3D Printing InfoBuild volume
25 x 21 x 21 cm = 250 x 210 x 210 mm (manufacturer figure)
Advertised dimensions; check usable space and variants.
Original Prusa i3 MK3S+
The long-running 8-bit Prusa i3 bed-slinger with EINSY RAMBo electronics and a SuperPINDA inductive probe, now sold only as a 10th Anniversary Edition.
Architecture reference
Start here
Explore this printer At a glance
Nozzle temperature
300 C claimed max nozzle temperature
Published limits; hardware and firmware limits may differ.
Sources & dates
Price snapshot
$1,199.00 assembled, $899.00 as a kit, for the 10th Anniversary Edition on prusa3d.com, Aug 2026. This is above the price the standard MK3S+ sold at, so do not read it as the MK3S+ street price
Dated listing, not a live offer. Read the configuration and region.
Sources & dates
A closer look
Full specifications inside each chapterHardware, software & ownership
Understand the hardware, explore compatible changes and find a diagnostic starting point when something goes wrong. Expand the specification sections for every recorded value, condition and original reference.
Machine & motion
Dimensions, construction and the hardware that moves the print.
Model, variants & pricing4 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Manufacturer & exact marketed model name (verify the exact product identity first) | Original Prusa i3 MK3S+. The only version still listed in Aug 2026 is the "Original Prusa i3 MK3S+ 10th Anniversary Edition" | 1 source |
| Street price (USD; dated snapshot per entry) | $1,199.00 assembled, $899.00 as a kit, for the 10th Anniversary Edition on prusa3d.com, Aug 2026. This is above the price the standard MK3S+ sold at, so do not read it as the MK3S+ street price | 1 source |
| Variants & sibling models — and how to tell them apart (spec-contamination risk) | Only the 10th Anniversary Edition remains on sale; the standard MK3S+ is gone from Prusa's printer listing. Two official upgrade paths change the machine substantially and are frequently confused with it: MK3.5 (xBuddy board and new LCD, keeps the MK3 extruder) and MK3.9 (adds the Nextruder). A caution on Prusa's own pages: the "Awards & Press Reviews" paragraph about the MK3S is reproduced verbatim on the MINI+ product page, so award text found on a Prusa page does not necessarily belong to the printer on that page | 4 sources
|
| Market position: superseded? successor announced? | Superseded by the MK4/MK4S line. Prusa cut MK3S+ prices at the MK4 launch in March 2023 and said it would keep selling the MK3S+ at a lower price and hold spare parts in stock |
Size, frame & enclosure5 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Build volume X×Y×Z (mm) — advertised vs actually usable | 25 x 21 x 21 cm = 250 x 210 x 210 mm (manufacturer figure) | 1 source |
| Machine footprint (mm) & clearance needed (cable/spool overhang) | 500 x 550 x 400 mm (X x Y x Z), without the spool holder | 1 source |
| Net weight (kg) | 7 kg (without spool) | 1 source |
| Frame construction & material | Cut aluminium frame - Prusa's MK4 announcement contrasts "the cut aluminum frame we used so far" with the MK4's new die-cast frame | |
| Enclosure: open / enclosed; panel material; door/lid | Open frame; the Original Prusa Enclosure is an optional separate product |
Motion system2 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Kinematics (bedslinger i3 / CoreXY / other) | Cartesian i3 bed-slinger. Prusa's MK4 announcement notes the MK3S+ Y-axis profiles and heatbed were among the few parts carried into the MK4 | |
| Stepper drivers (exact model e.g. TMC2209; UART/SPI; sensorless homing?) | Trinamic 2130 drivers at 256 microstepping on the EINSY RAMBo 8-bit board, co-developed with UltiMachine; sensorless homing on X and Y | 1 source |
Speed & acceleration1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Max travel speed | "200+ mm/s" max travel speed (manufacturer figure, no measurement basis given) | 1 source |
Printing system
Extrusion, heating, leveling and material handling.
Extruder1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Type (direct drive / bowden) & design name | Direct drive with Bondtech gears and an E3D V6 hotend | 1 source |
Motion continues after extrusion stops
The manufacturer separates heat creep from other clogs. Check the feed path, heatsink cooling and enclosure conditions, then follow the relevant unclogging procedure rather than assuming heat creep is the cause.
Applies to: MK3S+ is explicitly within the article’s scope; modified hotends require their own assembly and firmware checks.
Official troubleshooting Sources & dates
- Prusa MK3S+ extrusion-stoppage and heat-creep diagnosis · Checked 2026-10-20
Revo Six anti-rotation cover or body
The creator’s replacement geometry prevents a fitted Revo Six from turning in its mount; the body and cover are alternatives, so use one.
Applies to: MK3S+ with the Revo Six conversion already installed; this is not a stock V6 requirement.
Creator listing Sources & dates
- Surfalex2000: MK3S+ Revo Six anti-rotation mount STL · Checked 2026-10-20
E3D Revo Six hotend conversion
The 24 V Revo assembly changes the nozzle/heater system and allows the Revo nozzle-change workflow. Install its matching thermal-model firmware as part of the conversion.
Applies to: MK3/MK3S/MK3S+ kit; choose 24 V for a stock MK3S+ and match the actual Revo heater version.
