NTC 3950 100K Thermistor for 3D Printer Hotend – V6 Compatible

Mellow NTC 3950 100K Thermistor – Precision Temperature Sensor for 3D Printers

Upgrade your 3D printer's temperature sensing with the Mellow HT-NTC 100K Thermistor (B3950). Engineered for high-temperature FDM printing, this Negative Temperature Coefficient (NTC) thermistor delivers stable, accurate readings across a wide operating range — making it an excellent drop-in upgrade or replacement for your hotend heat block.

Why Upgrade to the HT-NTC 100K?

Traditional K-type thermocouples can be sensitive to wiring interference and temperature fluctuation. This upgraded NTC thermistor eliminates those headaches with a fully enclosed, packaged sensor head — reducing external signal noise and delivering consistent, drift-free temperature data for better print quality.

Key Features

• High Accuracy: 1% resistance tolerance; 100KΩ at 25°C (B value: 3950)
• Extended Temperature Range: -50°C to +320°C — ideal for printing high-temperature filaments such as ABS, ASA, Nylon, and PC
• Enclosed Stainless Steel Probe: 304 stainless steel cylinder (3mm diameter × 15mm length) for maximum durability and precise internal temperature measurement
• High-Temperature PTFE / Teflon Wiring: Insulated wiring handles extreme hotend temperatures without degradation
• Wide Compatibility: Works with V6, Cyclops, Chimera heat blocks and PT100-style housings
• Available in 1M and 2M Cable Lengths: Choose the right reach for your printer's wiring harness
• No Assembly Required: Ready to install straight out of the package

Technical Specifications

Package Contents

1M Option:

• 1 pc / 3 pcs — A-end line length: 15cm
• 1 pc / 3 pcs — B-end line length: 85cm

2M Option:

• 1 pc / 2 pcs — A-end line length: 15cm
• 1 pc / 2 pcs — B-end line length: 185cm

Combo Option: 1 pc 1M or 2M HT-NTC + 1 pc PT100 V6 Block

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Frequently Asked Questions

Q: Is this NTC 100K thermistor compatible with Marlin firmware and common 3D printer boards?

A: Yes. The HT-NTC 3950 100K thermistor uses the widely supported B3950 coefficient, which is directly selectable in Marlin, Klipper, and RepRapFirmware. Simply set your thermistor type to the corresponding NTC 100K 3950 option in your firmware configuration.

Q: Can this thermistor replace a K-type thermocouple on my 3D printer hotend?

A: Absolutely. The HT-NTC 100K is specifically designed as an upgrade over K-type thermocouples. With a 320°C maximum operating temperature and a fully enclosed stainless steel probe, it handles the same high-temperature printing tasks with greater stability and less susceptibility to electrical interference.

Q: What is the difference between the 1-meter and 2-meter cable options?

A: The 1-meter version features an 85cm B-end cable, suitable for most desktop 3D printers with standard wiring runs. The 2-meter version provides a 185cm B-end cable, ideal for larger-format printers or builds with extended cable management requirements. Both versions use the same high-temperature PTFE-insulated wire and identical sensor heads.

Q: Does this thermistor work with V6, Cyclops, and Chimera heat blocks?

A: Yes. The 3mm × 15mm cylindrical probe is sized to fit standard thermocouple-compatible ports on V6, Cyclops, and Chimera heat blocks, as well as PT100-style housings. No modification is needed for most common hotend assemblies.

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.