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Thermistors and varistors are both semiconductor components, but they serve different purposes in electronic circuits. Understanding their differences is crucial for selecting the right component for your application.  

What is a Thermistor?  

Thermistors are temperature-sensitive resistors that change their resistance based on temperature. They are divided into two main types:  

1. Positive Temperature Coefficient (PTC) Thermistors: Resistance increases as temperature rises.  

2. Negative Temperature Coefficient (NTC) Thermistors: Resistance decreases as temperature rises.  

Thermistors are widely used for temperature sensing, control, and compensation in various applications, such as automotive, medical devices, and consumer electronics.  

What is a Varistor?  

A varistor, also known as a Voltage Dependent Resistor (VDR), is a nonlinear resistor whose resistance changes with voltage. It is primarily used to protect circuits from overvoltage conditions by clamping voltage spikes and absorbing excess current.  

The most common type is the Zinc Oxide (ZnO) Varistor, which is a II-VI oxide semiconductor. Varistors are often referred to as "surge absorbers" or "electrical shock suppressors" and are essential for protecting sensitive electronic components from voltage surges.  

Key Differences Between Thermistors and Varistors  

Applications of Thermistors and Varistors  

- Thermistors:  

  - Temperature sensing in HVAC systems.  

  - Overcurrent protection in power supplies.  

  - Temperature compensation in automotive and medical devices.  

- Varistors:  

  - Surge protection in power lines and electronic devices.  

  - Voltage stabilization in consumer electronics.  

  - Protection against lightning strikes and electrical surges.  

Why Choose Nanjing Shiheng Electronic Technology Co., Ltd.?  

As a leading manufacturer of NTC thermistors, PTC thermistors, and zinc oxide varistors, we offer high-quality components with the following advantages:  

- High Precision: Our thermistors provide accurate temperature sensing and control.  

- High Reliability: Varistors with excellent surge absorption capabilities.  

- Certifications: Products comply with UL, TUV, and CQC safety standards.  

- Custom Solutions: Tailored designs to meet specific application requirements.  

Our product range includes:  

- NTC Thermistors: MF51, MF52, MF58 series (AEC-Q200 certified).  

- Varistors: GNR, VDR, and MYG types for surge protection.  

Both thermistors and varistors play critical roles in modern electronics, but they serve different purposes. Thermistors are ideal for temperature sensing and control, while varistors are essential for overvoltage protection.  

At Nanjing Shiheng Electronic Technology Co., Ltd., we specialize in providing high-performance NTC thermistors, PTC thermistors, and zinc oxide varistors to meet your needs. Contact us today to learn more about our products and how we can help you achieve reliable and efficient electronic designs!  

Looking for High-Quality Thermistors or Varistors?  

Contact Nanjing Shiheng Electronic Technology Co., Ltd. today to explore our range of NTC thermistors, PTC thermistors, and zinc oxide varistors. Let us help you find the perfect solution for your application!