MPN

Thyristors

Thyristors are four-layer semiconductor devices, 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. You can learn more in our complete guide to thyristors.

How do thyristors work?

Thyristors usually consist 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 Thyristors are 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 thyristors

Silicon controlled rectifier (SCR) - The basic purpose of an 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 an 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., Firing circuit commander modules are required for this.
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 a four-layer diode but it can conduct in both directions meaning it can contact both AC and DC currents.

Applications of thyristors

Thyristors are commonly found in many everyday applications such as:

Motor speed controls
Pressure control systems
Light dimmers
Liquid level regulators

1088 Products showing for Thyristors

1 of 55

Sort By

Compare Product Details

Results per page

In Stock Semikron Danfoss SKKT 162/16 E, Dual Thyristor Module 1600 V, 156 A 150 mA 5.4 kA 1.6 V RS Stock No. 195-4649 Mfr. Part No. SKKT 162/16 E Subtotal (1 unit) $154.96(exc. GST) $154.96/unit Quantity	Semikron Danfoss	Dual Thyristor Module	-	156A	SEMIPACK2	SCR	-	1600V	-	5.4kA	Panel	-	-	-	150mA	-	-	-	-	-	7	2V	400mA	-40°C	125°C	-	-	-	No	-	-
In Stock United Automation MAT, Thyristor Trigger Module RS Stock No. 489-3480 Mfr. Part No. MAT Subtotal (1 unit) $80.09(exc. GST) $80.09/unit Quantity	United Automation	Thyristor Trigger Module	-	-	-	-	-	-	-	-	Panel	-	-	-	-	-	-	-	-	-	-	-	-	-	65°C	-	42mm	MAT	BS 7671	23mm	-
In Stock Semikron Danfoss SKKT 92/16 E, Dual Thyristor Module 1600 V, 100 A 150 mA 2.5 kA 1.35 V RS Stock No. 905-6128 Mfr. Part No. SKKT 92/16 E Subtotal (1 unit) $84.65(exc. GST) $84.65/unit Quantity	Semikron Danfoss	Dual Thyristor Module	-	100A	A-10	SCR	-	1600V	-	2.5kA	Panel	-	-	-	150mA	-	-	-	-	-	3	3V	250mA	-40°C	125°C	-	-	-	No	-	-
In Stock United Automation ZVS-16DV, Variable AC Voltage Regulator 600 V, 16 A 200 A RS Stock No. 214-3979 Mfr. Part No. ZVS-16DV Subtotal (1 unit) $175.05(exc. GST) $175.05/unit Quantity	United Automation	Variable AC Voltage Regulator	-	16A	-	-	-	600V	-	200A	Surface	-	-	-	-	-	-	-	-	-	-	-	-	-20°C	85°C	-	-	ZVS 16DV	BS 7671	-	-
In Stock Semikron Danfoss SKKT 162/12 E, Dual Thyristor Module 1200 V, 156 A 150 mA 5.4 kA 1.6 V RS Stock No. 659-680 Mfr. Part No. SKKT 162/12 E Subtotal (1 unit) $138.60(exc. GST) $138.60/unit Quantity	Semikron Danfoss	Dual Thyristor Module	-	156A	SEMIPACK2	SCR	-	1200V	-	5.4kA	Panel	-	-	-	150mA	-	-	-	-	-	7	2V	400mA	-40°C	125°C	-	-	-	No	-	-
In Stock Semikron Danfoss SKKT 132/12 E, Dual Thyristor Module 1200 V, 137 A 150 mA 4.7 kA 1.8 V RS Stock No. 659-668 Mfr. Part No. SKKT 132/12 E Subtotal (1 unit) $267.90(exc. GST) $267.90/unit Quantity	Semikron Danfoss	Dual Thyristor Module	-	137A	SEMIPACK2	SCR	-	1200V	-	4.7kA	Panel	-	-	-	150mA	-	-	-	-	-	7	2V	400mA	-40°C	125°C	-	-	-	No	-	-
In Stock United Automation PAC-2, Phase Angle Power Control Module, 25 A 250 A RS Stock No. 379-6518 Mfr. Part No. PAC-2 Subtotal (1 unit) $132.33(exc. GST) $132.33/unit Quantity	United Automation	Phase Angle Power Control Module	-	25A	-	-	-	-	-	250A	Surface	-	-	-	-	-	-	-	-	-	-	-	-	-	65°C	-	-	PAC2	I.E.T. Regulations (BS7671)	-	-
In Stock Semikron Danfoss SKT 551/16 E, Thyristor 1600 V, 391 A 250 mA 9 kA 1.65 V RS Stock No. 905-6162 Mfr. Part No. SKT 551/16 E Subtotal (1 unit) $240.19(exc. GST) $240.19/unit Quantity	Semikron Danfoss	Thyristor	-	391A	B-11	SCR	-	1600V	-	9kA	Panel	-	-	-	250mA	-	-	-	-	-	3	3V	500mA	-40°C	125°C	-	-	-	No	-	-
In Stock Littelfuse 2N6507G, Thyristor 400 V, 16 A 30 mA 250 A 1.8 V RS Stock No. 544-9999 Mfr. Part No. 2N6507G Subtotal (1 unit) $6.27(exc. GST) $6.27/unit Quantity	Littelfuse	Thyristor	-	16A	TO-220	SCR	-	400V	-	250A	Through Hole	-	-	-	30mA	-	-	-	-	-	3	1.5V	40mA	-40°C	125°C	-	-	2N650x	No	-	-
