This page lists sources and part numbers for various replacement parts for the Original Prusa i3 MK3 printer. Electrical Components --------------------- ### Connectors | 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](https://www.mouser.com/ProductDetail/Molex/50-57-9404?qs=%2fha2pyFaduiPWr18IEorNgJfVdsQX51aByN%2f%252bI50Maw%3d)
[Digikey: WM2902-ND](https://www.digikey.com/products/en?keywords=50-57-9404)
[TME: MX-70066-0178](https://www.tme.eu/en/details/mx-70066-0178/raster-signal-connectors-254mm/molex/050579404-50-57-9404-70066-0178/) | | 3-pin connector (body) | Keyed, 3-pin connector used on Einsy for connection to fan. | Molex: 50-57-9403 | [Mouser: 538-50-57-9403](https://www.mouser.com/ProductDetail/Molex/50-57-9403?qs=%2fha2pyFaduiPWr18IEorNqpPP4cjWNMViqfOMj10Fc4%3d)
[Digikey: WM2901-ND](https://www.digikey.com/products/en?keywords=50-57-9403)
[TME: MX-70066-0177](https://www.tme.eu/en/details/mx-70066-0177/raster-signal-connectors-254mm/molex/050579403-50-57-9403-70066-0177/) | | 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](https://nl.mouser.com/ProductDetail/Molex/50-57-9402?qs=%2fha2pyFaduiPWr18IEorNpBHxdeTKRCsjuzRjqU7ETU%3d)
[DigiKey: WM2900-ND](https://www.digikey.com/products/en?keywords=50-57-9402)
[TME: MX-70066-0176](https://www.tme.eu/en/details/mx-70066-0176/raster-signal-connectors-254mm/molex/050579402-50-57-9402-70066-0176/) | | 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](https://www.mouser.com/ProductDetail/Molex/16-02-0097?qs=sGAEpiMZZMtVoztFdqDXO%252bpSlI4T0Hse)
[DigiKey: WM2513-ND](https://www.digikey.com/products/en?keywords=16-02-0097)
[TME: MX-16-02-0097](https://www.tme.eu/en/details/mx-16-02-0097/raster-signal-connectors-254mm/molex/016020097-70058-0206/) | ### Motors | 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](https://github.com/PrusaOwners/prusa_docs/blob/master/mk3_parts/LDO-42STH38-1004A100CM-RevA-for-3D.pdf)
- [LDO XYE motor specs](https://github.com/PrusaOwners/prusa_docs/blob/master/mk3_parts/LDO_XYE_complete_datasheet.ods) | LDO-42STH38-1004A100CM-RevA-for-3D | | Z stepper motor | Z axis | - [LDO Z motor drawing](https://github.com/PrusaOwners/prusa_docs/blob/master/mk3_parts/LDO-42STH34-1004L321E100CM-RevA-for-3D.pdf)
- [LDO Z motor specs](https://github.com/PrusaOwners/prusa_docs/blob/master/mk3_parts/LDO_Z_complete_datasheet.ods) | LDO-42STH34-1004L321E100CM-RevA-for-3D | ### Fans and Blowers | 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](https://noctua.at/en/products/fan/nf-a4x10-flx) | | 5015 Blower fan | Nozzle fan | - 5V
- 0.30A
- 4500 RPM
- Size: 50x50x15 mm
- Mounting hole spacing: 38x43 mm
- Airflow: 3.8 CFM | ? | ? | ### Heated Bed | 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 | ? | ? | ### Cable Management | 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](https://www.conrad.com/ce/en/product/541298/HellermannTyton-170-01000-Twist-In-05-Helagaine-Meshwork-Hose-Black)
[AliExpress: Clone](https://www.aliexpress.com/item/Black-Wrap-Braided-Cable-Sleeve-5mm-3m-General-Wire-Pipe-Hose-Indoor-Wiring-Protection-Flexible-Nylon/32839976444.html?spm=a2g0s.9042311.0.0.67ec4c4dzqdKOg) | | Wrap Braided Cable Sleeve | Hotend assembly cable bundle | - Material: Polyester
- Diameter: 13mm
- Length: ? | HellernammTyton: 170-01002 | [Conrad: 540704](https://www.conrad.com/ce/en/product/540704/HellermannTyton-170-01002-Twist-In-13-Helagaine-Meshwork-Hose-Black) | | 3mm nylon cable | Support for extruder cables | - Material: Nylon
- Diameter: 3mm (not 2.85mm like nylon filament!)
- Length: ? | ? | ? | ### Power Supply | 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](http://www.deltapsu.com/products/panel-mount-power-supply/PMF-24V320WCGB) | | Mean Well PSU 24V 320W | Compatible PSU for MK3| 24V 320W | Mean Well SP-320-24 | [Mean Well website](https://www.meanwell.com/webapp/product/search.aspx?prod=SP-320) | ### Power Cables and Connectors 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](https://www.digikey.com/products/en/connectors-interconnects/terminals-quick-connects-quick-disconnect-connectors/392?k=&pkeyword=&pv1048=20&sf=0&FV=fff40016%2Cfff8041a%2C740002%2C1380087%2C13800b1%2C1380004%2C1380236%2C170000c%2C1700004%2C1700007%2C1f140000%2Cffe00188%2Cfffc0115&quantity=&ColumnSort=0&page=1&pageSize=25) | | 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](https://www.digikey.com/products/en/connectors-interconnects/terminals-spade-connectors/391?k=&pkeyword=&pv78=191&sf=0&FV=fff40016%2Cfff80419%2C1700004%2C4a800ff%2C4ac003b%2Cf88001e%2Cf880024%2Cf88017b%2Cf880185%2Cf880186%2C1f140000%2Cffe00187%2C1380086%2C13800bf&quantity=&ColumnSort=0&page=1&pageSize=25) | | 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](https://www.digikey.com/products/en/connectors-interconnects/terminals-spade-connectors/391?k=&pkeyword=&pv994=30&pv994=36&pv994=389&pv994=379&pv994=390&sf=0&FV=fff40016%2Cfff80419%2C1380086%2C13800be%2C1380239%2C1700004%2C4a800ff%2C4ac003b%2C1f140000%2Cffe00187&quantity=&ColumnSort=0&page=1&pageSize=25) | | Terminal Ring Connector | Heated bed | - 14 AWG
- M3 Stud/Tab size
- Insulated
- Spade width: 6.35 to 8mm | | [Digikey](https://www.digikey.com/products/en/connectors-interconnects/terminals-ring-connectors/394?k=&pkeyword=&pv299=178&sf=0&FV=fff40016%2Cfff8041c%2C1380086%2C13800be%2C1380003%2C1380211%2Cffe0018a%2C1700004%2C1f140000&quantity=&ColumnSort=0&page=1&pageSize=25) |