Miniature Cartridge Heater

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

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

For the complete range of cartridge heaters, see our
Cartridge Heater
products.

Miniature cartridge heater for precision heating

Miniature Cartridge Heater Specifications

Miniature cartridge heaters can be configured to match the available installation space, electrical requirements, and heating performance of your equipment.

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%
Minimum Non-heating Section	25mm

Stock & Custom Miniature Cartridge Heaters

Common miniature cartridge heater sizes are available for standard applications. Diameter, heated length, voltage, power, and lead-wire specifications can also be customized for OEM requirements.

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

Why Choose a Miniature Cartridge Heater?

Miniature cartridge heaters are designed for precision heating applications where standard cartridge heaters are too large or difficult to install. Their small diameter allows heating to be integrated into compact components while providing fast, localized heat transfer.

Compact diameter for limited installation space
Fast and localized heating
Suitable for low-voltage and compact heating systems
Custom voltage, power, and heated length
High-purity MgO insulation
Flexible lead configurations
Suitable for OEM and replacement applications

Miniature Cartridge Heater Applications

Miniature cartridge heaters are commonly used in compact equipment and precision heating systems where installation space is limited.

3D printer hot-end heating
Small precision mold 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

For a broader overview of cartridge heater applications, see our
Cartridge Heater Applications
page.

How to Select a Miniature Cartridge Heater

Select the heater according to the available installation space, required heat output, and operating conditions of the equipment.

Diameter: Match the heater diameter to the available bore or installation hole.
Heated length: Select a heated length that matches the area requiring heat.
Voltage and power: Match the heater to the available electrical supply and required heat output.
Watt density: Consider the material being heated and the required heating speed.
Lead configuration: Select the lead length and direction according to the equipment layout.
Sheath material: Choose the appropriate material according to temperature and operating conditions.

If you are experiencing slow heating, temperature fluctuation, frequent burnout, or other cartridge heater problems, see our
Cartridge Heater Troubleshooting Guide
for common causes and practical solutions.

Custom Miniature Cartridge Heaters

We support OEM and custom production of miniature cartridge heaters for special equipment and precision heating applications. Custom specifications are available for diameter, heated length, voltage, power, watt density, lead configuration, and sheath material.

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

For OEM requirements beyond standard configurations, see our
Custom Cartridge Heater
solutions.

Request a Miniature Cartridge Heater Quote

Need a Miniature Cartridge Heater for your equipment? Send us your required diameter, heated length, voltage, power, lead configuration, and quantity. Our team can recommend a suitable stock or custom heating solution.