NTC 100K
100K Thermistor NTC 3950 — Zentriad SKU 872105

SKU: 872105

🔥 3D Printer Sensor

100K Thermistor

★★★★★ (24 Reviews)
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High-precision 100k ohm NTC thermistor with a 3950 B-value. Specifically designed for 3D printer hotends and heatbeds, providing accurate temperature readings up to 250°C.

🛒 Buy 100K Thermistor Now
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📦 Bulk Pricing Available

The 100K Thermistor is the industry standard for 3D printing and high-temperature IoT projects. Featuring a glass-encapsulated NTC bead, this sensor offers a balance of durability and rapid thermal response. Whether you are replacing an Ender 3 hotend sensor or building a custom heat controller, the 100K NTC 3950 provides reliable performance.

Main Features

● 100kΩ Resistance at 25°C
● Stable 3950K B-Value constant
● Glass Bead for high-temp stability
● Compact 1.25mm head size
● Compatible with Marlin & RepRap
● Wide range: -50°C to +250°C
Nominal Resistance100kΩ at 25°C
B-Value (B25/50)3950K ± 1%
Resistance Tolerance± 1%
Operating Temp Range-50°C to +250°C
Dissipation Factor≥ 2.0mW/°C
Thermal Time Constant≤ 10 seconds (in air)
Lead WireTin-plated copper / High-temp insulation
Head ConstructionGlass Encapsulated Bead
The difference is their resistance at 25°C:
  • 10k thermistor → 10,000 ohms at 25°C
  • 100k thermistor → 100,000 ohms at 25°C
Practical impact:
  • 100k → more sensitive at lower temps, lower current draw
  • 10k → more common, better noise immunity, easier interfacing
A 10k thermistor is a temperature-sensitive resistor with 10kΩ resistance at 25°C. Most are NTC (Negative Temperature Coefficient) — resistance decreases as temperature rises.
  • NTC 10k thermistor: Nonlinear, very sensitive, cheaper
  • PT100 (RTD): Linear, highly accurate, more stable over time, 100Ω at 0°C
👉 NTC = fast & cheap   👉 PT100 = precise & industrial-grade
  • NTC (Negative Temperature Coefficient) → resistance ↓ when temp ↑
  • PTC (Positive Temperature Coefficient) → resistance ↑ when temp ↑
Not directly. A potentiometer is adjustable, while a thermistor changes with temperature. You can use it for testing or simulation, but:
  • Circuit response will differ
  • Voltage divider scaling changes
A thermistor with 100kΩ resistance at 25°C, typically NTC. Used where higher sensitivity and lower current are needed — common in 3D printers, HVAC systems, and battery management.
Typically:
  • -40°C to 125°C (standard)
  • Some models go up to 150°C or higher depending on design and encapsulation
  • Temperature sensing (HVAC, appliances)
  • Battery management systems
  • 3D printers (very common for hotend & heatbed)
  • Inrush current limiting (in power supplies)
No. PT1000 is an RTD (Resistance Temperature Detector), not a thermistor. It has a positive temperature coefficient and is very linear in its response.
No. It belongs to the RTD (Resistance Temperature Detector) family, not thermistors. RTDs use pure metals (like platinum), while thermistors use semiconductor materials.
Yes, in behavior (resistance increases with temperature), but technically it is classified as an RTD, not a PTC thermistor. The distinction matters in circuit design and calibration.
A platinum RTD (Resistance Temperature Detector) temperature sensor with 1000Ω at 0°C.
A platinum RTD with 1000Ω resistance at 0°C. The "PT" stands for platinum, and "1000" indicates the resistance value in ohms at 0°C.
  • Higher sensitivity for precise temperature measurement
  • Better suited for accurate sensing applications
  • Cheaper and more widely available
PTCs are more often used for protection purposes (overcurrent, self-regulating heating) rather than precision measurement.
Typically -40°C to 125°C for standard models. The range can vary by manufacturer — some versions support up to 150°C depending on build and encapsulation quality.
The key differences are resistance level, sensitivity curve, and power consumption:
  • 100k: More sensitive at low temps, lower current draw
  • 10k: More common in consumer electronics, better noise performance at higher temps
They are not interchangeable without adjusting the pull-up resistor and firmware settings.
Typically:
  • 125°C continuous operation
  • Up to ~150°C peak (depends on build quality and encapsulation)
For higher sustained temperatures, consider a glass-bead version with high-temp wire insulation.
  1. Set your multimeter to ohms (Ω) mode
  2. Measure resistance at room temperature (~25°C) — it should read close to 100kΩ
  3. Warm the thermistor with your hand or a heat gun
  4. Resistance should drop — this confirms correct NTC behaviour
If resistance stays the same or rises, the thermistor may be faulty.

For bulk orders or technical support on the 100K Thermistor, contact our regional offices:


Zentriad India: +91 80868 61017 | info@zentriad.com

Location: Thrissur, Kerala & Gandhinagar, Gujarat.

Why the 100K Thermistor is Essential for 3D Printing

When it comes to 3D printing, temperature precision is the difference between a successful print and a nozzle clog. The 100K thermistor is the most common sensor used in FDM printers because of its ability to handle high temperatures up to 250°C.

The NTC 100K 3950 model is specifically calibrated to work with 3D printer controller boards like SKR, RAMPS, and Creality original boards. Because it is an NTC (Negative Temperature Coefficient) sensor, its resistance drops as the hotend heats up, allowing your printer to maintain a steady melting point for PLA, ABS, and PETG filaments.

Where to buy 100K Thermistor online in India?

Zentriad is a leading supplier of 100k ohm thermistors in India. We offer high-quality glass-encapsulated sensors that are tested for accuracy. Whether you are a hobbyist in Kerala or an industrial manufacturer in Gujarat, we provide fast shipping and bulk discounts on all our temperature sensors.

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