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庫存編號 103-1577
製造零件編號TYN1012RG
HK$15.135
毎管:50 個
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8A SCR TO-220AB 1000V 145A Through Hole 15mA 1.3V 30mA 3 10.4mm 4.6mm 9.15mm 10.4 x 4.6 x 9.15mm
RS庫存編號 227-9107
製造零件編號VS-50RIA60
BrandVishay
HK$126.53
單位
50A SCR TO-65 600V 1490A Thread Mount 100mA 2.5V 200mA 2 19.2mm 17.35mm 42.5mm 19.2 x 17.35 x 42.5mm
RS庫存編號 169-5881
製造零件編號30TPS08PBF
BrandVishay
HK$14.923
毎管:25 個
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RS庫存編號 227-9084
製造零件編號VS-22RIA80
BrandVishay
HK$111.25
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22A SCR TO-48 800V 420A Thread Mount 60mA 2V 130mA 2 16.51mm - 41.8mm -
RS庫存編號 165-5771
製造零件編號BTW69-1200N
HK$31.40
毎管:30 個
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31A SCR TOP3 1200V 763A Through Hole 50mA 1.3V 100mA 3 15.5mm 4.6mm 21.1mm 15.5 x 4.6 x 21.1mm
RS庫存編號 817-2465
製造零件編號VS-50RIA80
BrandVishay
HK$150.24
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80A SCR TO-65 800V 1490A Thread Mount 250mA 3.5V 200mA 2 19.2mm 17.35mm 42.5mm 19.2 x 17.35 x 42.5mm
RS庫存編號 920-0798
製造零件編號CS35-12IO4
BrandIXYS
HK$251.92
毎管:10 個
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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
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製造零件編號22RIA120
BrandVishay
HK$47.83
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22A SCR TO-48 1200V 420A Thread Mount 60mA 2V 130mA 2 16.51mm - 41.8mm -
RS庫存編號 197-826
製造零件編號CS30-16IO1
BrandIXYS
HK$41.77
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31A SCR TO-247AD 1600V 320A Through Hole 65mA 1V 100mA 3 16.26mm - 21.46mm -
RS庫存編號 817-2459
製造零件編號VS-50RIA100
BrandVishay
HK$142.50
單位
80A SCR TO-65 1000V 1490A Thread Mount 250mA 3.5V 200mA 2 19.2mm 17.35mm 42.5mm 19.2 x 17.35 x 42.5mm
RS庫存編號 197-804
BrandIXYS
HK$275.25
單位
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庫存編號 227-9090
製造零件編號VS-22RIA120
BrandVishay
HK$139.49
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22A SCR TO-48 1200V 420A Thread Mount 60mA 2V 130mA 2 16.51mm - 41.8mm -
RS庫存編號 169-5920
製造零件編號50RIA40
BrandVishay
HK$74.031
個 (以毎袋:100)
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50A SCR TO-65 400V 1490A Thread Mount 100mA 2.5V 200mA 2 19.2mm 17.35mm 42.5mm 19.2 x 17.35 x 42.5mm
RS庫存編號 169-5836
製造零件編號22RIA80
BrandVishay
HK$46.919
個 (以毎袋:100)
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22A SCR TO-48 800V 420A Thread Mount 60mA 2V 130mA 2 16.51mm - 41.8mm -
RS庫存編號 807-9953
製造零件編號MCR716T4G
BrandLittelfuse
HK$4.414
/個 (每包:50個)
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2.6A SCR DPAK (TO-252) 400V 25A Surface Mount 300µA 1V 10mA 3 6.73mm 6.22mm 2.38mm 6.73 x 6.22 x 2.38mm
RS庫存編號 768-9017
製造零件編號N0910LC200-U9900
BrandIXYS
HK$1,613.76
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910A PCT N0910 2000V 9200A Stud 300mA 3V 1000mA 2 - - 27mm 58.5 (Dia.) x 27mm
RS庫存編號 163-9738
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RS庫存編號 188-8494
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/個 (每包:5個)
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12A SCR D2PAK - 145A Surface Mount 15mA - 30mA 3 10.28mm 9.35mm 4.37mm 10.28 x 9.35 x 4.37mm
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BrandLittelfuse
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65A SCR TO-218AC 600V 950A Through Hole 50mA 2V 80mA 3 16mm 4.78mm 21.21mm 16 x 4.78 x 21.21mm
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製造零件編號16RIA100
BrandVishay
HK$46.007
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16A SCR TO-48 1000V 360A Thread Mount 60mA 2V 130mA 2 16.51mm - 41.8mm -