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 168-9404
製造零件編號BT151-500R,127
HK$3.785
毎管:50 個
單位
7.5A SCR TO-220AB 500V 132A Through Hole 15mA 1.5V 20mA 3 10.3mm 4.7mm 9.4mm 10.3 x 4.7 x 9.4mm
RS庫存編號 509-566
製造零件編號BT151-500R,127
HK$3.632
/個 (每包:10個)
單位
7.5A SCR TO-220AB 500V 132A Through Hole 15mA 1.5V 20mA 3 10.3mm 4.7mm 9.4mm 10.3 x 4.7 x 9.4mm
RS庫存編號 862-4929
製造零件編號2N6508G
BrandLittelfuse
HK$14.793
/個 (每包:10個)
單位
16A SCR TO-220AB 600V 250A Through Hole 75mA 1.5V 80mA 3 10.28mm 4.82mm 15.75mm 10.28 x 4.82 x 15.75mm
RS庫存編號 395-2831
製造零件編號VS-22RIA40
BrandVishay
HK$99.92
單位
22A SCR TO-48 400V 420A Thread Mount 60mA 2V 130mA 2 16.51mm - 41.8mm -
RS庫存編號 169-5899
製造零件編號22RIA40
BrandVishay
HK$46.919
個 (以毎袋:100)
單位
22A SCR TO-48 400V 420A Thread Mount 60mA 2V 130mA 2 16.51mm - 41.8mm -
RS庫存編號 177-5212
製造零件編號2N6508G
BrandLittelfuse
HK$10.116
個 (以毎盒:500)
單位
16A SCR TO-220AB 600V 250A Through Hole 75mA 1.5V 80mA 3 10.28mm 4.82mm 15.75mm 10.28 x 4.82 x 15.75mm
RS庫存編號 121-6890
製造零件編號CR25RM-12D#B00
HK$40.875
/個 (每包:2個)
單位
25A SCR TO-3PFM 600V 360A Through Hole 30mA 1.5V 15mA 3 15.6mm 5.5mm 19.9mm 15.6 x 5.5 x 19.9mm
RS庫存編號 544-9999
製造零件編號2N6507G
BrandLittelfuse
HK$17.02
單位
16A SCR TO-220AB 400V 250A Through Hole 30mA 1.5V 40mA 3 10.28mm 4.82mm 9.28mm 10.28 x 4.82 x 9.28mm
RS庫存編號 357-3438
製造零件編號VS-ST083S08PFM1P
BrandVishay
HK$735.04
單位
85A SCR TO-94 800V 2560A Thread Mount 200mA 3V 600mA 3 - - 191mm 29.5 (Dia.) x 191mm
RS庫存編號 878-1653
製造零件編號Q4016LH6
BrandLittelfuse
HK$9.842
/個 (每包:500個)
單位
16A TRIAC TO-220 400V 200A Through Hole 80mA 1.3V 70mA 3 10.67mm 4.78mm 15.75mm 10.67 x 4.78 x 15.75mm
RS庫存編號 165-2437
製造零件編號VS-ST083S08PFM1P
BrandVishay
HK$788.56
個 (以毎袋:25)
單位
85A SCR TO-94 800V 2560A Thread Mount 200mA 3V 600mA 3 - - 191mm 29.5 (Dia.) x 191mm
RS庫存編號 103-2939
製造零件編號2N6507G
BrandLittelfuse
HK$10.298
個 (以毎盒:500)
單位
16A SCR TO-220AB 400V 250A Through Hole 30mA 1.5V 40mA 3 10.28mm 4.82mm 9.28mm 10.28 x 4.82 x 9.28mm
RS庫存編號 920-0751
製造零件編號CS23-12IO2
BrandIXYS
HK$196.451
毎管:10 個
單位
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庫存編號 194-372
製造零件編號CS23-12IO2
BrandIXYS
HK$230.66
單位
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庫存編號 395-2825
製造零件編號VS-22RIA100
BrandVishay
HK$120.76
單位
22A SCR TO-48 1000V 420A Thread Mount 60mA 2V 130mA 2 16.51mm - 41.8mm -
RS庫存編號 169-5898
製造零件編號22RIA100
BrandVishay
HK$46.919
個 (以毎袋:100)
單位
22A SCR TO-48 1000V 420A Thread Mount 60mA 2V 130mA 2 16.51mm - 41.8mm -
RS庫存編號 714-2640
製造零件編號BTW69-1200RG
HK$66.26
單位
32A SCR TOP3 1200V 610A Through Hole 80mA 1.3V 150mA 3 15.5mm 4.6mm 12.85mm 15.5 x 4.6 x 12.85mm
RS庫存編號 714-2669
製造零件編號TYN1012RG
HK$14.962
/個 (每包:5個)
單位
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 227-9084
製造零件編號VS-22RIA80
BrandVishay
HK$111.25
單位
22A SCR TO-48 800V 420A Thread Mount 60mA 2V 130mA 2 16.51mm - 41.8mm -
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