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That depends, you should look it up in the datasheet. For some thyristors it's as low as 6V

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11y ago
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Anonymous

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3y ago
Please explain what is reverse breaker voltage 

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Q: What is reverse breakover voltage in scr?
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Is fwd break over voltage is greater than reverse breakdown voltage i.e VboVbr?

forward breakover voltage is slightly smaller than reverse breakdown voltage


What is forward breakover voltage?

forward-breakover voltage - the voltage at which a device enters the forward-blocking region. The voltage at which the SCR enters the forward-condition region. The value of Vbr(f) is maximum when (Ig=current in gate) Ig=0 and is designate Vbr(f0). When the gate current is increased, Vbr(f) decrease and is designated Vbr(f1), Vbr(f2), and so on, for increasing steps in gate current (Ig1, Ig2, and so on).


Which diodes has a characteristic curve with both a forward and a reverse breakover?

Schottky


What is a threshold voltage in scr?

the voltage at which the current conduction occur


What is firing angle in thyristors?

A sinusoidal AC waveform is divided up into 360 degrees, with the positive half and the negative half of the waveform combined into a kind of circle. The firing angle simply refers to the point on the waveform, as measured in degrees (thus 'angle') which the thyristor is triggered into conduction. Answer2: Firing angle is the phase angle of the voltage at which the scr turns on. There are two ways of turning an scr on..one is by applying a gate current or by applying a voltage across the scr until it becomes greater than the breakover voltage.... Answer3: Thyristor need gate current and voltage to make it conduct. The firing angle is the sinusoidal increasing voltage. As it rises a voltage is reached with enough power to fire to trigger the gate. That voltage is the angle considering that a sinusoidal is 360 degrees per cycle.

Related questions

Which voltage is greater in thyristor whether forward breakover or reverse breakdown voltage?

One voltage is greater in thyristor whether forward breakover or reverse breakdown voltage. The greater of the two voltages in thyristor is forward breakover voltage.


Which voltage is greater in thyristor whether forward break over or reverse breakdown voltage?

It is stated that one of the voltage is greater in thyristor whether it be forward breakover or reverse breakdown voltage. It is also stated that the greater of the 2 voltages in thyristor is the forward breakover voltage.


Is fwd break over voltage is greater than reverse breakdown voltage i.e VboVbr?

forward breakover voltage is slightly smaller than reverse breakdown voltage


What is avalanche break down in scr?

A: As the reverse voltage is applied to the SCR increases at a certain point the device will start to conduct that is defined as the breakdown voltage for that device


What happens if gate voltage of an ON scr is decreased?

A: Nothing after an SCR conduct the gate has no more control to shut it off. So how do we shut off an SCR two way reverse the voltage on the SCR or reduce the current below the holding current. SCR are not DC friendly once on they stay on until see above


What is breakover voltage?

forward-breakover voltage - the voltage at which a device enters the forward-blocking region. The voltage at which the SCR enters the forward-condition region. The value of Vbr(f) is maximum when (Ig=current in gate) Ig=0 and is designate Vbr(f0). When the gate current is increased, Vbr(f) decrease and is designated Vbr(f1), Vbr(f2), and so on, for increasing steps in gate current (Ig1, Ig2, and so on).


What is forward breakover voltage?

forward-breakover voltage - the voltage at which a device enters the forward-blocking region. The voltage at which the SCR enters the forward-condition region. The value of Vbr(f) is maximum when (Ig=current in gate) Ig=0 and is designate Vbr(f0). When the gate current is increased, Vbr(f) decrease and is designated Vbr(f1), Vbr(f2), and so on, for increasing steps in gate current (Ig1, Ig2, and so on).


Which diodes has a characteristic curve with both a forward and a reverse breakover?

Schottky


What is a threshold voltage in scr?

the voltage at which the current conduction occur


What is firing angle in thyristors?

A sinusoidal AC waveform is divided up into 360 degrees, with the positive half and the negative half of the waveform combined into a kind of circle. The firing angle simply refers to the point on the waveform, as measured in degrees (thus 'angle') which the thyristor is triggered into conduction. Answer2: Firing angle is the phase angle of the voltage at which the scr turns on. There are two ways of turning an scr on..one is by applying a gate current or by applying a voltage across the scr until it becomes greater than the breakover voltage.... Answer3: Thyristor need gate current and voltage to make it conduct. The firing angle is the sinusoidal increasing voltage. As it rises a voltage is reached with enough power to fire to trigger the gate. That voltage is the angle considering that a sinusoidal is 360 degrees per cycle.


What is the diffirence of silicon unilateral switch and silicon bilateral switch?

SUS - Silicon Unilateral Switchis a type of thyristor used as a breakover device that conducts current in only one direction, it has a third terminal that is used to alter the breakover voltage if connected to a zener diode.SBS - Silicon Bilateral Switchis a type of thyristor used as a breakover device which is capable of triggering triacs, it has a lower breakover voltage compared to triacs.


How can an SCR be made to conduct?

An SCR has three legs. The anode, cathode, and gate. The control voltage sent to the gate will allow the SCR to conduct.