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. 168-4566
Mfr. Part No.CS60-16IO1
BrandIXYS
MYR49.791
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. 920-0795
Mfr. Part No.CS30-16IO1
BrandIXYS
MYR17.241
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. 125-8032
Mfr. Part No.CS60-16io1
BrandIXYS
MYR41.68
Each
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. 197-826
Mfr. Part No.CS30-16IO1
BrandIXYS
MYR35.14
Each
units
31A SCR TO-247AD 1600V 320A Through Hole 65mA 1V 100mA 3 16.26mm - 21.46mm -
RS Stock No. 197-804
BrandIXYS
MYR149.02
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. 168-4784
Mfr. Part No.N0795YN180
BrandIXYS
MYR593.043
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. 920-0798
Mfr. Part No.CS35-12IO4
BrandIXYS
MYR174.859
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. 825-2631
Mfr. Part No.N0795YN180
BrandIXYS
MYR471.16
Each
units
795A PCT - 1000 → 1800V 10500A Screw Mount 150mA 2.50V 300mA - - - 14mm 42 (Dia.) x 14mm
RS Stock No. 761-3993
Mfr. Part No.CS30-14io1
BrandIXYS
MYR18.51
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. 920-0791
Mfr. Part No.CS45-16IO1
BrandIXYS
MYR16.092
Each (In a Tube of 30)
units
48A SCR TO-247AD 1600V 560A Through Hole 100mA 1.5V 100mA 3 16.26mm - 21.46mm -
RS Stock No. 920-0741
Mfr. Part No.CS19-12HO1
BrandIXYS
MYR8.576
Each (In a Tube of 50)
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. 761-3990
Mfr. Part No.CS30-12io1
BrandIXYS
MYR22.76
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. 135-8280
Mfr. Part No.CLA40P1200FC
BrandIXYS
MYR47.29
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
RS Stock No. 135-8212
Mfr. Part No.CLA30E1200PB
BrandIXYS
MYR10.587
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. 920-0751
Mfr. Part No.CS23-12IO2
BrandIXYS
MYR116.889
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. 135-8218
Mfr. Part No.CLA80E1200HF
BrandIXYS
MYR19.739
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. 135-8291
Mfr. Part No.CLA80E1200HF
BrandIXYS
MYR36.32
Each
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. 146-1768
Mfr. Part No.N0465WN140
BrandIXYS
MYR281.57
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. 168-4651
Mfr. Part No.CS45-08IO1
BrandIXYS
MYR18.953
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. 135-8278
Mfr. Part No.CLA30E1200PB
BrandIXYS
MYR12.54
Each (In a Pack of 5)
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