Manufacturer documentation Sources & dates
- E3D Revo Six MK3/S/+ installation and firmware requirements · Checked 2026-10-20
Hotend & nozzle1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Max nozzle temp claimed AND firmware max temp limit (both values) | 300 C claimed max nozzle temperature | 1 source |
Build plate & heating2 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Max bed temp claimed AND firmware limit | 120 C max heatbed temperature | 1 source |
| Bed surface (material, texture, coating), single/double-sided | Removable magnetic spring-steel sheets in several finishes; heatbed with cold-corner compensation | 1 source |
Leveling & Z-offset1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Auto bed leveling: probe technology (inductive / strain gauge / load cell / touch probe) | SuperPINDA inductive probe (Prusa's temperature-drift-free replacement for the original PINDA), driving automatic mesh bed levelling and a self-test routine | 1 source |
MMU3 with the MK3S+ installation kit
The multi-material unit requires printer-specific extruder changes and the Einsy/Rambo cable. Its profiles differ from the CORE/MK4 MMU3 workflow.
Applies to: MK3S+ MMU3 kit and matching firmware/profiles; moving the unit to an xBuddy printer requires different parts and wiring.
Manufacturer documentation Sources & dates
- Prusa MMU3 model, cable, extruder and G-code compatibility · Checked 2026-10-20
Filament handling1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Filament runout sensor (type, location) | IR filament sensor built in, supporting filament auto-loading; the print pauses when filament runs out | 1 source |
Supported materials1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Officially supported filament list | PLA, PETG, ASA, ABS, PC, CPE, PVA/BVOH, PVB, HIPS, PP, Flex, nGen, Nylon, carbon-filled, woodfill and other filled materials | 1 source |
Software & workflow
Firmware, controls, connections and calibration.
Electronics & power3 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Mainboard model & MCU (exact chip markings if teardowns exist) | EINSY RAMBo 8-bit board, co-developed with UltiMachine | 1 source |
| Input voltage (110/220 V, switch or auto) | Custom Delta PSU with hardware-based power panic | 1 source |
| Total rated power draw | Power consumption 80 W on PLA settings, 120 W on ABS settings | 1 source |
Hotend-specific Prusa firmware variants
Prusa documents separate firmware configurations for third-party hotends, including E3D Revo. Match the hotend and heater configuration so the thermal model reflects the installed hardware.
Applies to: MK3S+ stock V6 and Revo builds are different; use the exact Revo heater-power variant if that upgrade is installed.
Manufacturer documentation Sources & dates
- Prusa firmware hotend variants and thermal-model build guidance · Checked 2026-10-20
- E3D Revo Six MK3/S/+ installation and firmware requirements · Checked 2026-10-20
Firmware & openness1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Firmware base & current version (Klipper fork / Marlin fork / proprietary) | prusa3d/Prusa-Firmware on GitHub, GPL-3.0, whose README states it is "proudly based on Marlin 1.0.x" and covers the MK3S/MK3/MK2.5S/MK2.5 line; last pushed August 2025. Updated over USB from a PC | 1 source |
Connectivity, display & camera1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| WiFi (band/standard), Ethernet, USB ports, SD/flash-drive | SD card (16 GB card included); Ethernet and Wi-Fi only via an optional Raspberry Pi | 1 source |
Safety, support & testing
Published safeguards, support terms and independent evidence.
Safety1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Thermal runaway protection (verify in firmware source if at all possible) | Prusa shipped Thermal Model protection to the MK3 line as a firmware update shortly before the MK4 launch; the firmware is open-source and auditable |
Support & ecosystem1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Warranty length & support reputation (evidence, not vibes) | 2-year warranty for consumers in the EU, Liechtenstein, Switzerland, Norway and Iceland; 1 year for EU enterprises and 1 year for the rest of the world, which includes the United States. A printer bought from a reseller or privately carries 1 year from the original delivery date and is handled by the reseller. Prusa advertises 24/7 chat and e-mail support in seven languages | 2 sources
|
Read with context
Sources & notes
How to read this guide
This guide presents the catalog’s sourced record for this exact model. Source dates belong to each reference; a page update does not mean every specification has been rechecked.
Prices are dated listing snapshots, with configuration, regional and sale conditions. They are not current offers. Unknown values remain unfilled.
Firmware, variants and available accessories can change. Read the original reference before making a purchase or planning a process.
Catalog references7 sources
- Original Prusa i3 MK3S+ 10th Anniversary Edition product page (Technical Parameters + Full Features List) · 2026-08 · vendor
- Original Prusa MINI+ Semi-assembled 3D Printer product page (Technical Parameters + Full Features List, January 2025 Edition) · 2026-08 · vendor
- Prusa blog - Original Prusa MK4 is here (published 29 March 2023), including the MK4 specification table and launch prices · 2026-08 · doc
- Prusa 3D printers category listing with live e-shop prices, Aug 2026 · 2026-08 · vendor
- GitHub - prusa3d/Prusa-Firmware (MK3 line, GPL-3.0, based on Marlin 1.0.x) · 2026-08 · doc
- Prusa Knowledge Base - Warranty · 2026-08 · doc
- Original Prusa MK4S 3D Printer product page (Technical Parameters + CORE One+/MK4S/XL comparison table) · 2026-08 · vendor
Ownership research & coverage
Firmware, modifications and troubleshooting links are checked against the model and stated hardware or firmware revision. A creator’s compatibility claim is not a fit test by this site. Official troubleshooting describes a diagnostic route; individual reports do not establish a failure rate.
- Prusa firmware hotend variants and thermal-model build guidance · Checked 2026-10-20
- E3D Revo Six MK3/S/+ installation and firmware requirements · Checked 2026-10-20