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. 379-8031
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.VS-T90RIA120
Brand :Vishay
THB1,055.77
Each
Units
90A SCR D 55 1200V - 1870A Panel Mount - 120mA - - 2.5V - 200mA
RS Stock No. 817-2459
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.VS-50RIA100
Brand :Vishay
THB646.81
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80A SCR TO-65 1000V - 1490A Thread Mount - 250mA - - 3.5V - 200mA
RS Stock No. 700-5639
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.VS-ST380CH06C1
Brand :Vishay
THB5,825.47
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960A PCT TO-200AB 600V - 13000A Screw Mount - 200mA - - 3V - 600mA
RS Stock No. 509-471
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BT169D,112
THB7.276
Each: (In a Pack of 50)
Units
0.5A SCR SPT 400V - 9A Through Hole - 0.2mA - - 0.8V - 5mA
RS Stock No. 708-4222
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.VS-16TTS08-M3
Brand :Vishay
THB105.32
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10A SCR TO-220AC 800V - 200A Through Hole - 60mA - - 2V - 100mA
RS Stock No. 485-4299
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BT169G,112
THB10.164
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0.5A SCR SPT 600V - 9A Through Hole - 0.2mA - - 0.8V - 5mA
RS Stock No. 168-4652
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CS45-12IO1
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THB133.34
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48A SCR TO-247AD 1200V - 560A Through Hole - 200mA - - 1.6V - 100mA
RS Stock No. 918-9802
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.VS-16TTS08-M3
Brand :Vishay
THB125.901
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10A SCR TO-220AB 800V - 200A Through Hole - 90mA - - 3V - 150mA
RS Stock No. 214-4253
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SKKH 92/08 E
Brand :Semikron
THB2,839.25
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95A SCR Module SEMIPACK1 800V - 2kA Panel Mount - 150mA - - 3V - 250mA
RS Stock No. 227-9040
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THB343.56
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16A SCR TO-48 600V - 360A Thread Mount - 60mA - - 2V - 130mA
RS Stock No. 395-9258
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.VS-ST180S12P1VPBF
Brand :Vishay
THB2,412.98
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200A SCR TO-93 1200V - 5230A Thread Mount - 150mA - - 3V - 600mA
RS Stock No. 165-2605
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.VS-T90RIA120
Brand :Vishay
THB1,119.294
Each (In a Box of 10)
Units
90A SCR D 55 1200V - 1870A Panel Mount - 120mA - - 2.5V - 200mA
RS Stock No. 169-5834
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.16RIA120
Brand :Vishay
THB569.514
Each (In a Bag of 100)
Units
16A SCR TO-48 1200V - 360A Thread Mount - 60mA - - 2V - 130mA
RS Stock No. 436-8114
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BT152-800R,127
THB38.588
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13A SCR TO-220AB 800V - 220A Through Hole - 32mA - - 1.5V - 60mA
RS Stock No. 659-680
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SKKT 162/12 E
Brand :Semikron
THB2,039.07
Each
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156A SCR Module SEMIPACK2 1200V - 5.4kA Panel Mount - 150mA - - 2V - 400mA
RS Stock No. 905-6204
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SKKT 250/16E
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THB9,145.72
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250A SCR A 73b 1600V - 9000A Panel Mount - 200mA - - 3V - 500mA
RS Stock No. 145-9514
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Brand :Infineon
THB4,648.659
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92A PCT Module 20mm 1200V - 2050A Panel Mount - 120mA - - 1.4V - 200mA
RS Stock No. 505-3087
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SKKH162/18E
Brand :Semikron
THB2,015.52
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156A SCR Module SEMIPACK2 1800V - 5.4kA Panel Mount - 150mA - - 2V - 400mA
RS Stock No. 905-6087
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SKKT 42/12 E
Brand :Semikron
THB976.46
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40A SCR SEMIPACK1 1200V - 1000A Panel Mount - 150mA - - 3V - 250mA
RS Stock No. 168-4596
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCC132-12IO1
Brand :IXYS
THB1,779.26
Each (In a Box of 6)
Units
130A SCR Module Y4 M6 1200V - 5.08kA Panel Mount - 150mA - - 2.5V - 200mA