Thyristors

Thyristors are four-layer semiconductor devices, 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.

How do thyristors work?

Thyristors usually consist 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 Thyristors are 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 thyristors

  • Silicon controlled rectifier (SCR) - The basic purpose of an 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 an 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., Firing circuit commander modules are required for this.
  • 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 its OFF.
  • Diac - Diac is a mix of the words diode and ac switch it is similar to a four-layer diode but it can conduct in both directions meaning it can contact both AC and DC currents.

Applications of thyristors

Thyristors are commonly found in many everyday applications such as:

  • Motor speed controls
  • Pressure control systems
  • Light dimmers
  • Liquid level regulators

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รายละเอียดสินค้า / Description ราคา / Price Rated Average On-State Current Thyristor Type Package Type Repetitive Peak Reverse Voltage Current Rating Surge Current Rating Mounting Type Power Rating Maximum Gate Trigger Current Output Isolation Input Voltage AC Maximum Gate Trigger Voltage Input Voltage DC Maximum Holding Current
RS Stock No. 194-265
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCC312-16IO1
Brand :IXYS
THB5,054.38
Each
Units
320A SCR Module Y1 CU 1600V - 10.1kA Panel Mount - 150mA - - 2V - 150mA
RS Stock No. 168-4489
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCC312-16IO1
Brand :IXYS
THB5,033.94
Each (In a Box of 3)
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320A SCR Module Y1 CU 1600V - 10.1kA Panel Mount - 150mA - - 2V - 150mA
RS Stock No. 165-2611
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.VS-ST230C16C0
Brand :Vishay
THB2,309.758
Each (In a Box of 12)
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410A PCT TO-200AB 1600V - 5970A Screw Mount - 150mA - - 3V - 600mA
RS Stock No. 227-9214
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.VS-ST230C16C0
Brand :Vishay
THB2,336.42
Each
Units
410A PCT TO-200AB 1600V - 5970A Screw Mount - 150mA - - 3V - 600mA
RS Stock No. 193-717
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCC95-16IO1B
Brand :IXYS
THB1,201.65
Each
Units
116A SCR Module TO-240AA 1600V - 2.4kA Panel Mount - 150mA - - 2.5V - 200mA
RS Stock No. 177-5352
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCC95-16IO1B
Brand :IXYS
THB991.421
Each (In a Box of 36)
Units
116A SCR Module TO-240AA 1600V - 2.4kA Panel Mount - 150mA - - 2.5V - 200mA
RS Stock No. 862-4929
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.2N6508G
Brand :Littelfuse
THB59.095
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16A SCR TO-220AB 600V - 250A Through Hole - 75mA - - 1.5V - 80mA
RS Stock No. 262-488
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BT152-600R,127
THB40.91
Each
Units
13A SCR TO-220AB 650V - 220A Through Hole - 32mA - - 1.5V - 60mA
RS Stock No. 177-5212
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.2N6508G
Brand :Littelfuse
THB58.725
Each (In a Box of 500)
Units
16A SCR TO-220AB 600V - 250A Through Hole - 75mA - - 1.5V - 80mA
RS Stock No. 103-8143
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BT152-600R,127
THB32.004
Each (In a Tube of 50)
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13A SCR TO-220AB 650V - 220A Through Hole - 32mA - - 1.5V - 60mA
RS Stock No. 195-4649
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SKKT 162/16 E
Brand :Semikron
THB1,746.32
Each
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156A SCR Module SEMIPACK2 1600V - 5.4kA Panel Mount - 150mA - - 2V - 400mA
RS Stock No. 905-6239
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SKKT 570/16 E
Brand :Semikron
THB15,484.40
Each
Units
570A SCR A 46 1600V - 1500A Panel Mount - 150mA - - 3V - 250mA
RS Stock No. 668-7029
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCC95-12io1B
Brand :IXYS
THB1,091.17
Each
Units
116A SCR Module TO-240AA 1200V - 2.4kA Panel Mount - 150mA - - 2.5V - 200mA
RS Stock No. 177-5361
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCC95-12IO1B
Brand :IXYS
THB959.433
Each (In a Box of 36)
Units
116A SCR Module TO-240AA 1200V - 2.4kA Panel Mount - 150mA - - 2.5V - 200mA
RS Stock No. 167-320
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.VS-40TPS12-M3
Brand :Vishay
THB225.90
Each
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35A SCR TO-247AC 1200V - 600A Through Hole - 150mA - - 2.5V - 150mA
RS Stock No. 145-2566
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.VS-40TPS12-M3
Brand :Vishay
THB194.523
Each (In a Tube of 25)
Units
35A SCR TO-247AC 1200V - 600A Through Hole - 150mA - - 2.5V - 150mA
RS Stock No. 668-7060
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCD95-12io1B
Brand :IXYS
THB904.98
Each
Units
116A SCR Module TO-240AA 1200V - 2.4kA Panel Mount - 150mA - - 2.5V - 200mA
RS Stock No. 193-802
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CS19-12HO1
Brand :IXYS
THB61.804
Each: (In a Pack of 5)
Units
19A SCR TO-220AB 1200V - 180A Through Hole - 28mA - - 1.5V - 50mA
RS Stock No. 177-5363
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCD95-12IO1B
Brand :IXYS
THB876.838
Each (In a Box of 36)
Units
116A SCR Module TO-240AA 1200V - 2.4kA Panel Mount - 150mA - - 2.5V - 200mA
RS Stock No. 183-2268
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SKCH 28/12
Brand :Semikron
THB1,966.44
Each
Units
30A SCR Module SEMIPONT®1 1200V - 0.32kA Screw Mount - 100mA - - 2V - 150mA