Power Phase Control Thyristors SCR, Stud Package
Power phase control thyristors, also known as Silicon Controlled Rectifier (SCR), stud version are general-purpose thyristors, regulating and converting DC and AC currents to 400A at frequencies to 500 Hz in circuits with voltages to 4400V (depending on series).
Power stud thyristors series T have the following types (current): 100 A, 125 A, 160 A, 200 A, 250 A, 320 A, 400 Ampere.
Series of high-power stud thyristors
Part numbering guide for power stud thyristors
Quality declaration for power stud thyristors
The thyristor has an industry-standard ceramic housing making it easy to integrate the device into existing equipment.
The polarity of the thyristor is determined by the icon on the case. The base of the thyristor is the Anode, the flexible power lead is the Cathode, the flexible wire exiting the base of the power lead is the auxiliary cathode, the flexible wire exiting the case is the control electrode (Gate).
Thyristors are available in temperate, cold (UHL) and tropical (T) climates. The technical specifications, part numbering guide, polarity, dimensions and recommended coolers for thyristors are listed below.
Air and water heat sinks are used to cool the thyristors. To provide reliable thermal and electrical contact with the heatsink a tightening torque Md must be observed during assembly. For better heat dissipation of thyristor during assembly, heat conducting paste is used.
The thyristors have a sealed housing isolating the functional part and the semiconductor element from mechanical impacts and environment. This thyristor has a stud design with a flexible power lead. Stud thyristors are notable for their ability to be used on moving parts.
Thyristors from AS Energi Global LLC have the following features: low static and dynamic losses, high values of VDRM/VRRM, extensive experience of using the devices in various industries, range of voltages from 100 to 9000 V and amperages from 100 to 6300 A, high resistance to thermal and electric cycling, natural or forced air cooling.
Our company provides a quality guarantee for thyristors of 2 years from the date of purchase. When supplying thyristors, if necessary, we provide quality declaration and certificate of conformity.
The final price of phase control stud thyristors depends on the class, quantity, delivery terms, manufacturer, country of origin and form of payment.
For questions regarding the acquisition of High Power Diodes, Thyristors, send an email request to:
office@asenergi.com
And we will provide you a commercial offer for delivery.
For a large number, we will provide an individual price!!!
We are interested in local partners and distributors for long-term cooperation.
We are open to manufacture products at our production facilities according to your requests and technical task.
High Power Stud Thyristor Series:
![]() T151 |
![]() T161, T261, T361 |
![]() T171, T271, T371, T471 |
Power Thyristors T151 (100A)
Thyristors T151 | |||||||||
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Series | Price | Voltage VDRM, VRRM |
Average forward current IT(AV) (TC, ºC) |
Voltage code VRRM / 100 |
