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 773-4643
製造零件編號TISP4040H1BJR-S
BrandBourns
HK$5.47
/個 (每包:25個)
單位
- - SMBJ - - Surface Mount - - 50mA 2 4.57mm 3.94mm 2.237mm 4.57 x 3.94 x 2.237mm
RS庫存編號 166-1323
製造零件編號BT168GW
HK$1.174
個 (在毎卷:1000)
單位
0.63A SCR SOT-223 (SC-73) 600V 9A Surface Mount 0.2mA 0.8V 5mA 4 6.7mm 3.7mm 1.7mm 6.7 x 3.7 x 1.7mm
RS庫存編號 170-2391
製造零件編號FS0402MH TU
HK$2.938
毎管:50 個
單位
4A SCR TO-220AB 600V 30 A @ 50 Hz, 33 A @ 60 Hz Through Hole 200µA 0.8V 5mA 3 10.36mm 4.67mm 15.35mm 10.36 x 4.67 x 15.35mm
RS庫存編號 878-1772
製造零件編號L6008L6
BrandLittelfuse
HK$10.245
/個 (每包:500個)
單位
8A - TO-220 600V 85A Through Hole 5 mA, 10 mA 1.3V 10mA 3 10.67mm 4.78mm 15.75mm 10.67 x 4.78 x 15.75mm
RS庫存編號 169-5961
製造零件編號ST330S16P1PBF
BrandVishay
HK$1,319.57
個 (以毎袋:6)
單位
330A SCR TO-118 1600V 9420A Stud 200mA 3V 600mA 3 49mm 42.5mm 74.5mm 49 x 42.5 x 74.5mm
RS庫存編號 168-4648
製造零件編號DCR1010G14
BrandDynex
HK$1,039.031
個 (以毎盒:7)
單位
1010A SCR Type G 1400V 15000A Stud 300mA 3V 200mA 3 - - 26.5mm 58 (Dia.) x 26.5mm
RS庫存編號 125-8032
製造零件編號CS60-16io1
BrandIXYS
HK$77.25
單位
60A SCR PLUS247 1600V 1.51kA Through Hole 200mA 1.6V 200mA 3 16.13mm 5.21mm 21.34mm 16.13 x 5.21 x 21.34mm
RS庫存編號 177-5203
製造零件編號C106DG
BrandLittelfuse
HK$2.588
個 (以毎盒:500)
單位
2.55A SCR TO-225AA 400V 20A Through Hole 500µA 1V 6mA 3 7.74mm 2.66mm 11.04mm 7.74 x 2.66 x 11.04mm
RS庫存編號 163-9798
製造零件編號TN4015H-6T
HK$11.60
/個 (每包:5個)
單位
25A SCR TO-220AB 600V 394A Through Hole 15mA 1.3V 60mA 3 10.4mm 4.6mm 15.9mm 10.4 x 4.6 x 15.9mm
RS庫存編號 714-2647
製造零件編號P0102DA 1AA3
HK$2.50
/個 (每包:20個)
單位
0.5A SCR TO-92 400V 8A Through Hole 0.2mA 0.8V 5mA 3 4.7mm 3.7mm 4.4mm 4.7 x 3.7 x 4.4mm
RS庫存編號 687-1022
製造零件編號X0405MF 1AA2
HK$5.154
/個 (每包:10個)
單位
0.9A SCR TO-202 600V 33A Through Hole 0.05mA 0.8V 5mA 3 10.1mm 4.5mm 7.3mm 10.1 x 4.5 x 7.3mm
RS庫存編號 300-414
製造零件編號VS-30TPS12-M3
BrandVishay
HK$42.77
單位
20A SCR TO-247AC 1200V 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 163-9779
製造零件編號TN4015H-6G-TR
HK$10.80
/個 (每包:5個)
單位
25A SCR D2PAK 600V 394A Surface Mount 15mA 1.3V 60mA 2 + Tab 10.28mm 9.35mm 4.6mm 10.28 x 9.35 x 4.6mm
RS庫存編號 170-2392
製造零件編號FS0404MH TU
HK$2.938
毎管:50 個
單位
4A SCR TO-220AB 600V 30 A @ 50 Hz, 33 A @ 60 Hz Through Hole 50µA 0.8V 5mA 3 10.36mm 4.67mm 15.35mm 10.36 x 4.67 x 15.35mm
RS庫存編號 878-1861
製造零件編號S6010DS2TP
BrandLittelfuse
HK$7.502
/個 (每包:750個)
單位
10A SCR DPAK (TO-252) 600V 100A Surface Mount 200µA 0.8V 6mA 3 6.73mm 6.22mm 2.41mm 6.73 x 6.22 x 2.41mm
RS庫存編號 171-9588
製造零件編號S6020LTP
BrandLittelfuse
HK$17.64
/個 (每包:5個)
單位
20 SCR TO-220AB - 300A Through Hole 30mA 1.5V 40mA 3 10.67mm 4.78mm 15.75mm 10.67 x 4.78 x 15.75mm
RS庫存編號 168-6666
製造零件編號TYN640RG
HK$14.894
毎管:50 個
單位
25A SCR TO-220AB 600V 480A Through Hole 35mA 1.3V 75mA 3 10.4mm 4.6mm 9.15mm 10.4 x 4.6 x 9.15mm
RS庫存編號 171-9596
製造零件編號S6025LTP
BrandLittelfuse
HK$21.65
/個 (每包:5個)
單位
25 SCR TO-220AB - 300A Through Hole 35mA 1.5V 50mA 3 10.67mm 4.78mm 15.75mm 10.67 x 4.78 x 15.75mm
RS庫存編號 123-1457
製造零件編號FS0402MH TU
HK$4.39
/個 (每包:20個)
單位
4A SCR TO-220AB 600V 30 A @ 50 Hz, 33 A @ 60 Hz Through Hole 200µA 0.8V 5mA 3 10.36mm 4.67mm 15.35mm 10.36 x 4.67 x 15.35mm
RS庫存編號 876-5755
製造零件編號TS110-8UF
HK$3.823
/個 (每包:20個)
單位
0.8A SCR SMB 800V 21A Surface Mount 100µA 0.8V 12mA 3 4.6mm 3.95mm 1.1mm 4.6 x 3.95 x 1.1mm