MK3_Compatible_Parts

This page lists sources and part numbers for various replacement parts for the Original Prusa i3 MK3 printer.

Electrical Components

Part Name	Used In / Description	Manufacturer Part Number	Source / Source Part Number
4-pin connector (body)	Keyed, 4-pin connector used on Einsy for connections to stepper motors.	Molex: 50-57-9404	Mouser: 538-50-57-9404 Digikey: WM2902-ND TME: MX-70066-0178
3-pin connector (body)	Keyed, 3-pin connector used on Einsy for connection to fan.	Molex: 50-57-9403	Mouser: 538-50-57-9403 Digikey: WM2901-ND TME: MX-70066-0177
2- pin connector (body)	Keyed, 2-pin connector used on Einsy for connections to thermistors and the Power Panic board.	Molex: 50-57-9402	Mouser: 538-50-57-9402 DigiKey: WM2900-ND TME: MX-70066-0176
Terminal / Pin for keyed connectors	Female terminals (pins) used in 4-pin and 3-pin keyed connectors on the Einsy board.	Molex: 16-02-0097	Mouser: 538-16-02-0097 DigiKey: WM2513-ND TME: MX-16-02-0097

Part Name	Used In / Description	Manufacture Part Number	Source / Source Part Number
X,Y,E stepper motor	X, Y, E axis	- LDO XYE motor drawing - LDO XYE motor specs	LDO-42STH38-1004A100CM-RevA-for-3D
Z stepper motor	Z axis	- LDO Z motor drawing - LDO Z motor specs	LDO-42STH34-1004L321E100CM-RevA-for-3D

Part Name	Used In / Description	Specification	Manufacture Part Number	Source / Source Part Number
Noctua fan	Hotend fan	- 5V - 0.05A - 4500 RPM - Size: 40x40x10 mm - Mounting hole spacing: 32x32 mm - Airflow: 8,2 m³/h (4.83 CFM) - Static Pressure: 1,78 mm H₂O	Noctua NF-A4x10 5V	Noctua website
5015 Blower fan	Nozzle fan	- 5V - 0.30A - 4500 RPM - Size: 50x50x15 mm - Mounting hole spacing: 38x43 mm - Airflow: 3.8 CFM	?	?

Part Name	Used In / Description	Specification	Manufacture Part Number	Source / Source Part Number
Magnets	Magnets for MK52 heated bed	- Neodymium Material Type: N35UH - Size: 20x6x2.3 mm - Hole depth in MK52: 2.5-2.7 mm - Maximum Operating Temp: 180°C	?	?

Part Name	Used In / Description	Specification	Manufacturer Part Number	Source / Source Part Number
Wrap Braided Cable Sleeve	MK52 Heated bed and X-axis stepper	- Material: Polyester - Diameter: 5mm - Length: 300mm	HellermannTyton: 170-01000	Conrad: 541298 AliExpress: Clone
Wrap Braided Cable Sleeve	Hotend assembly cable bundle	- Material: Polyester - Diameter: 13mm - Length: ?	HellernammTyton: 170-01002	Conrad: 540704
3mm nylon cable	Support for extruder cables	- Material: Nylon - Diameter: 3mm (not 2.85mm like nylon filament!) - Length: ?	?	?

Part Name	Used In / Description	Specification	Manufacturer Part Number	Source / Source Part Number
Delta PSU 24V 320W	Compatible PSU for MK3	24V 320W	Delta PMF-24V320WCAB	Delta website
Mean Well PSU 24V 320W	Compatible PSU for MK3	24V 320W	Mean Well SP-320-24	Mean Well website

Always get known brand from reliable source for those parts, they are critical and might be dangerous if not correctly manufactured.

Part Name	Used In / Description	Specification	Source / Source Part Number
115/230 VAC Cables	PSU	16 AWG or 1.5mm²
12/24 VDC Cables	PSU to Rambo/Einsy	14 AWG or 2mm²
Terminal Quick Connects Connector	Power plug, Power switch	- 16 AWG - Tab width: 6.35mm (according to your power plug and switch connectors) - Fully insulated	Digikey
Terminal Spade Connector 115/230 VAC	PSU (115/230 VAC)	- 16 AWG - Flanged terminal type - #6 Stud/Tab size - Insulated - Spade width: 6.35 to 8mm	Digikey
Terminal Spade Connector 12/24 VDC	PSU (12/24 VDC), Rambo/Einsy	- 14 AWG - Flanged terminal type - #6 Stud/Tab size - Insulated - Spade width: 6.35 to 8mm	Digikey
Terminal Ring Connector	Heated bed	- 14 AWG - M3 Stud/Tab size - Insulated - Spade width: 6.35 to 8mm	Digikey