Weight | Package type | Heatsink | Data sheet | |
T151-100 | $5.67 | 300 - 1800V | 100A (90ºC) | 3 - 18 | 150 g | ST5 | O151 | ![]() |
Detailed specifications of Power Thyristors T151
Series | VDRM VRRM |
IT(AV) (TC) |
ITRMS | ITSM | Tjmax | VTM/ ITM |
VT(TO) | rT | IDRM IRRM |
(dVD/dt)cr | IGT | VGT | (diT/dt)cr | tq | i2·t | Rth(j-c) |
V | A(°C) | A | kA | °C | V/A | V | mOhm | mA | V/µs | mA | V | A/µs | µs | kA2·s | °C/W | |
T151-100 | 300-1800 | 100(90) | 157 | 2.0 | 140 | 1.80/314 | 1.15 | 2.40 | 15 | 20-1000 | 200 | 2.5 | 160 | 250 | 20 | 0.30 |
Power Thyristors T161 (125A – 200A)
Thyristors T161 | |||||||||
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Series | Price | Voltage VDRM, VRRM |
Average forward current IT(AV) (TC, ºC) |
Voltage code VRRM / 100 |
Weight | Package type | Heatsink | Data sheet | |
T161-125 | $10.80 | 100 - 1800V | 125A (101ºC) 183A (85ºC) |
1 - 18 | 240 g | ST6 | O171, O271, O371, O471, OM101 | ![]() |
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T161-160 | $18.16 | 300 - 1800V | 160A (87ºC) | 3 - 18 | 240 g | ST6 | O171, O271, O371, O471, OM101 | ![]() |
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T161-200 | $18.16 | 300 - 1600V | 200A (87ºC) | 3 - 16 | 240 g | ST6 | O171, O271, O371, O471, OM101 | ![]() |
Detailed specifications of Power Thyristors T161
Series | VDRM VRRM |
IT(AV) (TC) |
ITRMS | ITSM | Tjmax | VTM/ ITM |
VT(TO) | rT | IDRM IRRM |
(dVD/dt)cr | IGT | VGT | (diT/dt)cr | tq | i2·t | Rth(j-c) |
V | A(°C) | A | kA | °C | V/A | V | mOhm | mA | V/µs | mA | V | A/µs | µs | kA2·s | °C/W | |
T161-125 | 100-1800 | 125(101) 183(85) |
196 | 4.0 | 125 | 1.45/393 | 0.867 | 1.300 | 50 | 200-1000 | 250 | 2.5 | 800 | 125-500 | 60 | 0.15 |
T161-160 | 300-1800 | 160(87) | 251 | 4.0 | 125 | 1.70/502 | 1.05 | 1.36 | 15 | 20-1000 | 200 | 2.5 | 125 | 250 | 80 | 0.15 |
T161-200 | 300-1600 | 200(87) | 314 | 5.0 | 125 | 1.60/628 | 1.00 | 1.05 | 15 | 20-1000 | 200 | 2.5 | 160 | 250 | 125 | 0.13 |
Power Thyristors T261, T361 (160A)
Thyristors T261, T361 | |||||||||
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Series | Price | Voltage VDRM, VRRM |
Average forward current IT(AV) (TC, ºC) |
Voltage code VRRM / 100 |
Weight | Package type | Heatsink | Data sheet | |
T261-160 | on request | 100 - 1800V | 160A (92ºC) 186A (85ºC) |
1 - 18 | 240 g | ST6 | O171, O271, O371, O471, OM101 | ![]() |
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T361-160 | on request | 2400 - 2600V | 160A (80ºC) | 24 - 26 | 240 g | ST6 | O171, O271, O371, O471, OM101 | ![]() |
Detailed specifications of Power Thyristors T261, T361
Series | VDRM VRRM |
IT(AV) (TC) |
ITRMS | ITSM | Tjmax | VTM/ ITM |
VT(TO) | rT | IDRM IRRM |
(dVD/dt)cr | IGT | VGT | (diT/dt)cr | tq | i2·t | Rth(j-c) |
V | A(°C) | A | kA | °C | V/A | V | mOhm | mA | V/µs | mA | V | A/µs | µs | kA2·s | °C/W | |
T261-160 | 100-1800 | 160(92) 186(85) |
251 | 4.5 | 125 | 1.55/502 | 0.850 | 1.278 | 50 | 200-1000 | 250 | 2.5 | 800 | 125-500 | 80 | 0.150 |
T361-160 | 2400-2600 | 160(80) | 251 | 3.5 | 125 | 2.00/502 | 1.415 | 1.290 | 20 | 500-1000 | 250 | 2.5 | 125 | 250 | 61 | 0.145 |
Power Thyristors T171 (200A – 320A)
Thyristors T171 | |||||||||
