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NTC Thermistors
NTC Thermistors: Precise Temperature Sensing with alfatec
As an engineer, technician, or purchaser, you know that accurate temperature measurement and monitoring are critical in countless applications.
NTC thermistors (Negative Temperature Coefficient) are often the first choice.
alfatec GmbH & Co. KG offers high-quality NTC temperature sensors - especially from our partner Sunlord—that stand out for their precision, reliability, and excellent price-performance ratio.
What Is an NTC Thermistor?
An NTC thermistor, also known as a negative temperature coefficient resistor, is a temperature-dependent resistor.
Its defining characteristic is that its electrical resistance decreases as temperature increases. Conversely, resistance increases as temperature decreases. This behavior is typically nonlinear and follows a specific NTC curve.
This property makes NTCs ideal for applications requiring precise temperature detection or temperature compensation in circuits. They are typically made from sintered metal oxides (ceramic materials), with the composition determining their specific resistance and temperature characteristics.
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Technical Parameters: NTC Curve and Key Values
To select the right NTC for your application, the following parameters are essential:
- Nominal Resistance (R25): Resistance at 25°C. alfatec offers a wide range, e.g., R25 = 4.7 kΩ to 225 kΩ.
- B-Constant (B-Value): Describes the steepness of the NTC curve over a temperature range (e.g., B25/50, B25/85). Higher B-values indicate greater resistance change per °C. Typical values range from 3380 K to 4350 K.
- Tolerance (R25 and B): Indicates allowable deviation (e.g., ±1%, ±3%, ±5%). Tighter tolerances enable more precise measurements.
- Operating Temperature Range: e.g., -40°C to +150°C, depending on the application.
- Power Dissipation: Maximum power the NTC can handle without excessive self-heating.
- Package Sizes: Available from 0402 to 2012 and beyond.
NTC Thermistor Types: Versatility for Every Application
NTC thermistors come in various form factors to meet the needs of different applications:
- SMD NTC Thermistors (Chip Type): Surface-mount components ideal for automated PCB assembly. They are compact and offer fast response times. alfatec primarily offers high-quality multilayer chip types from Sunlord.
- Lead-Type (Radial or Axial): These through-hole components are ideal for applications requiring higher power dissipation or mechanical robustness. Common in power supplies, industrial equipment, and HVAC systems.
- Glass-Encapsulated NTCs: Designed for harsh environments, these thermistors offer excellent moisture resistance and long-term stability. Suitable for automotive, medical, and outdoor applications.
- Epoxy-Coated NTCs: Cost-effective and widely used in consumer electronics and household appliances.
- NTC Probes and Assemblies: Integrated into housings or cables for easy installation in temperature-critical environments such as HVAC ducts, battery packs, or fluid tanks.
If you require specific shapes or leaded variants, alfatec will help you find the right solution.
Our partner for thermistors
Sunlord
Our partner Sunlord has been developing and producing chip-based electronic components such as EMC or RF components, coils, inductors and transformers since 2000. The company also offers development work for customised designs and has already received Tier 1 certifications for this.
Sunlord NTC Thermistors: Advantages with alfatec
As your partner for high-quality electronic components, alfatec relies on strong suppliers. Sunlord is a leading manufacturer of passive SMD components. Their NTC temperature sensors offer:
- High precision & tight tolerances: Ideal for demanding measurement and control tasks.
- Miniaturization: Specialized in compact SMD formats for space-constrained designs.
- Reliability & quality: Manufactured to strict standards, often qualified for automotive use.
- Broad portfolio: Wide selection of resistance and B-values in standard SMD sizes.
- Multilayer technology: Ensures high stability and reliability.
Request your personalized quote now
Choose alfatec as your supplier for NTC thermistors and benefit from:
- Technical expertise: Our team will help you select the optimal NTC for your specific application.
- Quality components: We supply reliable NTC temperature sensors from established manufacturers such as Sunlord.
- Wide range: Access to a variety of resistance and B values as well as designs.
- Fast availability: Efficient logistics for your production requirements.
See the quality and performance of our NTC thermistors for yourself. Request a non-binding quote today or download the data sheets.
alfatec – your partner for high-quality electronic components
As a competent partner for electronic components, alfatec supports you in selecting the right NTC thermistors for your applications. We offer comprehensive advice and are happy to answer any questions you may have about power modules.
Do you have questions about our NTC thermistors or would you like personal advice? Feel free to contact us.