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. 920-0791
Mfr. Part No.CS45-16IO1
BrandIXYS
SGD6.62
Each (In a Tube of 30)
units
48A SCR TO-247AD 1600V 560A Through Hole 100mA 1.5V 100mA 3 16.26mm - 21.46mm -
RS Stock No. 103-2940
Mfr. Part No.2N6509G
BrandLittelfuse
SGD2.293
Each (In a Box of 500)
units
16A SCR TO-220AB 800V 250A Through Hole 30mA 1.5V 40mA 3 10.28mm 4.82mm 9.28mm 10.28 x 4.82 x 9.28mm
RS Stock No. 165-6236
Mfr. Part No.VS-50RIA100
BrandVishay
SGD22.98
Each (In a Bag of 100)
units
80A SCR TO-65 1000V 1490A Thread Mount 250mA 3.5V 200mA 2 19.2mm 17.35mm 42.5mm 19.2 x 17.35 x 42.5mm
RS Stock No. 484-2836
Mfr. Part No.BT145-800R,127
SGD2.44
Each (In a Pack of 5)
units
16A SCR TO-220AB 800V 330A Through Hole 35mA 1V 60mA 3 10.3mm 4.7mm 9.4mm 10.3 x 4.7 x 9.4mm
RS Stock No. 687-0943
Mfr. Part No.TN1215-600G-TR
SGD2.35
Each (In a Pack of 5)
units
8A SCR D2PAK (TO-263) 600V 145A Surface Mount 15mA 1.3V 30mA 3 10.28mm 9.35mm 4.6mm 10.28 x 9.35 x 4.6mm
RS Stock No. 825-2631
Mfr. Part No.N0795YN180
BrandIXYS
SGD208.33
Each
units
795A PCT - 1000 → 1800V 10500A Screw Mount 150mA 2.50V 300mA - - - 14mm 42 (Dia.) x 14mm
RS Stock No. 878-1794
Mfr. Part No.Q8010L4
BrandLittelfuse
SGD2.482
Each (In a Pack of 500)
units
10A - TO-220 800V 120A Through Hole 25 mA, 50 mA 1.3V 35mA 3 10.67mm 4.78mm 15.75mm 10.67 x 4.78 x 15.75mm
RS Stock No. 878-1811
Mfr. Part No.SK025L
BrandLittelfuse
SGD3.884
Each (In a Pack of 10)
units
25A SCR TO-220 1000V 300A Through Hole 35mA 1.5V 50mA 3 10.67mm 4.78mm 15.75mm 10.67 x 4.78 x 15.75mm
RS Stock No. 177-5218
Mfr. Part No.MCR08BT1G
BrandLittelfuse
SGD0.279
Each (On a Reel of 1000)
units
0.8A SCR SOT-223 200V 8A Surface Mount 200µA 0.8V 5mA 3+Tab 6.7mm 3.7mm 1.65mm 6.7 x 3.7 x 1.65mm
RS Stock No. 125-0062
Mfr. Part No.MCR12DSMT4G
BrandLittelfuse
SGD0.885
Each (On a Reel of 2500)
units
- SCR DPAK (TO-252) 600V 100A Surface Mount 300µA 1.5V 10mA 3 6.73mm 6.22mm 2.38mm 6.73 x 6.22 x 2.38mm
RS Stock No. 379-8025
Mfr. Part No.VS-T90RIA100
BrandVishay
SGD62.59
Each
units
90A SCR D 55 1000V 1870A Panel Mount 120mA 2.5V 200mA 3 41mm 27mm 25mm 41 x 27 x 25mm
RS Stock No. 760-9301
Mfr. Part No.DCR750D22
BrandDynex
SGD188.93
Each
units
750A SCR Type G 2200V 10000A Stud 300mA 3V 200mA 3 - - 14.5mm 47 (Dia.) x 14.5mm
RS Stock No. 165-2790
Mfr. Part No.VS-111RKI120PBF
BrandVishay
SGD62.324
Each (In a Bag of 25)
units
110A PCT TO-94 1200V 2180A Thread Mount 120mA 2V 200mA 3 29.5mm 27mm 188mm 29.5 x 27 x 188mm
RS Stock No. 167-465
Mfr. Part No.VS-10TTS08S-M3
BrandVishay
SGD2.62
Each (In a Pack of 5)
units
6.5A SCR D2PAK (TO-263) 800V 140A Surface Mount 15mA 1V 30mA 3 10.67mm 9.65mm 4.83mm 10.67 x 9.65 x 4.83mm
RS Stock No. 862-4929
Mfr. Part No.2N6508G
BrandLittelfuse
SGD3.263
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. 877-3046
Mfr. Part No.TN2540-800G-TR
SGD4.20
Each (In a Pack of 5)
units
16A SCR D2PAK (TO-263) 800V 314A Surface Mount 40mA 1.3V 50mA 3 10.28mm 9.35mm 4.6mm 10.28 x 9.35 x 4.6mm
RS Stock No. 227-9056
Mfr. Part No.VS-16RIA80
BrandVishay
SGD16.82
Each
units
16A SCR TO-48 800V 360A Thread Mount 60mA 2V 130mA 2 16.51mm - 41.8mm -
RS Stock No. 793-1926
Mfr. Part No.S602TSRP
BrandLittelfuse
SGD0.836
Each (In a Pack of 10)
units
1.5A SCR SOT-223 600V 15A Surface Mount 200µA 0.8V 5mA 3+Tab 6.7mm 3.7mm 1.7mm 6.7 x 3.7 x 1.7mm
RS Stock No. 760-9288
Mfr. Part No.DCR370T18
BrandDynex
SGD110.29
Each
units
370A SCR Type G 1800V 5000A Stud 300mA 3V 200mA 3 - - 13.5mm 42 (Dia.) x 13.5mm
RS Stock No. 687-0940
Mfr. Part No.P0102BL 5AA4
SGD0.934
Each (In a Pack of 10)
units
0.16A SCR SOT-23 200V 7A Surface Mount 0.2mA 0.8V 6mA 3 2.9mm 1.3mm 0.95mm 2.9 x 1.3 x 0.95mm
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