Miniature Cartridge Heater | 3-6mm Micro Heating Element

Miniature / Micro Cartridge Heater

Miniature / Micro Cartridge Heater is a compact single-end heating element designed for precision heating where installation space is limited. With small diameters from 3mm to 6mm, it provides fast and localized heating for 3D printers, laboratory instruments, small molds and precision automation equipment.

Stock sizes are available, while custom voltage, power, heated length, diameter and lead configurations can be manufactured for OEM applications.

For general-purpose industrial heating applications, see our
Standard Cartridge Heater.
For applications requiring higher power density and faster localized heating, see our
High-Density Cartridge Heater.

Product Specifications

Item	Specification
Product Type	Miniature / Micro Cartridge Heater
Diameter	3mm – 6mm
Heated Length	20mm and above, custom-made
Voltage	24V / 110V / 220V standard options; custom voltage available
Power	Custom-made according to diameter and heated length
Watt Density	8 – 15 W/cm²
Sheath Material	SUS321; SUS316L / Inconel 600 for custom orders
Insulation Filler	High-purity compacted Magnesium Oxide (MgO)
Standard Lead-out	Straight lead, high-temperature fiberglass wire, default lead length 300mm
Power Tolerance	-10% ~ +5%
Diameter Tolerance	-0.02 ~ -0.06mm
Minimum Non-heating Section	25mm

Stock & Custom Miniature Cartridge Heaters

Common miniature cartridge heater sizes are available for standard applications. Models marked as Custom are manufactured according to customer requirements. Diameter, heated length, voltage, power and lead-wire specifications can be customized.

Diameter (mm)	Heated Length (mm)	Voltage	Power (W)	Watt Density (W/cm²)	Stock Status
Φ3	20	24V / 110V / 220V	30	12.7	Custom
Φ3	30	24V / 110V / 220V	45	12.7	Custom
Φ3	40	24V / 110V / 220V	60	12.7	Custom
Φ4	25	24V / 110V / 220V	40	12.7	Custom
Φ4	40	24V / 110V / 220V	65	12.9	Custom
Φ4	50	24V / 110V / 220V	80	12.7	Custom
Φ5	30	220V	60	12.7	Stock
Φ5	40	220V	80	12.7	Stock
Φ5	50	220V	100	12.7	Stock
Φ5	60	220V	120	12.7	Stock
Φ6	30	220V	70	12.4	Stock
Φ6	40	220V	90	12.0	Stock
Φ6	50	220V	110	11.7	Stock
Φ6	60	220V	130	11.5	Stock

Custom Miniature Cartridge Heater

We support OEM and custom production for Miniature Cartridge Heater applications. Custom specifications are available for special equipment and precision heating applications.

Custom diameter from 3mm and above
Custom heated length and overall length
Custom voltage and power
Custom watt density
Custom lead-wire length
Straight or special lead configurations
SUS321 / SUS316L / Inconel 600 sheath options

Applications

3D-printer hot-end heating
Small precision mould inserts
Laboratory miniature heating blocks and test equipment
Medical analytical instruments
Small heat-cutting and heat-sealing components
Automation miniature heating modules
Semiconductor small-size heating assemblies

FAQ

Q: What is the smallest diameter available?

A: Our miniature cartridge heaters are available from approximately 3mm diameter. Smaller or special dimensions can be evaluated for custom applications.

Q: Do you have miniature cartridge heaters in stock?

A: Yes. Selected Φ5mm and Φ6mm models in 220V specifications are available as stock sizes. Φ3mm and Φ4mm models listed above are custom-made.

Q: Can the voltage and power be customized?

A: Yes. Voltage, power, heated length, diameter and lead-wire specifications can be customized according to your equipment requirements.

Q: Are these heaters suitable for 3D printers?

A: Yes. Miniature cartridge heaters are suitable for compact heating assemblies such as 3D-printer hot ends and other small precision heating systems.

Related Cartridge Heater Products

Different applications require different cartridge heater designs. Explore our related cartridge heater products:

Standard Cartridge Heater

– A general-purpose cartridge heater for molds, heating blocks, packaging machinery and industrial heating equipment.
High-Density Cartridge Heater

– Designed for applications requiring higher watt density, faster heat-up and concentrated heating output.