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 it’s 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庫存編號 509-566
製造零件編號BT151-500R,127
HK$3.632
/個 (每包:10個)
單位
7.5A SCR TO-220AB 500V 132A Through Hole 15mA 1.5V 20mA 3 10.3mm 4.7mm 9.4mm 10.3 x 4.7 x 9.4mm
RS庫存編號 168-9404
製造零件編號BT151-500R,127
HK$3.785
毎管:50 個
單位
7.5A SCR TO-220AB 500V 132A Through Hole 15mA 1.5V 20mA 3 10.3mm 4.7mm 9.4mm 10.3 x 4.7 x 9.4mm
RS庫存編號 484-2864
製造零件編號BT151-800R
HK$7.214
/個 (每包:5個)
單位
7.5A SCR TO-220AB 800V 132A Through Hole 15mA 1.5V 20mA 3 10.3mm 4.7mm 9.4mm 10.3 x 4.7 x 9.4mm
RS庫存編號 168-9625
製造零件編號BT152-400R,127
HK$7.104
毎管:50 個
單位
13A SCR TO-220AB 450V 220A Through Hole 32mA 1.5V 60mA 3 10.3mm 4.7mm 9.4mm 10.3 x 4.7 x 9.4mm
RS庫存編號 484-2836
製造零件編號BT145-800R,127
HK$13.308
/個 (每包:5個)
單位
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庫存編號 103-5680
製造零件編號BT152-800R
HK$6.843
毎管:50 個
單位
13A SCR TO-220AB 800V 220A Through Hole 32mA 1.5V 60mA 3 10.3mm 4.7mm 9.4mm 10.3 x 4.7 x 9.4mm
RS庫存編號 485-4277
製造零件編號BT150-500R
HK$4.144
/個 (每包:5個)
單位
2.5A SCR TO-220AB 500V 38A Through Hole 0.2mA 1.5V 6mA 3 10.3mm 4.7mm 9.4mm 10.3 x 4.7 x 9.4mm
RS庫存編號 436-8114
製造零件編號BT152-800R
HK$7.946
/個 (每包:5個)
單位
13A SCR TO-220AB 800V 220A Through Hole 32mA 1.5V 60mA 3 10.3mm 4.7mm 9.4mm 10.3 x 4.7 x 9.4mm
RS庫存編號 509-465
製造零件編號BT168GW
HK$1.222
/個 (每包:20個)
單位
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
RS庫存編號 166-0034
製造零件編號BT149G
HK$0.804
Each (On a Tape of 2000)
單位
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
RS庫存編號 792-0718
製造零件編號BT151S-800R
HK$5.247
/個 (每包:10個)
單位
7.5A SCR DPAK (TO-252) 800V 132A Surface Mount 15mA 1.5V 20mA 3 6.73mm 6.22mm 2.38mm 6.73 x 6.22 x 2.38mm
RS庫存編號 262-488
製造零件編號BT152-600R
HK$15.86
單位
13A SCR TO-220AB 650V 220A Through Hole 32mA 1.5V 60mA 3 10.3mm 4.7mm 9.4mm 10.3 x 4.7 x 9.4mm
RS庫存編號 509-538
製造零件編號BT148-400R
HK$2.935
/個 (每包:10個)
單位
2.5A SCR SOT-82 400V 38A Through Hole 0.2mA 1.5V 6mA 3 7.8mm 2.8mm 11.1mm 7.8 x 2.8 x 11.1mm
RS庫存編號 792-0712
製造零件編號BT152-500RT
HK$5.943
/個 (每包:10個)
單位
13A SCR TO-220AB 500V 220A Through Hole 32mA 1.5V 60mA 3 10.3mm 4.7mm 16 (With Tab)mm 10.3 x 4.7 x 16mm
RS庫存編號 103-7541
製造零件編號BT145-800R,127
HK$8.033
毎管:50 個
單位
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庫存編號 178-1426
製造零件編號BT258X-500R
HK$4.903
毎管:50 個
單位
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庫存編號 166-1581
製造零件編號BT151S-650R
HK$3.154
個 (在毎卷:2500)
單位
7.5A SCR DPAK (TO-252) 650V 132A Surface Mount 15mA 1.5V 20mA 3 6.73mm 6.22mm 2.38mm 6.73 x 6.22 x 2.38mm
RS庫存編號 485-4283
製造零件編號BT151-650R,127
HK$6.476
/個 (每包:5個)
單位
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庫存編號 816-7823
製造零件編號BT152B-600R
HK$9.772
/個 (每包:5個)
單位
13A SCR SOT-404 650V 220A Surface Mount 32mA 1.5V 60mA 3 10.3mm 11mm 4.5mm 10.3 x 11 x 4.5mm
RS庫存編號 166-0389
製造零件編號BT169G,112
HK$0.61
個 (以毎袋:1000)
單位
0.5A SCR SPT 600V 9A Through Hole 0.2mA 0.8V 5mA 3 4.8mm 4.2mm 5.2mm 4.8 x 4.2 x 5.2mm