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. 687-1022
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.X0405MF 1AA2
THB19.638
Each: (In a Pack of 10)
Units
0.9A SCR TO-202 600V - 33A Through Hole - 0.05mA - - 0.8V - 5mA
RS Stock No. 700-5617
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.VS-P135
Brand :Vishay
THB1,276.12
Each
Units
25A SCR Module PACE-PAK 1200V - 0.375kA Screw Mount - 60mA - - 2V - 130mA
RS Stock No. 158-9059
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SKKT 57B12 E
Brand :Semikron
THB1,669.82
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50A SCR Module SEMIPACK1 1200V - 1.5kA Panel Mount - 150mA - - 3V - 250mA
RS Stock No. 168-9404
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BT151-500R,127
THB16.065
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Units
7.5A SCR TO-220AB 500V - 132A Through Hole - 15mA - - 1.5V - 20mA
RS Stock No. 485-4283
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BT151-650R,127
THB19.612
Each: (In a Pack of 5)
Units
7.5A SCR TO-220AB 650V - 132A Through Hole - 15mA - - 1.5V - 20mA
RS Stock No. 810-7392
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BTW69-600RG
THB204.88
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- SCR TOP3 - - - Through Hole - - - - - - -
RS Stock No. 829-0683
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THB255.75
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19A SCR TOP3 1200V - 420A Through Hole - 50mA - - 1.5V - 75mA
RS Stock No. 462-180
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCO500-18IO1
Brand :IXYS
THB6,319.64
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560A SCR Module Y1 CU 1800V - 17kA Panel Mount - 300mA - - 2V - 300mA
RS Stock No. 145-8860
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TD570N16KOFHPSA2
Brand :Infineon
THB7,014.19
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600A PCT Module 60mm 1600V - 17000A Panel Mount - 250mA - - 2.2V - 300mA
RS Stock No. 462-196
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCC501-16io2
Brand :IXYS
THB7,054.27
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985A SCR Module - 1600V - 16kA Panel Mount - 250mA - - 2.5V - 300mA
RS Stock No. 659-668
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SKKT 132/12 E
Brand :Semikron
THB3,336.46
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137A SCR Module SEMIPACK2 1200V - 4.7kA Panel Mount - 150mA - - 2V - 400mA
RS Stock No. 296-3981
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SKPC200-440
Brand :Semikron
THB5,177.70
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- - - - - - Screw Mount - - - - - - -
RS Stock No. 905-6099
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SKKT 42/16 E
Brand :Semikron
THB966.51
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40A SCR A 46 1600V - 1000A Panel Mount - 150mA - - 3V - 250mA
RS Stock No. 905-6106
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SKKT 57/16 E
Brand :Semikron
THB1,307.81
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Units
50A SCR A 46 1600V - 1500A Panel Mount - 150mA - - 3V - 250mA
RS Stock No. 165-5398
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TT180N16KOFHPSA1
Brand :Infineon
THB5,279.30
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180A PCT Module 34mm 1600V - 4800A Panel Mount - 150mA - - 2V - 200mA
RS Stock No. 462-186
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCC200-16IO1
Brand :IXYS
THB2,593.57
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216A SCR Module Y4 M6 1600V - 8.6kA Panel Mount - 150mA - - 2V - 150mA
RS Stock No. 232-9347
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.FC36M
THB10,382.87
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- - - - - - - - - 3500Vrms - - 5V dc -
RS Stock No. 839-1228
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TD570N16KOFHPSA2
Brand :Infineon
THB7,686.49
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600A PCT Module 60mm 1600V - 17000A Panel Mount - 250mA - - 2.2V - 300mA
RS Stock No. 168-4526
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCO500-18IO1
Brand :IXYS
THB5,489.03
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Units
560A SCR Module Y1 CU 1800V - 17kA Panel Mount - 300mA - - 2V - 300mA
RS Stock No. 668-7066
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCD95-08io1B
Brand :IXYS
THB859.67
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116A SCR Module TO-240AA 800V - 2.4kA Panel Mount - 150mA - - 2.5V - 200mA