As ADAS/ECU systems grow more sophisticated and xEV voltage levels continue to rise, automotive power circuits must address not only higher capacitance requirements but also countermeasures against cracking caused by board flexure stress and temperature cycling, heat generation, and mounting reliability.
The CA series low-resistance metal-terminal multi-array MLCC Megacap features a structure in which MLCCs are arrayed horizontally in multiple units, combined with optimized metal terminals, meeting the high capacitance, low ESR, and high reliability demands of automotive applications. In addition to automotive-grade products, general-grade products are also available, covering a wide range of applications from automotive equipment to consumer and industrial devices.
This article organizes the key points needed for adoption consideration from the perspectives of CA series structure and application.

In recent years, driven by the expansion of AI and cloud demand, data center servers have become more highly integrated and higher performing, causing a rapid rise in power density per rack/server. This requires PSU (power supply unit) and intermediate bus converters (IBC) to use components with higher efficiency, reliability, and density. In particular, the performance and form factor of passive components such as MLCCs (multi-layer ceramic capacitors) have become key design constraints. In this article, considering these trends, we introduce our lineup of MLCC products for PSUs and IBCs.

Power requirements are increasing in applications such as electric vehicles (EVs) and servers, leading to the growing adoption of Wide Bandgap (WBG) power semiconductors like SiC and GaN. These next-generation power semiconductors are instrumental in downsizing and increasing the efficiency of electronic equipment due to their high-speed switching and low on-resistance. On the other hand, snubber circuits have become increasingly important for protecting switching elements and as EMI countermeasures against overvoltage (surge voltage) and ringing caused by high-speed switching.
This application note introduces the utility of Multilayer Ceramic Capacitors (MLCCs) in high-voltage snubber circuits, key considerations for their selection, and TDK's evaluation examples under high dV/dt conditions. We hope this serves as a valuable reference for those considering MLCCs for snubber circuit designs.

EMC (Electromagnetic Compatibility) refers to the ability of electronic devices and systems to operate normally in an electromagnetic environment without interfering with other devices. This means that the electromagnetic energy emitted by electronic devices does not adversely affect other devices, nor is it affected by external electromagnetic energy.
In the modern technological society, many electronic devices are used at the same time: smartphones, computers, communication devices, medical equipment, cars, etc. EMC is essential for these devices to function efficiently and safely without adversely affecting each other.
Ensuring EMC includes minimizing electromagnetic interference (EMI) and managing electromagnetic susceptibility (EMS). To achieve this, measures such as shielding and filtering, proper design, and conformance testing are required. By taking these measures, you can increase the reliability of your products, meet regulatory standards, and improve your product's market competitiveness.
EMC is an important factor to consider from the very beginning of product development, and it is becoming increasingly important as technology innovates.

In recent years, the adoption of automotive 48V power supply systems has been rapidly advancing in the automotive industry. Compared to conventional 12V systems, automotive 48V power supply systems offer significant advantages such as reduced power loss, improved energy efficiency, and simplified wiring, which contribute to lower environmental impact. As a key technology supporting the electrification and enhanced performance of next-generation vehicles, the automotive 48V power supply system is becoming increasingly widespread.
However, the higher voltage of automotive 48V power supply systems tends to increase noise levels, making noise control and EMC countermeasures more critical than ever. Insufficient EMC measures can lead to malfunctions and reduced reliability of automotive electronic devices, so effective noise control and EMC solutions are essential.
This solution guide introduces the latest examples of noise control and EMC countermeasures for automotive 48V power supply systems, featuring practical EMI suppression cases using our noise countermeasure components applied to DC/DC converters in automotive 48V power supply systems. If you are facing challenges with noise control or EMC solutions for automotive 48V power supply systems, we invite you to refer to this guide.

TDK has recently expanded its lineup of 3-terminal feedthrough filters, known as the "YFF Series."
With advancements in automotive electronic systems aimed at enhancing safety, comfort, and infotainment capabilities, there is an increasing demand for measures to prevent system malfunctions.
To suppress voltage variation and high-frequency noise, which can cause such malfunctions, numerous capacitors are typically employed. However, the trend toward miniaturization of these systems raises concerns about mounting space limitations due to the increased number of components.
To address these challenges, 3-terminal feedthrough filters, characterized by low ESL (Equivalent Series Inductance), are gaining significant demand. Their high noise suppression effectiveness is expected to reduce the number of components and improve performance characteristics.