In Stock Semikron Danfoss SKKT 106/16 E, Dual Thyristor Module 1600 V, 106 A 150 mA 2.25 kA 1.65 V RS Stock No. 905-6122 Mfr. Part No. SKKT 106/16 E Subtotal (1 unit) $125.38(exc. GST) $125.38/unit Quantity	Semikron Danfoss	Dual Thyristor Module	-	106A	A-46	SCR	-	1600V	-	2.25kA	Panel	-	-	-	150mA	-	-	-	-	-	7	3V	250mA	-40°C	130°C	-	-	-	No	-	-
In Stock United Automation PSR-25, Phase Angle Power Control Module, 25 A 250 A RS Stock No. 841-924 Mfr. Part No. PSR-25 Subtotal (1 unit) $153.52(exc. GST) $153.52/unit Quantity	United Automation	Phase Angle Power Control Module	-	25A	-	-	-	-	-	250A	Chassis	-	-	-	-	-	-	-	-	-	-	-	-	-20°C	65°C	-	-	PSR	I.E.T. Regulations (BS7671), EMC Directive, Low Voltage Directive (LVD)	-	-
In Stock Semikron Danfoss SKKT 57/16 E, Dual Thyristor Module 1600 V, 50 A 150 mA 1.5 kA 1.65 V RS Stock No. 905-6106 Mfr. Part No. SKKT 57/16 E Subtotal (1 unit) $74.34(exc. GST) $74.34/unit Quantity	Semikron Danfoss	Dual Thyristor Module	-	50A	A-46	SCR	-	1600V	-	1.5kA	Panel	-	-	-	150mA	-	-	-	-	-	7	3V	250mA	-40°C	125°C	-	-	-	No	-	-
In Stock Semikron Danfoss SKKH 106/12 E, Diode/Thyristor Module SCR 1200 V, 106 A 150 mA 2.25 kA 1.65 V RS Stock No. 468-2353 Mfr. Part No. SKKH 106/12 E Subtotal (1 unit) $83.56(exc. GST) $83.56/unit Quantity	Semikron Danfoss	Diode/Thyristor Module SCR	-	106A	SEMIPACK1	SCR	-	1200V	-	2.25kA	Panel	-	-	-	150mA	-	-	-	-	-	5	3V	250mA	-40°C	130°C	-	-	-	No	-	-
In Stock United Automation QVR-TB-RFI, AC Regulator with RFI Suppression, 17 A 250 A RS Stock No. 214-3963 Mfr. Part No. QVR-TB-RFI Subtotal (1 unit) $188.52(exc. GST) $188.52/unit Quantity	United Automation	AC Regulator with RFI Suppression	-	17A	-	TRIAC	-	-	-	250A	-	-	-	-	-	-	-	-	-	-	-	-	-	-20°C	65°C	-	-	-	UL Certified MARK E319489	-	-
Temporarily out of stock Semikron Danfoss SKKT 92B16E, Dual Thyristor Module 1600 V, 95 A 150 mA 2 kA 1.65 V RS Stock No. 271-814 Mfr. Part No. SKKT 92B16E Subtotal (1 unit) $91.25(exc. GST) $91.25/unit Quantity	Semikron Danfoss	Dual Thyristor Module	-	95A	SEMIPACK1	SCR	-	1600V	-	2kA	Panel	-	-	-	150mA	-	-	-	-	-	7	3V	250mA	-40°C	125°C	-	-	-	No	-	-
In Stock United Automation TPSR-25, Variable AC Voltage Regulator Modular Power Controller, 25 A 250 A RS Stock No. 841-930 Mfr. Part No. TPSR-25 Subtotal (1 unit) $96.16(exc. GST) $96.16/unit Quantity	United Automation	Variable AC Voltage Regulator Modular Power Controller	-	25A	-	-	-	-	-	250A	-	-	-	-	-	-	-	-	-	-	-	-	-	0°C	65°C	-	-	TPSR	I.E.T. Regulations (BS7671)	-	-
Temporarily out of stock Semikron Danfoss SKKT 132/16 E, Dual Thyristor Module 1600 V, 137 A 150 mA 4.7 kA 1.8 V RS Stock No. 262-8391 Mfr. Part No. SKKT 132/16 E Subtotal (1 unit) $154.32(exc. GST) $154.32/unit Quantity	Semikron Danfoss	Dual Thyristor Module	-	137A	SEMIPACK2	SCR	-	1600V	-	4.7kA	Panel	-	-	-	150mA	-	-	-	-	-	7	2V	400mA	-40°C	125°C	-	-	-	No	-	-
In Stock United Automation D45047, Thyristor 1600 V 95 A, 95 A 1.58 V RS Stock No. 628-613 Mfr. Part No. D45047 Subtotal (1 unit) $78.39(exc. GST) $78.39/unit Quantity	United Automation	Thyristor	-	95A	-	-	-	1600V	-	95A	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	IRK. 91	No	-	-
In Stock United Automation A407649, Thyristor Power Controller RS Stock No. 216-3053 Mfr. Part No. A407649 Subtotal (1 unit) $237.16(exc. GST) $237.16/unit Quantity	United Automation	Thyristor Power Controller	-	-	-	Triac Power Device	-	-	-	-	Top, Vertical, Bottom	-	-	-	-	-	-	-	-	-	-	-	-	85°C	90°C	-	-	PR1-E	CE marking, RoHS	-	-
In Stock WeEn Semiconductors Co., Ltd, Thyristor 800 V, 7.5 A 15 mA 132 A 1.75 V RS Stock No. 484-2864 Mfr. Part No. BT151-800R,127 Subtotal (1 pack of 5 units) $8.87(exc. GST) $1.774/unit Quantity	WeEn Semiconductors Co., Ltd	Thyristor	-	7.5A	TO-220	SCR	-	800V	-	132A	Through Hole	-	-	-	15mA	-	-	-	-	-	3	1.5V	20mA	-40°C	125°C	-	-	-	No	-	-