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Ten small glass-bead thermistors with two bare wire leads each

Unique-Bargains

Unique-Bargains 3950 100K Ohm Thermistor 10pcs

SKU CH-S4F4-3QBPA MPN 3950

Pack of 10 NTC 3950 100K Ohm thermistors accurate to ±1% from -40 °C to 250 °C for 3D printer hot ends and heated beds

  • Accurate temperature sensing with ± 1 % precision
  • Measures from -40 °C up to 250 °C for high-temperature filaments
  • 100K Ohm 3950 model fits common heating blocks
  • Pack of 10 thermistors covers multiple printer builds
  • Compatible with popular RepRap and Creality machines

100K Ohm NTC Thermistor Pack

This pack contains ten NTC 3950 thermistors rated at 100K Ohm with ±1% accuracy. They operate across a -40 °C to +250 °C range for precise temperature monitoring. Each sensor fits heating blocks designed for thermocouple-style probes. The components are new and ready for installation.

Compatible 3D Printers and Exclusions

These thermistors suit owners of RepRap, Ender 3, Ender 3 Pro, Ender 5, CR-10 or CR-10S machines needing replacement or spare hot-end and heated-bed sensors. Builders using printers that require a different resistance value, connector type or probe geometry should look at other parts. The ten-piece quantity also exceeds the needs of a single repair.

100K Ohm Resistance Value

The 100K Ohm nominal resistance at 25 °C is the critical parameter that must match the printer firmware configuration. If the control board expects a different resistance curve the temperature readings will be incorrect and prints will fail. Verify this value against your firmware settings before purchase.

Highlights

  • Accurate temperature sensing with ± 1 % precision
  • Measures from -40 °C up to 250 °C for high-temperature filaments
  • 100K Ohm 3950 model fits common heating blocks
  • Pack of 10 thermistors covers multiple printer builds
  • Compatible with popular RepRap and Creality machines

Specifications

BrandUnique Bargains

Questions about this item

How does the 100K Ohm resistance behave when the hot-end reaches 250 °C?

At 250 °C the resistance drops far below 100K Ohm, letting the printer firmware calculate the exact temperature from the 3950 Beta curve.

What connector standard does the thermistor use to plug into the control board?

The leads are bare wires; they are inserted directly into the two-pin thermistor header on boards used by Ender 3, Ender 5, CR-10 and similar printers.

What size heating-block hole do these sensors fit?

The glass bead is a standard 3 mm cartridge that slides into the 3 mm thermistor bore found on most RepRap-style heater blocks.

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