY Motor Step Angle | 0.9 degrees |
| Z Rod Diameter (mm) | 10 |
| Display | 3.5-inch color LCD |
| Connectivity | Ethernet, Wi-Fi module and USB flash drive |
| Power Failure Recovery | Power Panic |
| Tool Service | Quick-swap hotend and LoveBoard breakout electronics |
| Multi Material Option | MMU3 |
Nextruder and automatic first layer
The MK4 uses the nozzle as a probing point through a load cell. Its removable hotend and local breakout board simplify nozzle and component replacement.
Architecture and upgrades
The 32-bit xBuddy replaces the MK3 family’s EINSY controller. The manufacturer distinguishes a full MK4 upgrade from MK3.5 and MK3.9 packages, which retain different hardware.
Published nozzle-temperature discrepancy
The MK4 launch article lists 300°C while the later MINI+ comparison table gives 290°C for MK4. The maximum is left unresolved rather than selecting one conflicting manufacturer value.
Introduced in 2023.
Announced March 29, 2023; assembled units were shipping at announcement.
Family: Original Prusa i3 · Historical model
What changed
- Load-cell automatic first-layer calibration
- 32-bit xBuddy control board
- Quick-swap nozzles
Read this with the specifications
Launch specifications verified. Hotend maximum omitted because later manufacturer comparison tables differ. MK4S superseded the base MK4 in 2024.
A larger nominal envelope does not establish better print quality. Fit depends on the configuration, usable area, supports, and orientation.
INDUSTRY F340
Manufacturer-issued brochure preserved by distributor Multi3DPrint; original manufacturer links are no longer available.