Chip-Varistoren und TVS-Dioden werden häufig als Überspannungsschutz-Bauteile verwendet.

Leistungsstarke Lasten sind beim Einschalten für Sicherungen und Bauelemente ein großer Stressfaktor, da hierbei sehr hohe Ströme fließen. Um diese zu vermeiden, bietet TDK keramische EPCOS Einschaltstrom-Begrenzer auf der Basis von NTC- und PTC-Thermistoren, die auch kombiniert eingesetzt werden können.

Die TDK Corporation hat ihre Produktfamilie EPCOS ThermoFuse™ aus Varistoren mit Überspannungsschutz um die neuen kompakten Serien NT14 und NT20 erweitert. Mit ihren geringen Abmessungen passen die neuen ThermoFuse Bauelemente in vorhandene Platinen-Layouts.

SMD or chip varistors are voltage-dependent resistors based on ceramic multilayer technology. They are widely used to protect electronic circuits in consumer devices and telecom, industrial and automotive applications against transient overvoltages, such as electrostatic discharges (ESD) and surge transients.

Chip varistors have both surge absorption capabilities and noise suppressing effects.

TDK’s chip varistors in the AVR series, which are made with our own materials, feature high resistance to repeated surges. Products that substitute Zener diodes in compact devices such as solenoid valves and stepping motors, which are rapidly and frequently turned on and off, are also available.

NTC thermistors are heat-sensitive resistor elements of which resistance values rapidly decrease with rise of temperature. With this property, they are used as temperature protection devices for protecting circuits from overheating as well as temperature sensors.

Surge arresters are GDT (gas discharge tube) voltage protection devices. TDK offers a strong lineup of products with a variety of surge current capabilities ranging from lightning protection for power lines to lightning protection for signal lines.

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.

This material describes the characteristics of each protection component, as well as the differences between an MLCC and MLV.