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 Dimensions Diameter Maximum Operating Temperature Minimum Operating Temperature
RS Stock No. 817-2428
Mfr. Part No.VS-2N5206
BrandVishay
kr 163,31
Each
Units
22A SCR TO-208AA 1000V 340A Thread Mount 80mA 3V 200mA 2 15.5 x 14.3 x 41.7mm 15.5mm +125 °C -40 °C
RS Stock No. 145-9590
Mfr. Part No.X0405MF 1AA2
kr 4,488
Each (In a Bag of 250)
Units
0.9A SCR TO-202 600V 33A Through Hole 0.05mA 0.8V 5mA 3 10.1 x 4.5 x 7.3mm - +125 °C -40 °C
RS Stock No. 395-2724
Mfr. Part No.VS-16RIA100
BrandVishay
kr 155,83
Each
Units
16A SCR TO-48 1000V 360A Thread Mount 60mA 2V 130mA 2 - - +125 °C -65 °C
RS Stock No. 168-6663
Mfr. Part No.X0402NF 1AA2
kr 5,222
Each (In a Bag of 250)
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0.9A SCR TO-202 800V 33A Through Hole 0.2mA 0.8V 5mA 3 10.1 x 4.5 x 7.3mm - +125 °C -40 °C
RS Stock No. 165-2844
Mfr. Part No.VS-181RKI100PBF
BrandVishay
kr 538,92
Each (In a Bag of 12)
Units
180A PCT TO-93 1000V 4000A Thread Mount 150mA 2.5V 600mA 3 35 x 30.33 x 49.5mm - +125 °C -40 °C
RS Stock No. 165-9923
Mfr. Part No.S6X8BSRP
BrandLittelfuse
kr 2,195
Each (On a Reel of 1000)
Units
0.8A SCR SOT-89 600V 10A Surface Mount 200µA 0.8V 5mA 3 4.6 x 2.6 x 1.6mm - +125 °C -40 °C
RS Stock No. 123-1455
Mfr. Part No.FS0103MA
kr 0,683
Each (In a Pack of 100)
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0.8A SCR TO-92 600V 7 A @ 50 Hz, 8 A @ 60 Hz Through Hole 200µA 0.8V 5mA 3 4.8 x 3.86 x 4.8mm - +125 °C -40 °C
RS Stock No. 169-5960
Mfr. Part No.ST330S12P1PBF
BrandVishay
kr 1 413,497
Each (In a Bag of 6)
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330A SCR TO-118 1200V 9420A Stud 200mA 3V 600mA 3 49 x 42.5 x 74.5mm - +125 °C -40 °C
RS Stock No. 817-2459
Mfr. Part No.VS-50RIA100
BrandVishay
kr 181,65
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80A SCR TO-65 1000V 1490A Thread Mount 250mA 3.5V 200mA 2 19.2 x 17.35 x 42.5mm - +125 °C -40 °C
RS Stock No. 509-566
Mfr. Part No.BT151-500R,127
kr 3,928
Each (In a Pack of 10)
Units
7.5A SCR TO-220AB 500V 132A Through Hole 15mA 1.5V 20mA 3 10.3 x 4.7 x 9.4mm - +125 °C -40 °C
RS Stock No. 395-9242
Mfr. Part No.VS-ST110S16P1PBF
BrandVishay
kr 721,53
Each
Units
110A PCT TO-94 1600V 2830A Thread Mount 150mA 3V 600mA 3 - - +125 °C -40 °C
RS Stock No. 878-1788
Mfr. Part No.L6004D5TP
BrandLittelfuse
kr 7,738
Each (In a Pack of 750)
Units
4A - DPAK (TO-252) 600V 40A Surface Mount 5mA 1.3V 10mA 3 6.73 x 6.22 x 2.41mm - +110 °C -40 °C
RS Stock No. 920-0741
Mfr. Part No.CS19-12HO1
BrandIXYS
kr 15,655
Each (In a Tube of 50)
Units
19A SCR TO-220AB 1200V 180A Through Hole 28mA 1.5V 50mA 3 10.66 x 4.83 x 9.15mm - +125 °C -40 °C
RS Stock No. 687-1000
Mfr. Part No.TYN1225RG
kr 25,12
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Units
16A SCR TO-220AB 1200V 260A Through Hole 40mA 1.5V 50mA 3 10.4 x 4.6 x 9.15mm - +125 °C -40 °C
RS Stock No. 170-2399
Mfr. Part No.FS5030QP00TU
kr 14,357
Each (In a Tube of 30)
Units
50A SCR TO-3P 1200V - Through Hole 80mA - - 3+Tab - - - -
RS Stock No. 103-7558
Mfr. Part No.BT151-650R,127
kr 4,911
Each (In a Tube of 50)
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7.5A SCR TO-220AB 650V 132A Through Hole 15mA 1.5V 20mA 3 10.3 x 4.7 x 9.4mm - +125 °C -40 °C
RS Stock No. 165-2442
Mfr. Part No.VS-ST230S12P1VPBF
BrandVishay
kr 873,355
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230A SCR TO-93 1200V 5970A Thread Mount 150mA 3V 600mA 3 35 x 30.33 x 49.5mm - +125 °C -40 °C
RS Stock No. 135-8284
Mfr. Part No.CLA50E1200TC
BrandIXYS
kr 44,03
Each (In a Pack of 2)
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50A SCR TO-268AA (D3PAK) 1200V 700A Surface Mount 80mA 1.6V 100mA 3 16.05 x 14 x 5.1mm - +125 °C -40 °C
RS Stock No. 166-0792
Mfr. Part No.TN1205T-600B-TR
kr 5,589
Each (On a Reel of 2500)
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8A SCR DPAK (TO-252) 600V 120A Surface Mount 5mA 1.3V 15mA 3+Tab 6.6 x 6.2 x 2.4mm - +125 °C -40 °C
RS Stock No. 810-3693
Mfr. Part No.TYN608RG
kr 10,279
Each (In a Pack of 10)
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8A SCR TO-220AB 600V 100A Through Hole 15mA 1.3V 30mA 3 10.4 x 4.6 x 15.9mm - +125 °C -40 °C
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