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$191.10
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$176.277
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. 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. 920-0798
Mfr. Part No.CS35-12IO4
BrandIXYS
HK$251.92
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. 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. 197-804
BrandIXYS
HK$275.25
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. 197-826
Mfr. Part No.CS30-16IO1
BrandIXYS
HK$41.77
Each
units
31A SCR TO-247AD 1600V 320A Through Hole 65mA 1V 100mA 3 16.26mm - 21.46mm -
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. 135-8211
Mfr. Part No.CLA30E1200HB
BrandIXYS
HK$23.327
Each (In a Tube of 30)
units
30A SCR TO-247 1200V 325A Through Hole 50mA 1.6V 60mA 3 16.24mm 5.3mm 21.45mm 16.24 x 5.3 x 21.45mm
RS Stock No. 135-8212
Mfr. Part No.CLA30E1200PB
BrandIXYS
HK$17.474
Each (In a Tube of 50)
units
30A SCR TO-220 1200V 325A Through Hole 50mA 1.6V 60mA 3+Tab 10.66mm 4.82mm 16mm 10.66 x 4.82 x 16mm
RS Stock No. 168-4784
Mfr. Part No.N0795YN180
BrandIXYS
HK$1,045.272
Each (In a Box of 24)
units
795A PCT - 1000 → 1800V 10500A Screw Mount 150mA 2.50V 300mA - - - 14mm 42 (Dia.) x 14mm
RS Stock No. 168-4590
Mfr. Part No.MCO150-16IO1
BrandIXYS
HK$165.225
Each (In a Tube of 10)
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. 768-9017
Mfr. Part No.N0910LC200-U9900
BrandIXYS
HK$1,613.76
Each
units
910A PCT N0910 2000V 9200A Stud 300mA 3V 1000mA 2 - - 27mm 58.5 (Dia.) x 27mm
RS Stock No. 135-8213
Mfr. Part No.CLA40P1200FC
BrandIXYS
HK$61.682
Each (In a Tube of 25)
units
40A SCR I4-Pac 1200V 700A Through Hole 80mA 1.6V 100mA 5 20.29mm 5.21mm 21.34mm 20.29 x 5.21 x 21.34mm
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. 768-9026
Mfr. Part No.N1718NC180
BrandIXYS
HK$2,081.39
Each
units
1718A PCT N1718 2000V 27200A Stud 300mA 3V 1000mA 2 - - 27.7mm 74 (Dia.) x 27.7mm
RS Stock No. 193-802
Mfr. Part No.CS19-12HO1
BrandIXYS
HK$15.22
Each (In a Pack of 5)
units
19A SCR TO-220AB 1200V 180A Through Hole 28mA 1.5V 50mA 3 10.66mm 4.83mm 9.15mm 10.66 x 4.83 x 9.15mm
RS Stock No. 135-8214
Mfr. Part No.CLA50E1200HB
BrandIXYS
HK$29.704
Each (In a Tube of 30)
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. 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. 135-8280
Mfr. Part No.CLA40P1200FC
BrandIXYS
HK$81.29
Each
units
40A SCR I4-Pac 1200V 700A Through Hole 80mA 1.6V 100mA 5 20.29mm 5.21mm 21.34mm 20.29 x 5.21 x 21.34mm