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E3D Thermistor Cartridge


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Current Stock: 78

Free shipping in Canada for orders over $140 before tax. (via Canada Post)

A replacement E3D cartridge type Semitec 104Gt thermistor suitable for all E3D HotEnds using a cartridge type Heater block.

Thermistor cartridge 

Cartridge type thermistors use a Semitec 104NT thermistor, potted in a cylindrical stainless steel cartridge with a high conductivity ceramic based adhesive.

The legs are insulated with fibreglass sleeving and terminated with a Molex Microfit 3.0 connector.

This makes it easy to disconnect your entire HotEnd without the need for rewiring, especially when paired with our high precision heater cartridges.

Key features: 

  • Max temperature rating: 285°C
  • Cartridge diameter: 3mm 
  • Cartridge length: 15mm 
  • Cable Length: 50mm
  • Cable Colour: Blue
  • Connector type: Molex Microfit 3.0

Kit includes: 

  • 1 x Thermistor cartridge 
  • 1 x Thermistor extension cable 


  • Type 5 thermistor in Marlin Firmware

Buy an E3D thermistor cartridge from Spool3D for your 3D printer in Canada without the surprise cost of the exchange rate!



4 out of 5 (based on 16 ratings)
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Reliable temperature readings, but the wires not so much...

I'm still going 4 stars because it is a very reliable thermistor from a sensor perspective and the quick-connect is much easier than running a full metre of wire every time you need to replace them. Just annoyed that I've had 2 fail in the last 6 months due to the very low gauge wiring. Adding additional stress relief has helped, but I may go as far as reinforcing the wiring itself somehow. Something to keep in mind if ordering.
Posted by Braden, May 26, 2020

Excellent thermal sensor

Bought a couple of these to upgrade an older Lite6, they're a plug and play replacement for the older versions.
Posted by Edward Simpson, January 01, 2020

MKS Gen-L v1.0

The wire broke off the Cartridge only after one small print.
Posted by Bruce Nally, September 25, 2019

e3d heater cartridge

This unit is also a flawless performer and works just fine as long as the user keeps tools away from it. 100 % user at fault to need a replacement at least in my case.
Posted by ToolBuilder, August 26, 2019

E3D Thermistor Cartridge

Always great quality products from E3D. Rather than switch nozzles I'm assembling complete hot ends with different size nozzles and quick disconnects. I've found that switching just the nozzle was damaging my heater block.
Posted by Doug B, June 07, 2019


Bought it here so i would not have to deal with usual Prusa backorders and customs fees. Great thermistor replacement for original Prusa MK3!
Posted by Matthew, March 21, 2019

It's a Thermistor all right

Worked as expected, it's nice to have the plug so the next time I mess up a print so badly it rips off the thermistor AGAIN, I can replace it without disassembling my printer.
Posted by Donovan, December 20, 2018

right product for my problem

My thermistor failed on my prusa. Ordered this unit as a replacement. Arrived quicker than expected and got me back to printing right quick. Thanks.
Posted by undefined, September 13, 2018

E3D OEM part

bought to replace original on E3D titan V6 turns out the faulty signal was from the wiring connecting the thermistor back to the control board... so now I have a spare
Posted by SM, August 13, 2018