Multilayer varistors boast high surge current capability

2nd July 2015
Posted By : Barney Scott
Multilayer varistors boast high surge current capability

TDK presents its high-surge series of EPCOS multilayer varistors, characterised by their high surge current capability, ranging from one surge of up to 5000A to ten surges of up to 3500A, with a pulse of 8/20µs and an operating voltage of up to 65VDC. The SMD components are available in case sizes EIA1210 through EIA2220 and require less space than wired types or semiconductor-based solutions, while offering the same performance and reliability.

A high-performance ceramic material set and an improved component design have made the further miniaturisation possible. This means that, in comparison with conventional technologies, current densities of three times higher can be achieved. On this basis, TDK now manufactures protection components in the EIA 1210 case size that offer the same performance as existing EIA 2220 types, which are three times larger. Despite their compact design, the maximum energy absorption for EIA 2220 components is about 15J for a pulse of 2ms.

In addition, the rugged varistors are resistant to thermo-mechanical stress, offering a high surge current capability even at 125°C, a temperature at which other technologies can only be operated with derating. The protection components are designed for a lead-free reflow soldering process. Applications for the varistors include power supplies for telecomms and PoE systems.


You must be logged in to comment

Write a comment

No comments




Sign up to view our publications

Sign up

Sign up to view our downloads

Sign up

Girls in Tech | Catalyst | 2019
4th September 2019
United Kingdom The Brewery, London
DSEI 2019
10th September 2019
United Kingdom EXCEL, London
EMO Hannover 2019
16th September 2019
Germany Hannover
Women in Tech Festival 2019
17th September 2019
United Kingdom The Brewery, London
European Microwave Week 2019
29th September 2019
France Porte De Versailles Paris