The first thought in semiconductors is often computer chips such as RAM or microprocessors. However, electrical engineering is more diverse and power electronics in particular is playing an increasingly important role. As a distributor, CapComp now has NAINA Semiconductor in its portfolio, a very efficient and experienced manufacturer who can offer a very competitive range of power electronics components. These complement our product range of passive components for power and energy management.
Semiconductors are of great importance for electrical engineering. Their conductivity can depend on the direction of current flow, a threshold value (threshold voltage) or a control signal. Diodes or bridge rectifiers are used to rectify AC voltages of lower power. Schottky diodes are often used for particularly fast, i.e. high-frequency switching operations. Z-diodes, formerly Zener diodes, are particularly suitable for limiting to defined limit values. If power control (e.g. speed of motors or lamp dimmers) is required, controllable elements such as the thyristor, IGBT or MOSFET are used.
These products optimally complement our range of passive components ULTRACAP, electrolytic capacitors, inductors and voltage converters, which is focused on power and energy management.
Standard recovery diodes are divided into rectifier diodes and fast diodes. They are optimized for low conduction losses and can handle very high currents. Rectifier diodes are divided into normal recovery diodes and avalanche diodes and are generally used for AC-DC conversion.
A Fast Recovery Diode (FRD) is a diode with PN junction that can switch between on and off mode for an extremely short time. In these diodes, which include Ultra Fast Recovery Diodes and Fast Recovery Epitaxial Diodes (FRED), there is a correlation between the drop in forward voltage, reverse voltage and time. The various Fast Recovery Diodes differ in this correlation (di/dt).
Due to the faster switching between the forward and reverse voltage range, which is expressed in the on and off switching behaviour and is called the reverse recovery time, the reverse current and the power dissipation of the FRD diode are reduced. Fast recovery diodes are relatively robust PN diodes, which are used as power diodes in switching power supplies, for example. Their off-delay times are a few hundred nanoseconds, in the case of ultra fast recovery diodes even about 10 ns. FRD diodes can be used up to over 1,000 volts and switch currents of several hundred amperes.
A Schottky diode (hot-carrier diode) is a special diode that does not have a p-n junction (semiconductor-semiconductor junction), but a (blocking) metal-semiconductor junction. The interface between metal and semiconductor is called Schottky contact or Schottky barrier (due to potential barrier).
The Schottky diode is a rectifier. The diode consists of a material mix. This is decisive for the formation of a depletion zone in the interface of the semiconductor. This type of diode is used in high and very high frequency technology.