Category | Protection

Secondary Thermal Protection for Power Electronics

Posted on 13 June 2019

      Preventing thermal runaway resulting from failed power FETs in universal dimmers that are embedded in walls of buildings helps improve the lighting systems’ safety and performance. By Philippe Difulvio, Application Engineering Manager, and Faraz Hasan, Sr. Global Strategic Business Manager for Industrial, Appliance, Lighting, TE Circuit Protection   In recent years, a [...]

Protecting PoE Equipment from Overvoltage and Overcurrent Damage

Posted on 01 March 2019

      Thyristor surge suppression devices meet the immunity and test requirements of IEEE 802.3AF standard The evolution of Power over Ethernet (PoE) continues to expand the functionality of Ethernet technology by supplying reliable DC power over the same cables that currently carry Ethernet data. PoE, which is modeled after the technology used by [...]

Introduction to IEC 60269

Posted on 01 May 2019

      gS Type Fuses In circuits where there are no overloads requiring the gG fuse curve it is possible to use a gS fuse and optimise the protection by reducing the peak current and then improving the coordination with all associated switches and components. By Charles Müllert, Ferraz Shawmut   The gS type [...]

Circuit Protection Designs for a Connected World

Posted on 01 March 2019

      Integrating overcurrent and overvoltage protection The demand for more and more features and functions in consumer electronics presents new challenges to design engineers. Circuit protection device manufacturers must also continue to deliver new solutions to support emerging technologies and meet new system level protection requirements. By Adrian Mikolajczak, Tyco Raychem Circuitprotection   [...]

Line Voltage Rated PPTC Devices

Posted on 01 July 2019

       Protection for appliance motors and transformers The popular PPTC (polymeric positive temperature coefficient) resettable circuit protection device is now available in line voltage ratings and offers a simple, cost-effective alternative to fuses and bimetal protectors used in home and professional-grade appliance motors. By Faraz Hasan, Global Industrial and Appliance Marketing Manager, Raychem Circuit [...]