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 878-1631
製造零件編號S8035KTP
BrandLittelfuse
HK$29.185
/個 (每包:250個)
單位
35A SCR TO-218AC 800V 500A Through Hole - 1.5V 50mA 3 16mm 4.78mm 21.21mm 16 x 4.78 x 21.21mm
RS庫存編號 817-2465
製造零件編號VS-50RIA80
BrandVishay
HK$150.24
單位
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 165-5771
製造零件編號BTW69-1200N
HK$31.40
毎管:30 個
單位
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 395-3474
製造零件編號VS-50RIA120
BrandVishay
HK$161.24
單位
50A SCR TO-65 1200V 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 395-2869
製造零件編號VS-25RIA120M
BrandVishay
HK$122.73
單位
25A SCR TO-48 1200V 440A Thread Mount 60mA 2V 130mA 2 16.51mm - 41.8mm -
RS庫存編號 168-4649
製造零件編號CS30-12IO1
BrandIXYS
HK$31.953
毎管:30 個
單位
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庫存編號 357-3999
製造零件編號VS-30TPS08-M3
BrandVishay
HK$21.54
單位
20A SCR TO-247 800V 300A Through Hole 60mA 2.5V 100mA 3 15.87mm 5.31mm 20.7mm 15.87 x 5.31 x 20.7mm
RS庫存編號 167-320
製造零件編號VS-40TPS12-M3
BrandVishay
HK$62.41
單位
35A SCR TO-247AC 1200V 600A Through Hole 150mA 2.5V 150mA 3 15.87mm 5.31mm 20.7mm 15.87 x 5.31 x 20.7mm
RS庫存編號 300-420
製造零件編號VS-30TPS16PBF
BrandVishay
HK$23.47
單位
20A SCR TO-247AC 1600V 300A Through Hole 45mA 2V 100mA 3 15.87mm 5.31mm 20.7mm 15.87 x 5.31 x 20.7mm
RS庫存編號 919-4404
製造零件編號VS-40TPS12A-M3
BrandVishay
HK$43.948
毎管:25 個
單位
35A SCR TO-247AC 1200V 600A Through Hole 40mA 2.5V 150mA 3 15.87mm 5.31mm 20.7mm 15.87 x 5.31 x 20.7mm
RS庫存編號 165-6237
製造零件編號VS-50RIA80
BrandVishay
HK$149.03
個 (以毎袋:100)
單位
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 395-3496
製造零件編號VS-50RIA40
BrandVishay
HK$127.41
單位
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 839-1357
製造零件編號T390N16TOFXPSA1
BrandInfineon
HK$701.63
單位
381A PCT BG-T4214K0-1 1600V 4900A Stud 150mA 2V 200mA 5 - - 14.5mm 42 (Dia.) x 14.5 (Height)mm
RS庫存編號 920-0798
製造零件編號CS35-12IO4
BrandIXYS
HK$277.102
毎管:10 個
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 169-5836
製造零件編號22RIA80
BrandVishay
HK$46.919
個 (以毎袋:100)
單位
22A SCR TO-48 800V 420A Thread Mount 60mA 2V 130mA 2 16.51mm - 41.8mm -
RS庫存編號 169-5837
製造零件編號22RIA120
BrandVishay
HK$47.83
個 (以毎袋:100)
單位
22A SCR TO-48 1200V 420A Thread Mount 60mA 2V 130mA 2 16.51mm - 41.8mm -
RS庫存編號 145-1945
製造零件編號VS-25RIA120
BrandVishay
HK$58.114
個 (以毎袋:100)
單位
25A SCR TO-48 1200V 440A Thread Mount 60mA 2V 130mA 2 16.51mm - 41.8mm -
RS庫存編號 167-314
製造零件編號VS-40TPS08-M3
BrandVishay
HK$57.21
單位
35A SCR TO-247AC 800V 600A Through Hole 150mA 2.5V 150mA 3 15.87mm 5.31mm 20.7mm 15.87 x 5.31 x 20.7mm
RS庫存編號 817-2428
製造零件編號VS-2N5206
BrandVishay
HK$115.64
單位
22A SCR TO-208AA 1000V 340A Thread Mount 80mA 3V 200mA 2 - 14.3mm 41.7mm 15.5 x 14.3 x 41.7mm
RS庫存編號 829-6858
製造零件編號BTW69-1200N
HK$48.81
單位
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