Mellow THC-01 3-in-1 Multi-Color Switching Hotend Bowden Kit

Mellow THC-01 3-in-1 Out Multi-Color Switching Hotend Kit for Reprap i3 & Bowden Extruders

Take your FDM 3D printing to the next level with the Mellow THC-01 Hotend Kit — a precision-engineered 3-in-1-out color-switching hotend designed for Reprap i3 and compatible Bowden extruder setups. Whether you want crisp single-color prints, vivid dual-color models, or full three-color filament-switching output, this kit gives you the flexibility to do it all from a single nozzle.

Please note: This hotend kit supports single-color, dual-color, and three-color filament switching printing. It is not designed for color mixing. Made in Mainland China.

Key Features

• 3-in-1-out design — switch between up to 3 filament colors or materials seamlessly
• 1.75mm filament compatible — works with the most widely available filament diameter
• Wide nozzle range — default 0.4mm nozzle included; compatible with 0.2 / 0.3 / 0.5 / 0.6 / 0.8 / 1.0mm (specify at checkout)
• Bowden feeding system — compatible with Bulldog, Titan, and other Bowden extruders (Bulldog recommended)
• Fast, stable color switching — clean transitions with no significant print quality degradation
• Simple firmware setup — easy to configure for 1, 2, or 3-color printing with minimal changes
• Dual voltage support — works with both 12V and 24V heating setups
• Durable aluminum alloy construction — heat sink block made from aluminum alloy, stainless steel, and brass
• Ready to use — no assembly required; comes pre-assembled with heater and thermistor

Technical Specifications

What's in the Box

• 1× THC-01 Hotend Assembly (with heater and thermistor pre-installed)

Compatible Products You May Also Like

• 5-Pair Nitrile Work Gloves – Anti-Slip Full Finger Safety — ideal for safe handling during installation
• Ball End Hex Screwdriver Bit – Magnetic Reduced Shank Steel — perfect for assembling printer hardware
• T2 Pure Bare Copper Wire 0.1–2mm Round Solid Uncoated 10M — useful for wiring and electrical connections

Learn more: OSHA on personal protective equipment

Frequently Asked Questions

Q: Does the Mellow THC-01 hotend support color mixing or only color switching?

A: The THC-01 hotend kit supports filament color switching only — it can print with 1, 2, or 3 separate colors by switching between filaments. It does not blend or mix colors simultaneously. Each color is fed and retracted independently through the single shared nozzle.

Q: Which extruders are compatible with the THC-01 Bowden hotend?

A: The THC-01 is designed for use with Bowden-style extruders, including the Bulldog (recommended), Titan, and most other standard Bowden extruders. It is suitable for Reprap i3-style 3D printer frames.

Q: Can I get a nozzle size other than 0.4mm with the THC-01 hotend kit?

A: Yes! While the 0.4mm nozzle is shipped as the default, the THC-01 is compatible with nozzle sizes of 0.2, 0.3, 0.5, 0.6, 0.8, and 1.0mm. Simply leave a note specifying your preferred nozzle diameter when placing your order.

Q: Does the THC-01 hotend work with both 12V and 24V printer power supplies?

A: Yes, the Mellow THC-01 hotend supports both 12V and 24V heating configurations, making it compatible with a wide range of FDM 3D printer setups.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.