12V 40W Ceramic Cartridge Heater 6x20 mm, 1 m for 3D Printer
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Prices updated: 14 Oct 2026
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About this product
A 12 V, 40 W ceramic cartridge heater with a 6 mm diameter and 20 mm length, used to heat the hotend block of a 3D printer. It is a common replacement part for RepRap and Prusa-style printers that use cartridge heaters. Pair it with a temperature sensor and a heater driver in the printer's control board.
Specifications
- Voltage
- 12 V
- Power
- 40 W
- Diameter
- 6 mm
- Length
- 20 mm
- Listed length
- 1 m
- Type
- Ceramic cartridge heater
Frequently asked questions
Will this heater fit my 3D printer hotend?
It is sized for hotends with a 6 mm bore and a 20 mm heating length. Measure the bore of your hotend block before ordering a replacement and confirm the voltage matches your printer's heater circuit.
How is the heater wired?
A cartridge heater has two wires and no polarity, so either wire can go to either terminal. Connect it to the heater output of the printer board, and keep the heater wires separate from the thermistor wires.
