Hello, readers welcome to a new post. We will discuss Difference between SCR and Triac. The SCR is a unidirectional semiconductor component used in different electronic projects while TRIAC is a two-directional semiconductor module. The full form of SCR is silicon-controlled rectifiers and TRIAC is a triode for AC.
These components are mostly used in power electronics circuits. Here we will cover different parameters to find the main differences. So let’s get started Difference between SCR and triac.
Difference between SCR and Triac
What is SCR
- The full form of SCR is a silicon-controlled rectifier that is the main part of the thyristors family.
- SCR is mostly used more than other types of thyristors like Diac SCS and TRIAC.
- SCR is created through the use of silicon and common use is to transform the AC to DC or say do the rectification like a diode.
- It is also used in other circuits like power regulation inversion.
- The SCR has features to regulate the large value of current and volts so used in industries
- In some cases, SCR and thyristors are considered as same but SCR is considered the proper subset of thyristor
- SCR is a unidirectional module and can be operated through the use of a positive current at its gate.
SCR Symbol
- The symbolic representation of SCR is like a diode with a gate pinout.
- It is a unidirectional device that passes the current single direction. It has three pinouts Anode cathode and gate. The gate is used to on and off the module
What is TRIAC
- The triac is also called bidirectional triode thyristors and bilateral triode thyristors which are 3 pins electronic devices that have features to move current in any direction.
- TRIAC is a group of thyristors similar to relay since managing the small value current and volts used to control larger current and volts
- Its main difference from SCR is that SCR conducts current in one direction and TRIAC in another direction.
- For triggering the TRIAC negative and positive andy volts can be given while for SCR positive needed.
- The structure of GTO is like the TRIAC but helps to manage more control through off-the-gate signal
- TRIAC is used as a switch for AC circuits. The use of a trigger at a controlled phase angle of AC in the circuit permits control of current passing in the output.
- Its common applications are speed control of universal motors, dimming lamps, and regulation of electric heaters. These are also called bipolar components.
SCR vs. TRIAC
- SCR regulates the current in one direction, and TRIAC conducts in two directions.
- Used for circuits where high power was used while TRIAC was not used.
- SCR uses a positive supply for operation, while TRIAC can work for positive and negative.
- SCR has one mode of operation and TRIAC has four.
- SCR is used in DC circuits and TRIAC in AC circuits.
- SCR needs polarity configuration due to one-direction modules, while TRIAC can be linked to any direction.
Is a TRIAC equivalent to SCRs?
- The TRIAC is equal to 2 SCRs connected in inverse parallel combination. It comes with basic 2 terminals and one gate terminal.
What is the difference between a thyristor and TRIAC?
- TRIA comes with the same triggering and latching features as compared to a thyristor and is different in the sense that it can be triggered in conditions of both voltage and current due to positive or negative signals.
What is the difference between SCR and thyristor?
- The thyristor comes with 4 layers that are in PNPN configuration. The thyristor comes with 3 electrodes: anode, cathode, and gate. A common type of thyristor is a silicon-controlled rectifier (SCR).
Can we use TRIAC in place of SCR?
- In reverse to SCR, TRIAC can be conductive in any direction. Without this issue, we can use triac in place of SCR.
What is the main function of TRIAC?
- TRIAC helps current flow in any direction with flow-varying polarity of gate voltage. The gate voltage can be taken from the AC voltage provided to TRIAC’s load terminals.
What is the function of SCR?
- SCR is used in circuits where control of high power exists at high voltage. The features for switching larger currents on and off make SCR the best to use for medium- to high-voltage AC power control circuits like lamp dimming, regulators, and motor control.
Why is SCR called rectifier?
- SCR is a rectifier that helps current flow in a single direction. That means they are not used alone for full-wave AC power control.
What is the main use of TRIAC?
- Triac is used for controlling motor speed. Since load current flows during both halves of the provided AC voltage motors, they move smoothly for rotational speeds.
Which is better, relay or TRIAC?
- Triac output comes with a longer working life as compared to relays. Since they are made with semiconductors and work millions of cycles.
What is the application of SCR and TRIAC?
- The SCR regulates current passing in the inverter, and gate voltage varies depending on the ON or OFF condition of the SCR. It is a chance to control power passing to load with the use of SCR. The TRIAC is a device with 3 terminals regulating current flow.
That is all about the Difference between scr and triac all details has explained if you have any queries ask in the comments. Thanks for reading have a nice day.
