MOS Turn-Off Thyristor (MTO)

MTO stands for MOS turn-off thyristor. It is a high-power bipolar MOS thyristor that constitutes both MOSFET and Gate Turn-off thyristor (GTO). It was developed as a replacement for GTO. It is a latching device that outperforms MCT and IGBT when it comes to power and blocking voltages. It was developed by Silicon Power Company (SPCO) … Read more

TRIAC – Operation, symbol, circuits & applications

A TRIAC or TRIode for Alternating Current is a three-terminal bidirectional thyristor, meaning that can conduct current in both directions when activated properly. It is used in AC switching applications. It can be considered as two SCRs connected in antiparallel. Unlike a silicon-controlled rectifier, it is capable of conducting positive and negative cycles of electric … Read more

Thyristors and their types

Thyristors are high-speed semiconductor switching devices that are made up of four layers of alternating p and n-type materials. They are used in AC/DC switching and AC power control applications. The thyristor symbol is a diode symbol that has three terminals, the gate, anode, and cathode. Silicon Controlled Rectifier (SCR) Silicon Controlled Rectifier (SCR) is … Read more

SCR – Silicon Controlled rectifier

A Silicon Controlled Rectifier (SCR) is a unidirectional semiconductor device that can be triggered into conduction by applying a positive gate current. It led to tremendous advancements in power semiconductor devices. They are also known as phase-control thyristors. They are high-speed semiconductor switching devices, similar to Shockley diodes but with an extra terminal. They generally … Read more

Diode ratings – How to understand a diode datasheet?

Datasheets released by diode manufacturers contain a number of diode ratings. In order to select diodes for an application, it is important to understand all the ratings listed in the datasheets. Here is a list of all diode ratings that you must remember always. Diode ratings Forward voltage drop (Vf) The voltage drop measured across … Read more

What is PIV rating in a diode?

PIV stands for ‘Peak Inverse Voltage’. It refers to the maximum reverse bias voltage a semiconductor diode or other semiconductor devices can withstand without damaging themselves. The peak inverse voltage is also known as peak reverse voltage. PIV rating of a diode is temperature-dependent. It increases with an increase in temperature and decreases with a … Read more

PN Junction Diodes

What is a diode? A diode is an electrical component that allows the current to flow in only one particular direction. Diodes are made up of silicon and germanium. They are used to protect the circuit by limiting the voltage and transforming the AC voltage into DC voltage. There are many types of diodes and … Read more

Zener diodes – Operation, Symbol and V-I Characteristics

What are zener diodes? Zener diodes are silicon semiconductor devices that can allow the passage of current in both forward and reverse directions. Unlike p-n junction diodes, they are designed in such a way to handle the reverse breakdown voltage without damaging themselves. They are heavily doped than normal p-n junction diodes, thereby forming a … Read more