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Series | Price | Voltage VDRM, VRRM |
Average forward current IT(AV) (TC, ºC) |
Voltage code VRRM / 100 |
Weight | Package type | Heatsink | Data sheet | |
T171-200 | $29.99 | 100 - 1800V | 200A (102ºC) 310A (85ºC) |
1 - 18 | 440 g | ST7 | O181, O281, OM105 | ![]() |
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T171-250 | $29.99 | 100 - 1800V | 250A (94ºC) 307A (85ºC) |
1 - 18 | 440 g | ST7 | O181, O281, OM105 | ![]() |
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T171-320 | $29.99 | 300 - 1800V | 320A (87ºC) | 3 - 18 | 440 g | ST7 | O181, O281, OM105 | ![]() |
Detailed specifications of Power Thyristors T171
Series | VDRM VRRM |
IT(AV) (TC) |
ITRMS | ITSM | Tjmax | VTM/ ITM |
VT(TO) | rT | IDRM IRRM |
(dVD/dt)cr | IGT | VGT | (diT/dt)cr | tq | i2·t | Rth(j-c) |
V | A(°C) | A | kA | °C | V/A | V | mOhm | mA | V/µs | mA | V | A/µs | µs | kA2·s | °C/W | |
T171-200 | 100-1800 | 200(90) 310(85) |
314 | 6.0 | 125 | 1.45/628 | 1.027 | 0.641 | 70 | 200-1000 | 250 | 2.5 | 1000 | 125-500 | 170 | 0.085 |
T171-250 | 100-1800 | 250(94) 310(85) |
393 | 6.5 | 125 | 1.55/785 | 1.036 | 0.653 | 70 | 200-1000 | 250 | 2.5 | 1000 | 125-500 | 200 | 0.085 |
T171-320 | 300-1800 | 320(87) | 502 | 8.5 | 125 | 1.60/1004 | 1.050 | 0.530 | 30 | 20-1000 | 200 | 2.5 | 125 | 250 | 361 | 0.085 |
Power Thyristors T271 (250A – 400A)
Thyristors T271 | |||||||||
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Series | Price | Voltage VDRM, VRRM |
Average forward current IT(AV) (TC, ºC) |
Voltage code VRRM / 100 |
Weight | Package type | Heatsink | Data sheet | |
T271-250 | on request | 100 - 800V | 250A (123ºC) 409A (100ºC) |
1 - 8 | 440 g | ST7 (T.SB1) | O181, O281, OM105 | ![]() |
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T271-320 | on request | 100 - 800V | 320A (116ºC) 429A (100ºC) |
1 - 8 | 440 g | ST7 (T.SB1) | O181, O281, OM105 | ![]() |
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T271-400 | on request | 100 - 800V | 400A (105ºC) | 1 - 8 | 440 g | ST7 | O181, O281, OM105 | – |
Detailed specifications of Power Thyristors T271
Series | VDRM VRRM |
IT(AV) (TC) |
ITRMS | ITSM | Tjmax | VTM/ ITM |
VT(TO) | rT | IDRM IRRM |
(dVD/dt)cr | IGT | VGT | (diT/dt)cr | tq | i2·t | Rth(j-c) |
V | A(°C) | A | kA | °C | V/A | V | mOhm | mA | V/µs | mA | V | A/µs | µs | kA2·s | °C/W | |
T271-250 | 100-800 | 250(123) 409(100) |
393 | 10.0 | 150 | 1.35/785 | 0.906 | 0.531 | 70 | 200-1000 | 250 | 2.5 | 800 | 125-500 | 450 | 0.085 |
T271-320 | 100-800 | 320(116) 429(100) |
502 | 10.5 | 150 | 1.35/1005 | 0.871 | 0.472 | 70 | 200-1000 | 250 | 2.5 | 800 | 125-500 | 500 | 0.085 |
T271-400 | 100-800 | 400(105) | 627 | 11.5 | 150 | - | 0.800 | 0.450 | 30 | 200-1000 | 250 | 2.5 | 320 | 160 | - | 0.090 |
Power Thyristors T371 (200A – 320A)
Thyristors T371 | |||||||||
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Series | Price | Voltage VDRM, VRRM |
Average forward current IT(AV) (TC, ºC) |
Voltage code VRRM / 100 |
Weight | Package type | Heatsink | Data sheet | |
T371-200 | on request | 100 - 1800V | 200A (102ºC) 310A (85ºC) |
1 - 18 | 470 g | T.SB2 | O181, O281, OM105 | ![]() |
