Many small DC motors with brushes and permanent magnets for field magnets are used for devices like windshield wipers, power windows, and power seats in automobiles. A DC motor with small brushes is simple in structure and low in cost and has a large starting torque. But when it rotates, a spark is discharged at the point of contact between brushes and commutators. This causes noise and wears the brushes. A ring varistor can be attached to a commutator and used as a surge protection device to absorb and reduce noise, and protect the contacts.
TDK's ring varistor VAR-18 series use a strontium titanate semiconductive ceramic material whose electrical characteristics and physical performance are greatly improved compared to the conventional levels. This lineup covers a wide variety of shapes and dimensions as well as conventional sizes to meet various requirements. This flexibility and ease of use are great advantages for this lineup.

With the rapid advancement of Advanced Driver Assistance Systems (ADAS) and autonomous driving technologies, the number of sensing devices such as cameras, radars, and microphones installed in vehicles is increasing significantly. As high-performance components proliferate, Tier 1 manufacturers face three major challenges: ensuring high reliability, reducing PCB footprint for miniaturization, and achieving cost reduction.
Among these, protection against electrostatic discharge (ESD) is a critical factor that directly impacts the stability of in-vehicle communication systems.
To address these needs, TDK offers the AVRH Series of chip varistors as ESD protection components for automotive communication applications, providing a smaller and higher-performance alternative to conventional TVS diodes.

Die TDK Corporation führt fünf neue SMD-Vielschichtvaristoren (MLVs) ein. Als Branchenneuheit zeichnen sich diese Bauelemente durch einen kleineren CO2-Fußabdruck aus und erfüllen gleichzeitig die anspruchsvollen Qualifikationsanforderungen der Automobilindustrie. Diese Bauelemente sind die ersten Vertreter der neuen X-Serie von TDK, die kontinuierlich mit Produkten für Automobilanwendungen sowie für Industrie- und Unterhaltungselektronik erweitert wird. Damit erfüllt die X-Serie sowohl die wachsende Nachfrage nach klimafreundlichen Produkten als auch die Forderung des Marktes nach kostengünstigen Lösungen, ohne Abstriche bei der von TDK gewohnten Zuverlässigkeit und Leistung zu machen.

For electronic device design, it is important to allow necessary signals to pass while to block unwanted signals (noise). Some pattern designs of a printed circuit board (PCB) can be influenced by ESD (electrostatic discharge). By visualizing the behavior of ESD intruding into the PCB, we can confirm the effectiveness of ESD countermeasures for the PCB design. In this article, we introduce effective GND pattern designs and the use of ESD protection components to enhance ESD robustness.

Protective measures are essential for ESD (Electrostatic Discharge) to prevent malfunctions or failures in electronic devices. However because these components are mounted directly on the line, selecting inappropriate ESD protective components can affect the signal on the line even under normal conditions. Examples include high-speed communication lines with differential signals, such as those used in automotive communications' CAN (Controller Area Network) and Ethernet. These can exhibit significant impacts, not only deteriorating communication quality but also potentially affecting EMC (Electromagnetic Compatibility) performance in the worst cases.

Die TDK Corporation präsentiert zwei neue Varistor-Serien in SMD-Ausführung. Die Bauelemente beider Familien sind für einen breiten Betriebsspannungsbereich von 175 VRMS bis 460 VRMS, entsprechend 225 VDC bis 615 VDC, verfügbar. Während die Typen der Serie B72210M*, die den bedrahteten S14-Scheibenvaristoren entsprechen, eine Stoßstrom-Belastbarkeit von 6000 A bieten, haben die der Serie B72214M*, die den bedrahteten S20-Scheibenvaristoren entsprechen, eine hohe Stoßstrom-Belastbarkeit von 10.000 A. Alle Bauelemente sind für eine hohe Betriebstemperatur von maximal +125 °C und eine extrem feuchte Wärmeumgebung (85% relative Luftfeuchtigkeit bei +85 °C) ausgelegt.

Die TDK Corporation präsentiert ein Sample Kit (B74999T9999M099), das aus zehn verschiedenen Typen besonders kompakter TVS-Dioden besteht. Fünf davon kommen aus der General-Purpose-Serie GP, die dem Schutz vor Überspannungen an Anwendungen wie Smartphones, Tablets, Notebooks, Wearables und Netzwerk-Komponenten dienen; fünf weitere stammen aus der High-Speed-Serie ULC, die für besonders empfindliche Highspeed-Schnittstellen (z. B. USB-C, Thunderbolt, HDMI, Display Port, MIPI, FireWire, DVI, S-ATA oder SWP/NFC) abgestimmt sind. Diese Schutzdioden werden in den äußerst kompakten Gehäuseformen WL-CSP01005 (400 x 200 μm2) und WL-CSP0201 (600 x 300 μm2) gefertigt.

Find the appropriate overvoltage protection device by circuit type.

Find the optimal varistor and arrestor products for you based on maximum surge currents and maximum capacity circuit voltages.

TDK’s chip varistors are ESD protection components that can solve various needs that are specific to audio lines. We shall now explain the various advantages providing the optimal solutions for the audio lines of smartphones.