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Home / Hot End and Nozzle / Hot End Extruder Nozzle, Heater Cartridge, and Thermocouple Kit Compatible with Prusa MK4/XL 3D Printers

Attributes

Brand -
Category 3D Printing Accessories / Hot End and Nozzle
Origin -
Compatible Printer Models Prusa MK4, Prusa XL
Heater Voltage 24V DC
Heater Power 40W
Thermistor Type NTC 100k Ohm
Max Operating Temperature 290°C
Connector Type JST PH 2.0mm 2-Pin
Cable Length 1.5 meters
Material Construction Stainless Steel & Silicone Insulation
Item Weight 25 grams
Package Contents Heater Cartridge, Thermistor, Cable Assembly

5 reviews

A

Anonymous

Apr 08, 2026

Rating: 4/5

Good quality, stiff cable

Works great, temperature readings are accurate. The cable is a bit stiff compared to the original but manageable within the chain.

A

Anonymous

Apr 04, 2026

Rating: 4/5

Solid spare part

No complaints. Fits perfectly into the Nextruder block. Price is reasonable for a backup component.

A

Anonymous

Feb 12, 2026

Rating: 5/5

Fixed my heating error

Had a thermal runaway error. Swapped this in and problem solved. Glad I keep spares on hand for emergencies.

A

Anonymous

Feb 06, 2026

Rating: 5/5

Perfect Replacement

Exactly what I needed for my MK4. Installation was straightforward following the manual. Heating is consistent and temperature readings are accurate.

A

Anonymous

Jan 21, 2026

Rating: 5/5

Genuine Feel

Seems like an official part. My printer is back to printing PLA without issues. Fast shipping too.

5 FAQ

Q: Is installation difficult?

A: It requires basic tools and disassembly of the hotend. Please refer to the official Prusa manual for guidance.

Q: Does this include the brass nozzle tip?

A: No, this kit includes the heater cartridge and thermistor assembly only. The nozzle tip is sold separately.

Q: What is the maximum safe temperature?

A: It is rated up to 290°C, suitable for most common filaments including ABS, PETG, and PLA.

Q: Does it come with thermal paste?

A: No, we recommend applying fresh thermal paste during installation for best heat transfer results.

Q: Is this compatible with Prusa MK3S+?

A: No, this is designed specifically for the MK4 and XL Nextruder system. The MK3S+ uses a different hotend assembly.

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