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. 919-4404
Mfr. Part No.VS-40TPS12A-M3
BrandVishay
$12.936
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. 165-7721
Mfr. Part No.P0102DA 1AA3
$0.24
Each (In a Bag of 2500)
units
0.5A SCR TO-92 400V 8A Through Hole 0.2mA 0.8V 5mA 3 4.7mm 3.7mm 4.4mm 4.7 x 3.7 x 4.4mm
RS Stock No. 700-5591
Mfr. Part No.VS-70TPS12PBF
BrandVishay
$13.84
Each
units
70A SCR Super-247 1200V 1400A Through Hole 100mA 1.5V 200mA 3 16.1mm - 20.8mm -
RS Stock No. 168-6670
Mfr. Part No.TYN812RG
$2.278
Each (In a Tube of 50)
units
8A SCR TO-220AB 800V 145A Through Hole 15mA 1.3V 30mA 3 10.4mm 4.6mm 9.15mm 10.4 x 4.6 x 9.15mm
RS Stock No. 800-9200
Mfr. Part No.2N6509TG
BrandLittelfuse
$2.068
Each (In a Pack of 10)
units
- SCR TO-220 800V 250A Through Hole 75mA 1.5V 80mA 3 10.28mm 4.82mm 15.75mm 10.28 x 4.82 x 15.75mm
RS Stock No. 103-2980
Mfr. Part No.C106D1G
BrandLittelfuse
$0.509
Each (In a Box of 500)
units
2.55A SCR TO-225 400V 20A Through Hole 0.2mA 0.8V 3mA 3 7.74mm 2.66mm 11.04mm 7.74 x 2.66 x 11.04mm
RS Stock No. 486-5485
Mfr. Part No.P0111MN 5AA4
$1.57
Each (In a Pack of 5)
units
0.5A SCR SOT-223 600V 8A Surface Mount 0.025mA 0.8V 5mA 3+Tab 6.5mm 3.5mm 1.8mm 6.5 x 3.5 x 1.8mm
RS Stock No. 862-4929
Mfr. Part No.2N6508G
BrandLittelfuse
$2.068
Each (In a Pack of 10)
units
16A SCR TO-220AB 600V 250A Through Hole 75mA 1.5V 80mA 3 10.28mm 4.82mm 15.75mm 10.28 x 4.82 x 15.75mm
RS Stock No. 170-8382
Mfr. Part No.VS-10TTS08STRLPBF
BrandVishay
$1.633
Each (On a Reel of 800)
units
- - - - - - - - - - - - - -
RS Stock No. 768-9026
Mfr. Part No.N1718NC180
BrandIXYS
$482.60
Each
units
1718A PCT N1718 2000V 27200A Stud 300mA 3V 1000mA 2 - - 27.7mm 74 (Dia.) x 27.7mm
RS Stock No. 168-6654
Mfr. Part No.X0202MN 5BA4
$0.619
Each (On a Reel of 1000)
units
0.8A SCR SOT-223 600V 25A Surface Mount 0.2mA 0.8V 5mA 3+Tab 6.5mm 3.5mm 1.8mm 6.5 x 3.5 x 1.8mm
RS Stock No. 166-0476
Mfr. Part No.BT148W-600R
$0.414
Each (On a Reel of 1000)
units
0.6A SCR SOT-223 (SC-73) 600V 11A Surface Mount 0.2mA 1.5V 6mA 4 6.7mm 3.7mm 1.7mm 6.7 x 3.7 x 1.7mm
RS Stock No. 168-6656
Mfr. Part No.P0102DN 5AA4
$0.654
Each (On a Reel of 1000)
units
0.5A SCR SOT-223 400V 8A Surface Mount 0.2mA 0.8V 5mA 3+Tab 6.5mm 3.5mm 1.8mm 6.5 x 3.5 x 1.8mm
RS Stock No. 687-0993
Mfr. Part No.P0102DA 5AL3
$0.584
Each (In a Pack of 25)
units
0.5A SCR TO-92 400V 8A Through Hole 0.2mA 0.8V 5mA 3 4.7mm 3.7mm 4.4mm 4.7 x 3.7 x 4.4mm
RS Stock No. 168-6278
Mfr. Part No.P0111MN 5AA4
$0.672
Each (On a Reel of 1000)
units
0.5A SCR SOT-223 600V 8A Surface Mount 0.025mA 0.8V 5mA 3+Tab 6.5mm 3.5mm 1.8mm 6.5 x 3.5 x 1.8mm
RS Stock No. 145-1945
Mfr. Part No.VS-25RIA120
BrandVishay
$25.41
Each (In a Bag of 100)
units
25A SCR TO-48 1200V 440A Thread Mount 60mA 2V 130mA 2 16.51mm - 41.8mm -
RS Stock No. 102-4088
Mfr. Part No.TS820-600T
$2.068
Each (In a Tube of 50)
units
5A SCR TO-220AB 600V 73A Through Hole 0.2mA 0.8V 5mA 3 10.4mm 4.6mm 9.15mm 10.4 x 4.6 x 9.15mm
RS Stock No. 395-9309
Mfr. Part No.VS-ST330S12P1PBF
BrandVishay
$306.70
Each
units
330A SCR TO-118 1200V 9420A Stud 200mA 3V 600mA 3 49mm 42.5mm 74.5mm 49 x 42.5 x 74.5mm
RS Stock No. 192-4998
Mfr. Part No.TN1605H-6G
$1.743
Each (In a Pack of 10)
units
10A SCR D2PAK 600V 153A Surface Mount 6mA 1.3V 20mA 3 10.28mm 9.35mm 4.6mm 10.28 x 9.35 x 4.6mm
RS Stock No. 166-0034
Mfr. Part No.BT149G
$0.221
Each (On a Tape of 2000)
units
0.5A SCR TO-92 600V 9A Through Hole 200µA 0.8V 5mA 3 4.2mm 4.8mm 5.2mm 4.2 x 4.8 x 5.2mm
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