This page lists sources and part numbers for various replacement parts for the Original Prusa i3 MK3 printer.
| 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 |
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| 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 |
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| 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: ? |
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| 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 | Manufacturer Part Number | 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 |