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 165-2845
製造零件編號VS-181RKI40PBF
BrandVishay
HK$427.419
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180A PCT TO-93 400V 4000A Thread Mount 150mA 2.5V 600mA 3 35mm 30.33mm 49.5mm 35 x 30.33 x 49.5mm
RS庫存編號 110-6563
製造零件編號TN1205T-600B-TR
HK$5.726
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8A SCR DPAK (TO-252) 600V 120A Surface Mount 5mA 1.3V 15mA 3+Tab 6.6mm 6.2mm 2.4mm 6.6 x 6.2 x 2.4mm
RS庫存編號 165-2440
製造零件編號VS-ST180S12P1VPBF
BrandVishay
HK$582.75
個 (以毎袋:12)
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200A SCR TO-93 1200V 5230A Thread Mount 150mA 3V 600mA 3 35mm 30.33mm 49.5mm 35 x 30.33 x 49.5mm
RS庫存編號 166-1424
製造零件編號BT169D
HK$0.61
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0.5A SCR SPT 400V 9A Through Hole 0.2mA 0.8V 5mA 3 4.8mm 4.2mm 5.2mm 4.8 x 4.2 x 5.2mm
RS庫存編號 123-1464
製造零件編號FS2510MH TU
HK$5.62
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25A SCR TO-220AB 600V 300 A @ 50 Hz, 330 A @ 60 Hz Through Hole 25mA 1.3V 40mA 3 10.36mm 4.67mm 15.35mm 10.36 x 4.67 x 15.35mm
RS庫存編號 760-9288
製造零件編號DCR370T18
BrandDynex
HK$544.25
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370A SCR Type G 1800V 5000A Stud 300mA 3V 200mA 3 - - 13.5mm 42 (Dia.) x 13.5mm
RS庫存編號 287-9684
製造零件編號VS-16TTS12-M3
BrandVishay
HK$28.73
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10A SCR TO-220AC 1200V 200A Through Hole 60mA 2V 100mA 3 10.54mm 4.57mm 8.76mm 10.54 x 4.57 x 8.76mm
全新
RS庫存編號 188-8494
製造零件編號TN1215-800G-TR
HK$15.546
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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
RS庫存編號 792-0712
製造零件編號BT152-500RT
HK$5.943
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13A SCR TO-220AB 500V 220A Through Hole 32mA 1.5V 60mA 3 10.3mm 4.7mm 16 (With Tab)mm 10.3 x 4.7 x 16mm
RS庫存編號 165-2846
製造零件編號VS-ST230S08P0VPBF
BrandVishay
HK$659.913
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230A SCR TO-93 800V 5970A Thread Mount 150mA 3V 600mA 3 35mm 30.33mm 49.5mm 35 x 30.33 x 49.5mm
RS庫存編號 168-6278
製造零件編號P0111MN 5AA4
HK$2.156
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0.5A SCR SOT-223 600V 8A Surface Mount 0.025mA 0.8V 5mA 3+Tab 6.5mm 3.5mm 1.8mm 6.5 x 3.5 x 1.8mm
RS庫存編號 687-0962
製造零件編號X0202MN 5BA4
HK$5.798
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0.8A SCR SOT-223 600V 25A Surface Mount 0.2mA 0.8V 5mA 3+Tab 6.5mm 3.5mm 1.8mm 6.5 x 3.5 x 1.8mm
RS庫存編號 165-2611
製造零件編號VS-ST230C16C0
BrandVishay
HK$335.833
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410A PCT TO-200AB 1600V 5970A Screw Mount 150mA 3V 600mA 3 42mm 42mm 14.4mm 42 x 42 x 14.4mm
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12A SCR DPAK - 115A Surface Mount 200µA - 5mA 3 6.73mm 6.22mm 2.17mm 6.73 x 6.22 x 2.17mm
RS庫存編號 168-6666
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HK$14.894
毎管:50 個
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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
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製造零件編號C106M1G
BrandLittelfuse
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RS庫存編號 169-5841
製造零件編號ST180C16C0
BrandVishay
HK$394.83
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350A PCT TO-200AB 1600V 5230A Screw Mount 150mA 3V 600mA 3 42mm 42mm 14.4mm 42 x 42 x 14.4mm
RS庫存編號 168-6662
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HK$20.91
毎管:50 個
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16A SCR TO-220AB 1200V 260A Through Hole 40mA 1.5V 50mA 3 10.4mm 4.6mm 9.15mm 10.4 x 4.6 x 9.15mm
RS庫存編號 700-5554
製造零件編號VS-110RKI120PBF
BrandVishay
HK$360.27
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110A PCT TO-94 1200V 2180A Thread Mount 120mA 2V 200mA 3 29.5mm 27mm 188mm 29.5 x 27 x 188mm