Varistors – Protecting Circuits from Voltage Surges

Introduction

Varistors, also known as voltage-dependent resistors, protect electronic circuits from transient voltage spikes. They are essential for maintaining the longevity and safety of sensitive electronic devices.

Features

• Voltage-sensitive: Resistance changes according to the applied voltage

• Fast response time to sudden voltage fluctuations

• Bidirectional protection for both positive and negative voltage spikes

Applications

• Surge protection for home appliances and industrial equipment

• Power strips and protective devices

• Telecommunication systems exposed to lightning or electrical disturbances

Advantages

• Enhances safety by preventing damage to circuits

• Cost-effective solution for voltage protection

• Compact and easy to integrate into existing electronic designs

Conclusion

Varistors are a simple yet critical component for protecting circuits from unexpected voltage surges, ensuring device reliability and operational safety.

Blog 3: Thermistors – Precision Temperature Sensing and Protection

Introduction

Thermistors are temperature-sensitive resistors widely used for temperature measurement and circuit protection. Their resistance varies significantly with temperature, allowing precise monitoring and control in electronic systems.

Types

• NTC (Negative Temperature Coefficient): Resistance decreases as temperature rises

• PTC (Positive Temperature Coefficient): Resistance increases as temperature rises

Applications

• Overcurrent and overtemperature protection

• Temperature sensing in electronic circuits

• Inrush current limiting during power-up

Advantages

• Accurate temperature measurement

• Protects circuits from thermal damage

• Suitable for a wide variety of industrial and consumer applications

Conclusion

Thermistors are essential for monitoring and controlling temperature, ensuring the safe and reliable operation of electronic devices.