Prusa Research • 250 x 210 x 210 mm
Original Prusa i3 MK3S+

Original Prusa i3 MK3S+

Prusa Research Released: November 24, 2020
Build Volume
250 x 210 x 210 mm
Print Area
Year
2020
Released
Kinematics
Cartesian
Motion System

Printer Highlights

Max Speed : 200 mm/s
Max Hotend Temp : 300°C
Chamber Enclosure : Open Frame
Auto-Leveling : Yes

About Original Prusa i3 MK3S+

Original Prusa i3 MK3S+ is an open-frame Cartesian FDM 3D printer with a 250 × 210 × 210 mm build volume, up to 200 mm/s print speed, a 300°C hotend, a 120°C heated bed, a direct drive extruder, auto bed leveling, and up to 5-color printing support.

Last updated: November 11, 2026

General Information of Original Prusa i3 MK3S+

Printer Name

Original Prusa i3 MK3S+

Brand

Prusa Research

Series

Original

Release Date

November 24, 2020

Build Volume & Chassis of Original Prusa i3 MK3S+

Build Volume

250 x 210 x 210 mm (9.8 x 8.3 x 8.3 in)

Build Volume (X)

250 mm (9.8 in)

Build Volume (Y)

210 mm (8.3 in)

Build Volume (Z)

210 mm (8.3 in)

Enclosed Chamber

No

Frame Type

Rigid dural aluminum frame with aluminum profile Y-carriage

Machine Size

500 x 550 x 400 mm (19.7 x 21.7 x 15.7 in)

Machine Weight

7 kg (15.4 lbs)

Motion System & Kinematics of Original Prusa i3 MK3S+

Kinematics Type

Cartesian

Motion Axis Type

Dual leadscrew stepper motors with trapezoidal nuts

Kinematics Layout

Bedslinger (Cartesian-XZ-Head)

Rail System

Misumi Precision Rods with LM8UU Bearings and Metal Clips

Dual Z-Axis

Yes

Extruder & Toolhead of Original Prusa i3 MK3S+

Extruder Type

Direct Drive

Toolhead Count

1

Filament Diameter

1.75 mm

Nozzle Diameter

0.4 mm

Nozzle Material

Brass

Supported Nozzle Diameters

0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm

Max Nozzle Temp

300°C

Multi-Material Ready

Yes

Max Colors / Materials

5 Colors

Multi-Material System

Original Prusa MMU3 (Optional Add-on, Up to 5 Colors)

Bed & Thermal System of Original Prusa i3 MK3S+

Build Plate Type

MK52 magnetic heatbed with removable double-sided PEI spring steel sheet

Heated Bed

Yes

Max Bed Temperature

120°C

Actively Heated Chamber

No

Automation & Electronics of Original Prusa i3 MK3S+

Auto Bed Leveling

Yes

Leveling Sensor Type

SuperPINDA induction sensor 9-point automatic mesh bed leveling

Filament Runout Sensor

Yes

Power Loss Recovery

Yes

Input Shaping (Resonance)

No

Built-in Camera

No

First Layer LiDAR

No

Part Cooling Fan

High-Speed Blower Fan

Hotend Fan

Axial Cooling Fan

Software & Connectivity of Original Prusa i3 MK3S+

Firmware

Prusa Marlin

Compatible Slicers

PrusaSlicer

Connectivity

SD card, USB Type-B

Display Screen

Monochrome LCD with rotary encoder knob

Input Voltage

100-240V AC

Special Features

SuperPINDA temperature-independent leveling sensor, High-grade Misumi bearings and precision rods, Trinamic silent drivers with crash detection, E3D V6 all-metal hotend

Special Note on Original Prusa i3 MK3S+

Prusa Research ended Original Prusa i3 MK3S+ kit production on February 29, 2024 (assembled inventory sold through while supplies lasted); spare parts and MK3.5S/MK3.9S upgrade kits remain supported.

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