Silicon Controlled Rectifier (SCR) - Disc Type - Testing / Checking

Silicon Controlled Rectifier
An SCR, or Silicon Controlled Rectifier, is a semiconductor, or integrated circuit (IC), that allows the control of current using a small current. Basically, it is a simple direct current (DC) light switch
A silicon controlled rectifier or semiconductor controlled rectifier is a four-layer solid-state current-controlling device.

Where are SCR used?
SCRs are mainly used in devices where the control of high power, possibly coupled with high voltage, is demanded. Their operation makes them suitable for use in medium- to high-voltage AC power control applications, such as lamp dimming, power regulators and motor control.

How SCR is triggered?
To trigger, or fire, an SCR, voltage must be applied between the gate and cathode, positive to the gate and negative to the cathode. When testing an SCR, a momentary connection between the gate and anode is sufficient in polarity, intensity, and duration to trigger it.

The diodes are termed as uncontrolled rectifiers as they conduct (during forward bias condition without any control) whenever the anode voltage of the diode is greater than cathode voltage. ... Hence, the thyristor is also called as controlled rectifier or silicon controlled rectifier.

[dhananjaypimpale]

Thank you so much sir, .... Bahot hi easy way se explained kiya apane.
Hats of you.

[hitenkumarpatel]

Nice sir.... But aap sir multimeter se testing karte huye result table dikhaye to jyada maza aaega....or aek requist he ke sir aap sub electronics component ke testing video aese hi result table ke sath I am waiting your videos.... Thank યુ so much

[thangarasu]

Hi the faulty SCR testing method is fine. But pressure must be applied on both sides to check working of Disc SCR. Then you can peform testing.

[cemustun]

with these thyristors
example 120KVA
I want to use spot welding current transformer
guess IGT = 300 mA
How should the SCR trigger circuit be?

[brijendra.bishtt]

Dear Sir. You are wrong cathode and gate resistance should be in between 20 to 100 ohm. In normal SCR as you are using disc type SCR then gate and cathode showing open in good SCR. If you will fix it on heat sink then gate and cathode will show raistabne in between 20-100 ohm.

[ashishvitekar]

Very nice explain and very informative video's keep it up.
Thank you very much

[vishalthakur]

Sir gate aur cathode k beech mai agr continuty aa jaate to sahi hai ya faulty

[mukeshparmar]

Please make video for rectifier used in bleed liberation system

[aviray]

Bishant Kumar good job sir❤️, explained very well

[AbdulRehman-nfw]

Ager anode aur cathode k darmean short na ho belka diode show kery to pher scr ke kea condition ha

[sajidupn]

Sir thank you for your valuable time and informative video what should be the value of Anoid and Gate in resistance when I check it has Value 0.49

[D__Productions]

Sir scr ki gate pulse ki voltage kitni hoti h

[bharanaboyagama]

Are these results varies if we check this with pressure on anode and cathode

[parveensinghania]

Sr if i want to check the firing of the scr and also output the scr. Plss explain

[anushkakiranlamba]

Gate to cathode ohms Mai value aati hai sir

[ansarielectrical]

Sir esko assambly ke sath kaese cheak karenge

[sathapanaseemathong]

Excuse me sir.
If my SCR . AG=OL VDC, GC=0.004VDC, AC=OL VDC. It can work?

[bhagirathipal]

Inverter and converter scr chaining formula