TDK has extended its EPCOS ThermoFuse family of fuse-protected varistors with the new compact NT14 and NT20 series. The components feature a footprint that fits into existing circuit board layouts.
The NT14 series (disk diameter 14 mm) is designed to absorb maximum surge currents with an 8/20-µs pulse of 6 kA at rated voltages of between 130 VRMS and 680 VRMS, while the NT20 series (disk diameter 20 mm) has a surge current capability with an 8/20-µs pulse of 10 kA at rated voltages of between 130 VRMS and 750 VRMS.
The NT14 and NT20 series offer maximum energy absorption of up to 220 J and 480 J for 2 ms, respectively. Both series are available in 2-leaded and 3-leaded types, with the third lead used to monitor whether the fuse has been activated. Thanks to their thermal resistance and flame-retardant design of the epoxy coating, the ThermoFuse NT series meet UL 94 V-0 requirements, and are also listed as Type 4CA in UL 1449, 4th edition.
ThermoFuse varistors are uniquely designed disk varistors that are connected in series with a thermally coupled fuse and are therefore intrinsically safe. If the varistor overheats, the patented thermal fuse trips and isolates the varistor from the grid with unrivalled dependability. This prevents any potential damage on the PCB or to components located near the varistor, and increases the reliability of the equipment to be protected.
With their compact dimensions and excellent surge current capability over a broad range of voltages, the NT types are suitable for use in a wide range of applications, such as ballasts for lighting, home appliances, power supplies, inverters for solar installations, frequency converters for drives, and smart meters. They can also be used for the general protection of electrical wiring and installations.
Electronic News Digest
News
A brief synopsis of current global news relating to the electronic engineering fields with regards to company finances, general company news, and engineering technologies.
Read more...4000 A containerised DB for power project
News
Power Process Systems has successfully completed the design, fabrication, and commissioning of a 4000 A containerised distribution board for a wind/PV solar hybrid renewable energy project.
Read more...Datacentrix Industrial Indaba 2025
News
Datacentrix recently hosted its inaugural Industrial Indaba 2025, where industry leaders explored how digitalisation, resilience, security and compliance are shaping the future of sustainable industrial operations in Africa.
Read more...RS brings solar light to 150 000 people RS South Africa
News
The company’s three-year partnership with SolarAid aims to raise £1 million through corporate donations, matched funding, product contributions, and fundraising to accelerate access to safe, sustainable energy.
Read more...Microchip and AVIVA Links collaboration Altron Arrow
News
Microchip and AVIVA Links have achieved groundbreaking ASA-ML interoperability, accelerating the shift to open standards for automotive connectivity.
Read more...Distribution partnership with MacDermid Alpha Testerion
News
MacDermid Alpha Electronics Solutions India Private Limited has announced that as of 01 September 2025 Testerion will be the sole importer and distributor of their products to the South African market.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version