Die TDK Corporation stellt die X1-Kondensatoren der EPCOS-Serie B3291xH/J4 vor, die elektromagnetische Störungen (EMI) in anspruchsvollen Automobil- und Industrieanwendungen mit bis zu 480 V Wechselspannung filtern. Von der hohen Feuchtigkeitsbeständigkeit der Kondensatoren profitieren unter anderem PV-Wechselrichter und Onboard-Ladegeräte (OBCs) für Elektrofahrzeuge. Diese Anwendungen müssen oft bei hohen oder niedrigen Temperaturen und hoher Luftfeuchtigkeit funktionieren. Mit einer Belastbarkeit von 1000 V (DC) sind diese Kondensatoren für die EMV von Elektrofahrzeug-Plattformen eine gute Wahl.

Die X1-Kondensatoren bestehen den THB-Test (Temperatur, Feuchtigkeit, Vorspannung) bei +85 °C, 85% relativer Luftfeuchtigkeit und 1000 Stunden bei 380 V (AC) und 1000 V (DC). Sie sind für den Betrieb bei Temperaturen bis +110 °C ausgelegt.

Ausgestattet mit selbstheilenden Eigenschaften, bietet die Serie Kapazitäten von 15 nF bis 10,0 µF und Abmessungen von 18,0 x 10,5 x 5,0 mm bis 57,5 x 57 x 45 mm. Das Anschlussraster variiert je nach Kapazität zwischen 15 mm und 52,5 mm. Die größten Modelle besitzen vier Kontaktstifte für eine erhöhte Stabilität auf der Leiterplatte. Zertifiziert sind alle Produkte nach ENEC, UL und CSA.

On Board Chargers (OBCs) installed in electric vehicles are becoming increasingly powerful, with an output power of 22 kW. Even at higher power output levels, it is not acceptable to increase the size of the OBC itself, so compact design is required. Capacitors for the resonant circuit function are required to have high withstand voltage and low loss products that can withstand higher power densities than conventional products.
In order to meet this demand, TDK has released a new autograde C0G MLCC series with a rated voltage of 1250 V.

Through an example of the operation of a resonant capacitor in an LLC resonant converter, we will introduce why we recommend a 1250V rated C0G MLCC.

Mit dem wachsenden Markt für elektrifizierte Fahrzeuge (EVs) steigt die Nachfrage nach Onboard-Chargern (OBCs) schnell an. OBCs eröffnen die Möglichkeit, Fahrzeuge nicht nur an Schnellladestationen für Gleichstrom, sondern auch mit Wechselstromquellen in angemessener Zeit aufzuladen. Solche Systeme reichen derzeit bis zu 22 kW mit Betriebsspannungen bis zu 800 V. Die Aufgabe des OBC besteht darin, die Wechselspannung aus einer externen Quelle in eine spezifische Gleichspannung umzuwandeln, die auf den Anforderungen des Batteriemanagement-Systems basiert. Dadurch kann ein batterieschonender und schneller Ladevorgang erreicht werden. Insbesondere in abgelegenen Gebieten ohne ausreichende DC-Schnellladeinfrastruktur sind OBCs unverzichtbar, um die Attraktivität von E-Fahrzeugen zu steigern.Wegen der Komplexität solcher Systeme benötigen OBCs eine gewisse Kapazität, um die Gleichspannung, mit der die Batterie geladen wird, zu stabilisieren. Aluminium-Elektrolyt-Kondensatoren sind hier eine attraktive Lösung, da sie die wichtigsten Anforderungen erfüllen können, wie z. B. hohe Spannungen von bis zu 500 V, große Kapazitäten von bis zu 820 µF und hohe Ripplestrom-Belastbarkeit bei einem Betriebstemperaturbereich von -40 °C bis 105 °C.

Find the optimal products for you based on the capacitance, rated voltage, and features of each capacitor.

Find the optimal products for you based on the applications and product types.

Find the optimal products for you based on the product type, performance, temperature and useful life.