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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Beskrivning Pris 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
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0.9A SCR TO-202 600V 33A Through Hole 0.05mA 0.8V 5mA 3 10.1mm 4.5mm 7.3mm 10.1 x 4.5 x 7.3mm
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200A SCR TO-93 1200V 5230A Thread Mount 150mA 3V 600mA 3 35mm 30.33mm 49.5mm 35 x 30.33 x 49.5mm
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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
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19A SCR TOP3 1200V 420A Through Hole 50mA 1.5V 75mA 3 15.5mm 4.6mm 21.1mm 15.5 x 4.6 x 21.1mm
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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
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80A PCT TO-94 800V 1990A Thread Mount 120mA 2.5V 200mA 3 29.5mm 27mm 188mm 29.5 x 27 x 188mm
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600A PCT BG-PB501-1 1200V 17000A Panel Mount 250mA 2.2V 300mA 5 101mm 50mm 52mm 101 x 50 x 52mm
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20A SCR TO-247 800V 300A Through Hole 60mA 2.5V 100mA 3 15.87mm 5.31mm 20.7mm 15.87 x 5.31 x 20.7mm
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50A SCR TO-247 800V 731A Through Hole 50mA 1.5V 100mA 3 15.75mm 5.15mm 20.15mm 15.75 x 5.15 x 20.15mm
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Tillv. art.nrCLA30E1200HB
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30A SCR TO-247 1200V 325A Through Hole 50mA 1.6V 60mA 3 16.24mm 5.3mm 21.45mm 16.24 x 5.3 x 21.45mm
RS-artikelnummer 123-1462
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16A SCR TO-220AB 600V 190 A @ 50 Hz, 200 A @ 60 Hz Through Hole 40mA 1.3V 50mA 3 10.36mm 4.67mm 15.35mm 10.36 x 4.67 x 15.35mm
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559A PCT BG-T4814K0-1 1600V 8000A Stud 200mA 2V 300mA 5 - - 14.5mm 48 (Dia.) x 14.5 (Height)mm
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80A SCR PLUS247 1200V 970A Through Hole 80mA 1.6V 100mA 3 16.13mm 5.21mm 21.34mm 16.13 x 5.21 x 21.34mm
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0.63A SCR SOT-223 (SC-73) 600V 9A Surface Mount 0.2mA 0.8V 5mA 4 6.7mm 3.7mm 1.7mm 6.7 x 3.7 x 1.7mm
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8A SCR TO-220AB 600V 100A Through Hole 200µA 1.5V 6mA 3 10.28mm 4.82mm 15.75mm 10.28 x 4.82 x 15.75mm
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