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 700-5639
製造零件編號VS-ST380CH06C1
BrandVishay
TWD3,297.00
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960A PCT TO-200AB 600V 13000A Screw Mount 200mA 3V 600mA 3 42mm 42mm 15.1mm 42 x 42 x 15.1mm
RS庫存編號 165-2655
製造零件編號VS-ST380CH06C1
BrandVishay
TWD3,629.10
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960A PCT TO-200AB 600V 13000A Screw Mount 200mA 3V 600mA 3 42mm 42mm 15.1mm 42 x 42 x 15.1mm
RS庫存編號 839-1379
製造零件編號T560N12TOFXPSA1
BrandInfineon
TWD2,717.00
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559A PCT BG-T4814K0-1 1200V 7100A Stud 200mA 2V 300mA 5 - - 14.5mm 48 (Dia.) x 14.5 (Height)mm
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製造零件編號VS-ST330S12P1PBF
BrandVishay
TWD3,547.00
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330A SCR TO-118 1200V 9420A Stud 200mA 3V 600mA 3 49mm 42.5mm 74.5mm 49 x 42.5 x 74.5mm
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製造零件編號VS-80RIA80PBF
BrandVishay
TWD1,264.00
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RS庫存編號 905-6178
製造零件編號SKT 1200/16 E
BrandSemikron
TWD9,657.00
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BrandVishay
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BrandVishay
TWD4,449.70
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330A SCR TO-118 1200V 9420A Stud 200mA 3V 600mA 3 49mm 42.5mm 74.5mm 49 x 42.5 x 74.5mm
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TWD4.50
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BrandVishay
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RS庫存編號 817-2459
製造零件編號VS-50RIA100
BrandVishay
TWD584.00
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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
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製造零件編號VS-ST700C18L1
BrandVishay
TWD4,453.00
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910A PCT TO-200AC 1800V 16400A Screw Mount 200mA 3V 600mA 2 58.5mm 58.5mm 27mm 58.5 x 58.5 x 27mm
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TWD29.40
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