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 its 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 Stock No. 178-5036
Mfr. Part No.BT148-600R
$0.48
Each (In a Tube of 120)
units
2.5A SCR SOT-82 600V 38A Through Hole 0.2mA 1.5V 6mA 3 7.8mm 2.8mm 11.1mm 7.8 x 2.8 x 11.1mm
RS Stock No. 714-2643
Mfr. Part No.BTW69-800RG
$12.34
Each
units
32A SCR TOP3 800V 610A Through Hole 80mA 1.3V 150mA 3 15.5mm 4.6mm 12.85mm 15.5 x 4.6 x 12.85mm
RS Stock No. 795-9110
Mfr. Part No.X0403MF 1AA2
$1.28
Each (In a Pack of 10)
units
4A SCR TO-202 600V 33A Through Hole - 0.8V 5mA 3 10.1mm 4.5mm 7.3mm 10.1 x 4.5 x 7.3mm
RS Stock No. 123-1461
Mfr. Part No.FS1209NH TU
$0.75
Each (In a Pack of 20)
units
12A SCR TO-220AB 800V 140 A @ 50 Hz, 145 A @ 60 Hz Through Hole 15mA 1.3V 30mA 3 10.36mm 4.67mm 15.35mm 10.36 x 4.67 x 15.35mm
RS Stock No. 110-6563
Mfr. Part No.TN1205T-600B-TR
$2.15
Each (In a Pack of 10)
units
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 Stock No. 166-1424
Mfr. Part No.BT169D
$0.127
Each (In a Bag of 1000)
units
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 Stock No. 166-0792
Mfr. Part No.TN1205T-600B-TR
$1.17
Each (On a Reel of 2500)
units
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 Stock No. 169-5881
Mfr. Part No.30TPS08PBF
BrandVishay
$2.912
Each (In a Tube of 25)
units
- - - - - - - - - - - - - -
RS Stock No. 169-5873
Mfr. Part No.VS-16TTS12PBF
BrandVishay
$4.53
Each (In a Tube of 50)
units
- - - - - - - - - - - - - -
RS Stock No. 687-1016
Mfr. Part No.TYN625RG
$2.75
Each (In a Pack of 2)
units
16A SCR TO-220AB 600V 314A Through Hole 40mA 1.3V 50mA 3 10.4mm 4.6mm 9.15mm 10.4 x 4.6 x 9.15mm
RS Stock No. 178-1426
Mfr. Part No.BT258X-500R
$0.741
Each (In a Tube of 50)
units
5A SCR TO-220F 500V 82A Through Hole 0.2mA 1.5V 6mA 3 10.3mm 4.6mm 9.3mm 10.3 x 4.6 x 9.3mm
RS Stock No. 357-4330
Mfr. Part No.VS-80RIA120PBF
BrandVishay
$72.38
Each
units
80A PCT TO-94 1200V 1990A Thread Mount 120mA 2.5V 200mA 3 29.5mm 27mm 188mm 29.5 x 27 x 188mm
RS Stock No. 509-471
Mfr. Part No.BT169D
$0.41
Each (In a Pack of 50)
units
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 Stock No. 169-5888
Mfr. Part No.180RKI80PBF
BrandVishay
$115.46
Each (In a Bag of 12)
units
180A SCR TO-93 800V 4000A Thread Mount 150mA 2.5V 600mA 3 - - 234.5mm 35 (Dia.) x 234.5mm
RS Stock No. 287-9684
Mfr. Part No.VS-16TTS12-M3
BrandVishay
$5.42
Each
units
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
RS Stock No. 760-9301
Mfr. Part No.DCR750D22
BrandDynex
$201.90
Each
units
750A SCR Type G 2200V 10000A Stud 300mA 3V 200mA 3 - - 14.5mm 47 (Dia.) x 14.5mm
RS Stock No. 485-4283
Mfr. Part No.BT151-650R,127
$1.198
Each (In a Pack of 5)
units
7.5A SCR TO-220AB 650V 132A Through Hole 15mA 1.5V 20mA 3 10.3mm 4.7mm 9.4mm 10.3 x 4.7 x 9.4mm
RS Stock No. 760-9291
Mfr. Part No.DCR590E22
BrandDynex
$168.37
Each
units
590A SCR Type G 2200V 7800A Stud 300mA 3V 200mA 3 - - 14.5mm 42 (Dia.) x 14.5mm
RS Stock No. 919-4404
Mfr. Part No.VS-40TPS12A-M3
BrandVishay
$10.48
Each (In a Tube of 25)
units
35A SCR TO-247AC 1200V 600A Through Hole 40mA 2.5V 150mA 3 15.87mm 5.31mm 20.7mm 15.87 x 5.31 x 20.7mm
RS Stock No. 169-5883
Mfr. Part No.80RIA120PBF
BrandVishay
$64.69
Each (In a Bag of 25)
units
80A PCT TO-94 1200V 1990A Thread Mount 120mA 2.5V 200mA 3 29.5mm 27mm 188mm 29.5 x 27 x 188mm
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