{"id":173,"date":"2026-08-05T18:54:50","date_gmt":"2026-08-05T10:54:50","guid":{"rendered":"http:\/\/www.beritakeren.com\/blog\/?p=173"},"modified":"2026-08-05T18:54:50","modified_gmt":"2026-08-05T10:54:50","slug":"what-are-the-inductance-effects-on-automotive-grade-mosfets-4a18-ab114f","status":"publish","type":"post","link":"http:\/\/www.beritakeren.com\/blog\/2026\/08\/05\/what-are-the-inductance-effects-on-automotive-grade-mosfets-4a18-ab114f\/","title":{"rendered":"What are the inductance effects on automotive grade MOSFETs?"},"content":{"rendered":"

As a seasoned supplier of automotive grade MOSFETs, I’ve spent years delving into the intricate world of semiconductor technology, particularly focusing on the impact of inductance on these critical components. This blog aims to shed light on how inductance affects automotive grade MOSFETs, offering insights that can help automotive engineers and procurement managers make informed decisions. Automotive Grade MOSFETs<\/a><\/p>\n

<\/p>\n

Understanding Inductance in the Context of Automotive MOSFETs<\/h3>\n

Inductance is a fundamental property in electrical circuits, representing the ability of a conductor to store energy in a magnetic field when an electric current flows through it. In automotive applications, inductance can arise from various sources, including the wiring harnesses, printed circuit board (PCB) traces, and the MOSFETs themselves.<\/p>\n

When it comes to automotive grade MOSFETs, which are designed to operate in the harsh environment of vehicles, inductance can have a profound impact on their performance and reliability. Automotive systems demand high efficiency, safety, and durability, and any deviation from optimal performance can lead to serious consequences, such as reduced fuel efficiency, malfunctioning of critical components, or even safety hazards.<\/p>\n

Switching Losses<\/h3>\n

One of the primary effects of inductance on automotive grade MOSFETs is increased switching losses. During the switching process, the MOSFET transitions between the on and off states. When an inductance is present in the circuit, the current through the MOSFET cannot change instantaneously due to the energy stored in the magnetic field of the inductor.<\/p>\n

This results in a situation where both the voltage across the MOSFET and the current through it are non – zero during the switching transition, causing power dissipation known as switching losses. Higher inductance values lead to longer switching times and increased switching losses. These losses generate heat, which can raise the temperature of the MOSFET and potentially degrade its performance or even cause thermal breakdown over time.<\/p>\n

For example, in an electric vehicle’s powertrain system, where high – power MOSFETs are used to control the flow of electricity to the motor, excessive switching losses due to inductance can reduce the overall efficiency of the system. This means more energy is wasted as heat, resulting in shorter driving ranges and increased battery consumption.<\/p>\n

Voltage Overstress<\/h3>\n

Inductance can also cause voltage overstress on automotive grade MOSFETs. When the current flowing through an inductor is interrupted, such as when the MOSFET turns off, a back – electromotive force (EMF) is generated according to Faraday’s law of electromagnetic induction. This back – EMF can cause a significant voltage spike across the MOSFET.<\/p>\n

Automotive grade MOSFETs are typically rated for a maximum voltage, and these voltage spikes can exceed this rating, leading to overstress and potential failure of the device. Voltage overstress can cause damage to the MOSFET’s gate oxide, leading to increased leakage current, reduced breakdown voltage, and ultimately, device failure.<\/p>\n

In automotive applications, voltage spikes can be particularly dangerous as they can also affect other components in the circuit, leading to system malfunctions. For instance, in a vehicle’s lighting control system, a voltage spike caused by inductance can damage the MOSFET controlling the lights, resulting in intermittent or complete failure of the lighting system.<\/p>\n

Oscillations and EMI<\/h3>\n

Inductance in combination with the parasitic capacitance of the MOSFET can create an LC (inductor – capacitor) resonant circuit. This can lead to oscillations in the circuit, which can cause electromagnetic interference (EMI). EMI is a major concern in automotive applications as it can interfere with the operation of other electronic systems in the vehicle, such as the radio, navigation system, or communication modules.<\/p>\n

The oscillations can also cause additional stress on the MOSFET, leading to increased power losses and potential degradation of the device. Automotive manufacturers are required to comply with strict EMI standards, and excessive EMI caused by inductance – related oscillations can make it difficult to meet these requirements.<\/p>\n

Mitigating the Effects of Inductance<\/h3>\n

As a supplier of automotive grade MOSFETs, we understand the challenges posed by inductance and have developed several strategies to mitigate its effects.<\/p>\n

Low – Inductance Packaging<\/h4>\n

We offer MOSFETs in low – inductance packages. These packages are designed to minimize the internal inductance of the device, reducing switching losses and voltage overstress. By carefully optimizing the package design, we can reduce the length of the internal leads and the parasitic inductance associated with them.<\/p>\n

Snubber Circuits<\/h4>\n

Snubber circuits can be used to suppress voltage spikes caused by inductance. These circuits typically consist of a resistor and a capacitor connected in series across the MOSFET. The capacitor absorbs the energy from the inductive spike, while the resistor dissipates this energy over time. We provide detailed application notes and design support to help our customers implement effective snubber circuits in their automotive systems.<\/p>\n

EMI Filtering<\/h4>\n

To combat EMI caused by inductance – related oscillations, we recommend the use of EMI filtering components. These can include inductors, capacitors, and ferrite beads, which can be added to the circuit to suppress high – frequency noise. Our technical team can assist customers in selecting the appropriate EMI filtering components based on their specific application requirements.<\/p>\n

Importance of Quality and Reliability in Automotive Grade MOSFETs<\/h3>\n

In the automotive industry, quality and reliability are of utmost importance. Automotive grade MOSFETs are used in critical applications, such as engine control units, airbag systems, and electric power steering. Any failure of these components can have serious safety implications.<\/p>\n

At our company, we adhere to the highest quality standards in the production of automotive grade MOSFETs. Our manufacturing facilities are equipped with state – of – the – art equipment and are certified to ISO\/TS 16949, the international standard for automotive quality management systems. We conduct rigorous testing on all our products to ensure that they meet the strict requirements of the automotive industry.<\/p>\n

Conclusion and Call to Action<\/h3>\n

Inductance can have a significant impact on the performance and reliability of automotive grade MOSFETs. From increased switching losses and voltage overstress to oscillations and EMI, the effects of inductance can pose challenges in automotive applications. However, with the right products and technical support, these challenges can be effectively addressed.<\/p>\n

<\/p>\n

As a trusted supplier of automotive grade MOSFETs, we are committed to providing high – quality products and comprehensive technical solutions to our customers. Whether you are an automotive engineer looking for solutions to inductance – related problems or a procurement manager seeking reliable MOSFET suppliers, we are here to help.<\/p>\n

Rectifer<\/a> If you are interested in learning more about our automotive grade MOSFETs or discussing how we can help you address inductance challenges in your automotive applications, please contact us for a detailed consultation. We look forward to working with you to drive innovation and reliability in the automotive industry.<\/p>\n

References<\/h3>\n