High voltage FRED increases the efficiency and reliability of power supplies

Rutronik adds the Optima and Speedy high-voltage FRED types with 600V and 1200V, respectively, from PANJIT to its range. The power diodes enhance the system efficiency of an application and are employed for low-frequency (Optima) or high-frequency (Speedy) applications. They provide low leakage current and improved EMI characteristics. The devices are excellent for rectifier or freewheeling circuits in various power applications, such as UPS systems, data centres, and household appliances.

The stability of power supply systems depends, among other things, on the electrical properties of the power diodes employed. It is, therefore, important to use the exact FRED suitable for each application, keeping in mind the target switching frequency of the planned application. Optima-type FREDs are appropriate for rectifier circuits such as high-power bridge diodes and bypass diodes, optimised for lower power losses at low VF, and predestined for low switching frequency applications. Speedy-FREDs, on the other hand, are more suited to high-frequency freewheeling switching in CCM boost PFC and Vienna PFC to attain maximum system efficiency. They convince with low reverse recovery time (trr), optimised Vf, and better trade-off performance between Vf and the reverse recovery charge (Qrr).

Typical application areas include power supplies for servers, data centres, PCs, networks, energy storage systems, battery management systems, industrial motors, welding equipment, digital TV, inverters for photovoltaic systems,  and household appliances.