Thyristors

What is a Thyristor?
A Thyristor is a four layer semiconductor device, also known as a silicon controlled rectifier (SCR) It is like a fast static switch and is good for controlling large amounts of power, they can also control the speed of DC motors.
A Thyristor usually consists of three electrodes: an anode (positive terminal), Cathode (negative terminal) and a gate. (You can also get thyristors with two or four leads). The gate is the main control terminal while the main current flows between the anode and cathode
The Thyristor is made of N type and P type materials. The N-type material is formed by doping an element with electrons to increase the number of negative charge-carrying electrons. The P-type material is also produced through doping, although the resulting charge-carrying electrons are positively charged. By alternating layers of P and N-type material, a semiconductor thyristor device is formed.
Thyristors are used to create a latching circuit. Thyristors can be turned on using the gate. It then turns off when the voltage across the anode-cathode drops back down to zero.
Types of Thyristor:
Silicon controlled rectifier (SCR) -The basic purpose of a SCR is to function as a switch that can turn on or off small or large amounts of power.
Silicon controlled switch (SCS) - Silicon Controlled Switch (SCS) is a device similar to a SCR, but it is designed to turn off when a positive voltage/input current pulse is applied to an additional "Anode gate"
Triac – Triac gets its name from Triode for alternating current Triacs are similar to SCRs but it conducts in both directions, (a bidirectional device). This means that it can switch AC and DC currents.
Four layer diode - A four layer diode has 2 pins and is similar to a voltage-sensitive switch. When the voltage between the two pins exceeds the breakdown voltage it turns ON, otherwise it’s OFF.
Diac- Diac is a mix of the words diode and ac switch it is similar to four-layer diode but it can conduct in both directions meaning it can contact both AC and DC currents.
Thyristors are used in applications such as motor speed controls, pressure control systems, light dimmers and liquid level regulators
What are Phase controlled Thyristors?
Thyristors are frequently used as phase-controlled current valves for AC to DC conversion and vice versa, operating at low frequencies In the conducting state, thyristors feature very low losses, making them ideal devices to efficiently control very high currents and energies.

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Description Price Rated Average On-State Current Thyristor Type Package Type Repetitive Peak Reverse Voltage Surge Current Rating Mounting Type Maximum Gate Trigger Current Maximum Gate Trigger Voltage Maximum Holding Current Pin Count Length Width Height Dimensions
RS Stock No. 165-5402
Mfr. Part No.TZ425N16KOFHPSA1
BrandInfineon
$322.00
Each (In a Tray of 3)
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425A PCT BG-PB501-1 1600V 14500A Panel Mount 250mA 1.5V 300mA 5 101mm 50mm 52mm 101 x 50 x 52mm
RS Stock No. 839-1313
Mfr. Part No.TZ425N16KOFHPSA1
BrandInfineon
$236.18
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425A PCT BG-PB501-1 1600V 14500A Panel Mount 250mA 1.5V 300mA 5 101mm 50mm 52mm 101 x 50 x 52mm
RS Stock No. 839-1379
Mfr. Part No.T560N12TOFXPSA1
BrandInfineon
$117.20
Each
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559A PCT BG-T4814K0-1 1200V 7100A Stud 200mA 2V 300mA 5 - - 14.5mm 48 (Dia.) x 14.5 (Height)mm
RS Stock No. 839-1367
Mfr. Part No.T430N16TOFXPSA1
BrandInfineon
$130.90
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433A PCT BG-T4214K0-1 1600V 5200A Stud 200mA 2V 300mA 5 - - 14.5mm 42 (Dia.) x 14.5 (Height)mm
RS Stock No. 839-1317
Mfr. Part No.TZ500N12KOFHPSA1
BrandInfineon
$240.28
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500A PCT BG-PB501-1 1200V 17000A Panel Mount 250mA 2.2V 300mA 5 101mm 50mm 52mm 101 x 50 x 52mm
RS Stock No. 839-1373
Mfr. Part No.T560N16TOFXPSA1
BrandInfineon
$131.15
Each
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559A PCT BG-T4814K0-1 1600V 8000A Stud 200mA 2V 300mA 5 - - 14.5mm 48 (Dia.) x 14.5 (Height)mm
RS Stock No. 145-9518
Mfr. Part No.TZ600N12KOFHPSA1
BrandInfineon
$271.29
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600A PCT BG-PB501-1 1200V 17000A Panel Mount 250mA 2.2V 300mA 5 101mm 50mm 52mm 101 x 50 x 52mm
RS Stock No. 839-1326
Mfr. Part No.TZ600N12KOFHPSA1
BrandInfineon
$272.10
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600A PCT BG-PB501-1 1200V 17000A Panel Mount 250mA 2.2V 300mA 5 101mm 50mm 52mm 101 x 50 x 52mm
RS Stock No. 839-1382
Mfr. Part No.T590N16TOFXPSA1
BrandInfineon
$167.68
Each
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590A PCT BG-T5726K-1 1600V 9400A Stud 250mA 2.2V 300mA 5 - - 26.5mm 58 (Dia.) x 26.5mm
RS Stock No. 839-1363
Mfr. Part No.T430N12TOFXPSA1
BrandInfineon
$116.00
Each
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433A PCT BG-T4214K0-1 1200V 5200A Stud 200mA 2V 300mA 5 - - 14.5mm 42 (Dia.) x 14.5 (Height)mm
RS Stock No. 839-1357
Mfr. Part No.T390N16TOFXPSA1
BrandInfineon
$117.12
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381A PCT BG-T4214K0-1 1600V 4900A Stud 150mA 2V 200mA 5 - - 14.5mm 42 (Dia.) x 14.5 (Height)mm
RS Stock No. 145-8674
Mfr. Part No.TZ500N12KOFHPSA1
BrandInfineon
$248.867
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500A PCT BG-PB501-1 1200V 17000A Panel Mount 250mA 2.2V 300mA 5 101mm 50mm 52mm 101 x 50 x 52mm
RS Stock No. 839-1395
Mfr. Part No.T1190N16TOFVTXPSA1
BrandInfineon
$373.17
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1190A PCT BG-T7526K-1 1600V 25500A Stud 250mA 2V 500mA 5 - - 26.5mm 75 (Dia.) x 26.5mm
RS Stock No. 839-1391
Mfr. Part No.T880N16TOFXPSA1
BrandInfineon
$197.61
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880A PCT BG-T5726K-1 1600V 17500A Stud 250mA 2.2V 300mA 5 - - 26.5mm 58 (Dia.) x 26.5mm
RS Stock No. 839-1389
Mfr. Part No.T720N16TOFXPSA1
BrandInfineon
$203.57
Each
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720A PCT BG-T5726K-1 1600V 14500A Stud 250mA 1.5V 300mA 5 - - 26.5mm 58 (Dia.) x 26.5mm