High Voltage FRED from PANJIT at Rutronik:
Increased efficiency and reliability of power supply systems
The best FRED for each application.
Ispringen, July 2023 – Rutronik is adding the Optima and Speedy high-voltage FRED types with
600 V and 1200 V, respectively, from PANJIT to its product range. The power diodes improve the
system efficiency of an application and are used for low-frequency (Optima) or high-frequency
(Speedy) applications. They feature low leakage current and improved EMI characteristics.
PANJIT FREDs are ideal for rectifier or freewheeling circuits in a wide range of power
applications, such as UPS systems or data centers, but also household appliances. They are
available at www.rutronik24.com.
The stability of power supply systems depends, among other things, on the electrical properties of the
power diodes used. 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 suitable for
rectifier circuits such as high-power bridge diodes and bypass diodes, optimized for lower power losses
at low VF, and predestined for low switching frequency applications. Speedy-FREDs, on the other hand,
are more suitable for high-frequency freewheeling switching in CCM boost PFC and Vienna PFC to
achieve maximum system efficiency. They convince with low reverse recovery time (trr) and optimized
Vf, as well as better trade-off performance between Vf and the reverse recovery charge (Qrr).
More Features at a glance:
• Low leakage current
• Soft recovery characteristic for better EMI
• Best efficiency achievable
• Best combination with power switches
Possible applications:
• Power supply for servers, data centers, PCs, networks
• Energy storage systems
• Battery management systems
• Industrial motors
• Welding equipment
• Digital TV
Seite 2
Rutronik Elektronische Bauelemente GmbH
Industriestraße 2 | 75228 Ispringen
Management Board Rutronik:
Helmut Rudel, Thomas Rudel, Markus Krieg, Dr. Gregor Sommer,
Frank Altrock
• Inverters for photovoltaic systems
• Household appliances
A product overview and selection guide for FRED (VRRM = 600 – 1,200V, IF = 8 – 60A) can be
found at rutronik.com.