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. 177-5212
Mfr. Part No.2N6508G
BrandLittelfuse
kr 11,958
Each (In a Box of 500)
Units
16A SCR TO-220AB 600V 250A Through Hole 75mA 1.5V 80mA 3 10.28 x 4.82 x 15.75mm - +125 °C -40 °C
RS Stock No. 103-5680
Mfr. Part No.BT152-800R,127
kr 8,72
Each (In a Tube of 50)
Units
13A SCR TO-220AB 800V 220A Through Hole 32mA 1.5V 60mA 3 10.3 x 4.7 x 9.4mm - +125 °C -40 °C
RS Stock No. 436-8114
Mfr. Part No.BT152-800R,127
kr 10,01
Each (In a Pack of 5)
Units
13A SCR TO-220AB 800V 220A Through Hole 32mA 1.5V 60mA 3 10.3 x 4.7 x 9.4mm - +125 °C -40 °C
RS Stock No. 862-4929
Mfr. Part No.2N6508G
BrandLittelfuse
kr 18,165
Each (In a Pack of 10)
Units
16A SCR TO-220AB 600V 250A Through Hole 75mA 1.5V 80mA 3 10.28 x 4.82 x 15.75mm - +125 °C -40 °C
RS Stock No. 165-2391
Mfr. Part No.VS-50RIA120
BrandVishay
kr 171,24
Each (In a Bag of 100)
Units
50A SCR TO-65 1200V 1490A Thread Mount 100mA 2.5V 200mA 2 19.2 x 17.35 x 42.5mm - +125 °C -40 °C
RS Stock No. 862-4916
Mfr. Part No.2N6405G
BrandLittelfuse
kr 10,06
Each (In a Pack of 10)
Units
10A SCR TO-220AB 800V 160A Through Hole 60mA 2.5V 60mA 3 10.28 x 4.82 x 15.75mm - +125 °C -40 °C
RS Stock No. 918-9806
Mfr. Part No.VS-16TTS12S-M3
BrandVishay
kr 14,891
Each (In a Tube of 50)
Units
10A SCR D2PAK (TO-263) 1200V 200A Surface Mount 90mA 3V 150mA 3 10.67 x 9.65 x 4.83mm - +125 °C -40 °C
RS Stock No. 484-2864
Mfr. Part No.BT151-800R,127
kr 6,44
Each (In a Pack of 5)
Units
7.5A SCR TO-220AB 800V 132A Through Hole 15mA 1.5V 20mA 3 10.3 x 4.7 x 9.4mm - +125 °C -40 °C
RS Stock No. 395-3474
Mfr. Part No.VS-50RIA120
BrandVishay
kr 228,51
Each
Units
50A SCR TO-65 1200V 1490A Thread Mount 100mA 2.5V 200mA 2 19.2 x 17.35 x 42.5mm - +125 °C -40 °C
RS Stock No. 878-1772
Mfr. Part No.L6008L6
BrandLittelfuse
kr 11,715
Each (In a Pack of 500)
Units
8A - TO-220 600V 85A Through Hole 5 mA, 10 mA 1.3V 10mA 3 10.67 x 4.78 x 15.75mm - +110 °C -40 °C
RS Stock No. 355-2841
Mfr. Part No.TS820-600T
kr 12,96
Each
Units
5A SCR TO-220AB 600V 73A Through Hole 0.2mA 0.8V 5mA 3 10.4 x 4.6 x 9.15mm - +125 °C -40 °C
RS Stock No. 708-4244
Mfr. Part No.VS-16TTS12S-M3
BrandVishay
kr 17,85
Each
Units
10A SCR D2PAK (TO-263) 1200V 200A Surface Mount 60mA 2V 100mA 3 10.67 x 9.65 x 4.83mm - +125 °C -40 °C
RS Stock No. 197-810
Mfr. Part No.CS45-16IO1
BrandIXYS
kr 48,06
Each
Units
48A SCR TO-247AD 1600V 560A Through Hole 100mA 1.5V 100mA 3 - - +140 °C -40 °C
RS Stock No. 103-8143
Mfr. Part No.BT152-600R,127
kr 8,467
Each (In a Tube of 50)
Units
13A SCR TO-220AB 650V 220A Through Hole 32mA 1.5V 60mA 3 10.3 x 4.7 x 9.4mm - +125 °C -40 °C
RS Stock No. 920-0791
Mfr. Part No.CS45-16IO1
BrandIXYS
kr 38,587
Each (In a Tube of 30)
Units
48A SCR TO-247AD 1600V 560A Through Hole 100mA 1.5V 100mA 3 - - +140 °C -40 °C
RS Stock No. 262-488
Mfr. Part No.BT152-600R,127
kr 9,57
Each
Units
13A SCR TO-220AB 650V 220A Through Hole 32mA 1.5V 60mA 3 10.3 x 4.7 x 9.4mm - +125 °C -40 °C
RS Stock No. 102-4088
Mfr. Part No.TS820-600T
kr 10,465
Each (In a Tube of 50)
Units
5A SCR TO-220AB 600V 73A Through Hole 0.2mA 0.8V 5mA 3 10.4 x 4.6 x 9.15mm - +125 °C -40 °C
RS Stock No. 177-5210
Mfr. Part No.2N6405G
BrandLittelfuse
kr 6,815
Each (In a Box of 500)
Units
10A SCR TO-220AB 800V 160A Through Hole 60mA 2.5V 60mA 3 10.28 x 4.82 x 15.75mm - +125 °C -40 °C
RS Stock No. 165-5512
Mfr. Part No.X0202MA 2BL2
kr 2,509
Each (On a Reel of 2000)
Units
0.8A SCR TO-92 600V 25A Through Hole 200µA 0.8V 5mA 3 4.7 x 3.7 x 4.4mm - +125 °C -40 °C
RS Stock No. 169-5832
Mfr. Part No.16RIA60
BrandVishay
kr 102,908
Each (In a Bag of 100)
Units
16A SCR TO-48 600V 360A Thread Mount 60mA 2V 130mA 2 - - +125 °C -65 °C
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