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. 194-372
Mfr. Part No.CS23-12IO2
BrandIXYS
HK$230.66
Each
units
32A SCR TO-208AA 1200V 480A Thread Mount 50mA 2.5V 100mA 3 15.7mm 14mm 39.5mm 15.7 x 14 x 39.5mm
RS Stock No. 920-0751
Mfr. Part No.CS23-12IO2
BrandIXYS
HK$196.451
Each (In a Tube of 10)
units
32A SCR TO-208AA 1200V 480A Thread Mount 50mA 2.5V 100mA 3 15.7mm 14mm 39.5mm 15.7 x 14 x 39.5mm
RS Stock No. 197-804
BrandIXYS
HK$313.25
Each
units
69A SCR TO-208AC 1200V 1340A Thread Mount 100mA 1.5V 80mA 2 19.62mm 17mm 41.3mm 19.62 x 17 x 41.3mm
RS Stock No. 168-4649
Mfr. Part No.CS30-12IO1
BrandIXYS
HK$31.953
Each (In a Tube of 30)
units
31A SCR TO-247AD 1200V 320A Through Hole 80mA 1.2V 100mA 3 16.26mm 5.3mm 21.46mm 16.26 x 5.3 x 21.46mm
RS Stock No. 920-0798
Mfr. Part No.CS35-12IO4
BrandIXYS
HK$277.102
Each (In a Tube of 10)
units
69A SCR TO-208AC 1200V 1340A Thread Mount 100mA 1.5V 80mA 2 19.62mm 17mm 41.3mm 19.62 x 17 x 41.3mm
RS Stock No. 920-0795
Mfr. Part No.CS30-16IO1
BrandIXYS
HK$35.263
Each (In a Tube of 30)
units
31A SCR TO-247AD 1600V 320A Through Hole 65mA 1V 100mA 3 16.26mm - 21.46mm -
RS Stock No. 197-826
Mfr. Part No.CS30-16IO1
BrandIXYS
HK$52.97
Each
units
31A SCR TO-247AD 1600V 320A Through Hole 65mA 1V 100mA 3 16.26mm - 21.46mm -
RS Stock No. 761-3990
Mfr. Part No.CS30-12io1
BrandIXYS
HK$35.48
Each
units
31A SCR TO-247AD 1200V 320A Through Hole 80mA 1.2V 100mA 3 16.26mm 5.3mm 21.46mm 16.26 x 5.3 x 21.46mm
RS Stock No. 146-1768
Mfr. Part No.N0465WN140
BrandIXYS
HK$496.288
Each (In a Box of 24)
units
465A PCT - 1400 → 1600V 5000A Screw Mount 250mA 2.5V 250mA - - - 14mm 42 (Dia.) x 14mm
RS Stock No. 920-0883
Mfr. Part No.CS45-16IO1R
BrandIXYS
HK$41.27
Each (In a Tube of 30)
units
48A SCR ISOPLUS247 1600V 560A Through Hole 200mA 1.6V 100mA 3 16.13mm 5.21mm 21.34mm 16.13 x 5.21 x 21.34mm
RS Stock No. 761-3993
Mfr. Part No.CS30-14io1
BrandIXYS
HK$37.29
Each
units
31A SCR TO-247AD 1400V 320A Through Hole 80mA 1.2V 100mA 3 16.26mm 5.3mm 21.46mm 16.26 x 5.3 x 21.46mm
RS Stock No. 194-366
Mfr. Part No.CS20-16IO1
BrandIXYS
HK$37.04
Each
units
19A SCR TO-247AD 1600V 215A Through Hole 65mA 1V 100mA 3 16.26mm - 21.46mm -
RS Stock No. 194-827
Mfr. Part No.N0992YS020
BrandIXYS
HK$1,115.21
Each
units
992A SCR - 200V 12100A Stud 150mA 3V 500mA 3 - - 15.1mm 42 (Dia.) x 15.1mm
RS Stock No. 168-4566
Mfr. Part No.CS60-16IO1
BrandIXYS
HK$87.761
Each (In a Tube of 30)
units
60A SCR PLUS247 1600V 1.51kA Through Hole 200mA 1.6V 200mA 3 16.13mm 5.21mm 21.34mm 16.13 x 5.21 x 21.34mm
RS Stock No. 125-8053
Mfr. Part No.MCO150-16io1
BrandIXYS
HK$206.40
Each
units
158A - SOT-227B 1600V 2.16kA Screw 200mA 1.6V 200mA 4 38.23mm 25.25mm 12.22mm 38.23 x 25.25 x 12.22mm
RS Stock No. 135-8282
Mfr. Part No.CLA50E1200HB
BrandIXYS
HK$39.35
Each (In a Pack of 2)
units
50A SCR TO-247 1200V 700A Through Hole 80mA 1.6V 100mA 3 16.24mm 5.3mm 21.45mm 16.24 x 5.3 x 21.45mm
RS Stock No. 135-8218
Mfr. Part No.CLA80E1200HF
BrandIXYS
HK$38.548
Each (In a Tube of 30)
units
80A SCR PLUS247 1200V 970A Through Hole 80mA 1.6V 100mA 3 16.13mm 5.21mm 21.34mm 16.13 x 5.21 x 21.34mm
RS Stock No. 146-1723
Mfr. Part No.R0830LC14D
BrandIXYS
HK$3,122.027
Each (In a Box of 6)
units
830A SCR R0830 1400V 8500A Stud 300mA 3V 1000mA 2 - - 27mm 58.5 (Dia.) x 27mm
RS Stock No. 168-4651
Mfr. Part No.CS45-08IO1
BrandIXYS
HK$33.406
Each (In a Tube of 30)
units
48A SCR TO-247AD 800V 560A Through Hole 200mA 1.6V 100mA 3 16.24mm 5.3mm 21.45mm 16.24 x 5.3 x 21.45mm
RS Stock No. 825-2628
Mfr. Part No.N0465WN140
BrandIXYS
HK$467.99
Each
units
465A PCT - 1400 → 1600V 5000A Screw Mount 250mA 2.5V 250mA - - - 14mm 42 (Dia.) x 14mm