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Electronic components

Circuit protection and sensors fundamentals

Circuit protection and sensors are critical building block of safe, reliable, and compliant electronic designs. This training focuses on what are they, why protection is needed, what problems they prevent, and their functions in real‑world applications.

101.1 What is a fuse?

Fuses are essential safety devices in electronic circuits. They protect against excessive current by breaking the circuit when faults like short circuits or overloads occur. Different types of fuses were described, along with their widespread use in consumer electronics, vehicles, industrial equipment, renewables, and medical devices.
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101.2 What is a PPTC fuse?

PPTC resettable fuses, also known as Polymer Positive Temperature Coefficient devices, automatically reset after an overload.

This video explains how they work and highlights key benefits such as reusability and compact size, making them suitable for USB ports, LED lighting, motors, routers, and automotive electronics.

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101.3 What is a TVS diode?

A TVS diode (Transient Voltage Suppressors Diode) is designed to respond instantly to voltage transients and protect sensitive components from damage.

In this video, you'll learn how TVS diodes protect electronics from voltage spikes by clamping excess energy. It also covers the types, advantages and applications. 

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101.4 What is an ESD suppressor?

ESD is a sudden flow of electricity between two charged objects. It might seem harmless, but in electronics, it can destroy circuits, or even disable entire systems. 

In this video, we will walk you through what is an ESD, explains the risks and ESD suppressors working principles, introducdes the main types and highlights their applications.

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101.5 What is a current sense resistor?

Current sense resistor plays a critical role in precision current measurement, system control, and protection. The video explains why current sensing matters, how current sense resistors work, different types and their place in a circuit for effective measurement. 
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