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Introduction The Importance of Passives Passive components are critical to the operation of electronic devices. Magnetic Components convert and manage power and signal, resistive components manage and sense current, Circuit protection components protect sensitive electronics from overcurrent, overvoltage and overtemperature events. These components are used in many applications, from simple electronic devices such as radios to complex devices such as smart phones, computers, electric vehicles (EVs), green energy storage, 5G mobile networks, autonomous vehicles, and next generation power supplies. Passive components play an essential role in signal processing, power conversion, power management, and electromagnetic interference suppression in electronic circuits. The development of passive components faces several challenges related to their size, capability, and reliability. Shrinking their size while improving their capability is extremely challenging because of the physical limitations of materials, especially magnetics, which require bulky materials to operate. Resistors also face challenges in their development because of material density and the need for heat dissipation. Shrinking the size of resistors reduces their power rating as materials have a finite power dissipation per unit volume. To improve heat dissipation, different techniques need to be deployed such as using heatsinks or advanced materials with higher thermal conductivity. Beyond size and capability, reliability is a critical factor. Environmental factors such as temperature, humidity, and vibration can affect the performance of passive components, as can aging. These factors are especially important in high-reliability applications that expect to see years of extended use (such as automotive, industrial, and military applications). Mighty Guides make you stronger. Credible advice from top experts helps you make strong decisions. Strong decisions make you mighty. Reading a Mighty Guide is kind of like having your own team of experts. These authoritative and diverse guides provide a full view of a topic. They help you explore, compare, and contrast a variety of viewpoints so that you can determine what will work best for you. 4 Passives and Their Emerging Applications