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T371-250 | on request | 2200 - 2600V | 250A (94ºC) | 22 - 26 | 440 g | ST7 (T.SB2) | O181, O281, OM105 | ![]() |
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T371-320 | on request | 2000 - 2200V | 320A (82ºC) | 20 - 22 | 440 g | ST7 (T.SB2) | O181, O281, OM105 | ![]() |
Detailed specifications of Power Thyristors T371
Series | VDRM VRRM |
IT(AV) (TC) |
ITRMS | ITSM | Tjmax | VTM/ ITM |
VT(TO) | rT | IDRM IRRM |
(dVD/dt)cr | IGT | VGT | (diT/dt)cr | tq | i2·t | Rth(j-c) |
V | A(°C) | A | kA | °C | V/A | V | mOhm | mA | V/µs | mA | V | A/µs | µs | kA2·s | °C/W | |
T371-200 | 100-1800 | 200(102) 310(85) |
314 | 6.0 | 125 | 1.45/628 | 1.027 | 0.641 | 70 | 200-1000 | 250 | 2.5 | 1000 | 125-500 | 170 | 0.085 |
T371-250 | 2200-2600 | 250(94) | 392 | 7.0 | 125 | 1.54/785 | 0.930 | 0.730 | 30 | 200-1000 | 200 | 2.5 | 250 | 250 | 180 | 0.090 |
T371-320 | 2000-2200 | 320(82) | 502 | 8.0 | 125 | 1.67/1004 | 1.050 | 0.680 | 30 | 200-1000 | 200 | 2.5 | 320 | 200 | 320 | 0.085 |
Power Thyristors T471 (200A – 320A)
Thyristors T471 | |||||||||
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Series | Price | Voltage VDRM, VRRM |
Average forward current IT(AV) (TC, ºC) |
Voltage code VRRM / 100 |
Weight | Package type | Heatsink | Data sheet | |
T471-200 | on request | 4000 - 4400V | 200A (80ºC) | 40 - 44 | 440 g | ST7 | O181, O281, OM105 | ![]() |
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T471-250 | on request | 100 - 1800V | 250A (94ºC) 307A (85ºC) |
1 - 18 | 440 g | ST7 (T.SB2) | O181, O281, OM105 | ![]() |
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T471-320 | on request | 100 - 1800V | 320A (84ºC) | 1 - 18 | 440 g | ST7 (T.SB2) | O181, O281, OM105 | ![]() |
Detailed specifications of Power Thyristors T471
Series | VDRM VRRM |
IT(AV) (TC) |
ITRMS | ITSM | Tjmax | VTM/ ITM |
VT(TO) | rT | IDRM IRRM |
(dVD/dt)cr | IGT | VGT | (diT/dt)cr | tq | i2·t | Rth(j-c) |
V | A(°C) | A | kA | °C | V/A | V | mOhm | mA | V/µs | mA | V | A/µs | µs | kA2·s | °C/W | |
T471-200 | 4000-4400 | 200(80) | 214 | 4.0 | 125 | 2.46/628 | 1.850 | 1.240 | 50 | 500-1000 | 200 | 2.5 | 200 | 320-400 | 80 | 0.090 |
T471-250 | 100-1800 | 250(94) 307(85) |
393 | 6.5 | 125 | 1.55/785 | 1.036 | 0.653 | 70 | 200-1000 | 250 | 2.5 | 1000 | 125-500 | 210 | 0.085 |
T471-320 | 100-1800 | 320(84) | 502 | 7.0 | 125 | 1.60/1005 | 1.006 | 0.612 | 70 | 200-1000 | 250 | 2.5 | 1000 | 125-500 | 230 | 0.085 |
Part Numbering Guide for High Power Stud Thyristors:
T | 161 | – | 200 | – | 16 | 4 | 2 | UHL2 |
T | – | Thyristor low frequency. | ||||||||||||||||||||||||||||||||||||
161 | – | Construction (stud), series. | ||||||||||||||||||||||||||||||||||||
200 | – | Average current in open state IT(AV), Amp. | ||||||||||||||||||||||||||||||||||||
16 | – | Voltage class VRRM / 100 (Nominal voltage – 1600 V). | ||||||||||||||||||||||||||||||||||||
4 | – | Group of the critical rate of rise of off-state voltage (dVD/dt)crit:
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2 | – | Group of turn-off time tq:
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UHL2 | – | Climatic version and placement category: UHL2 - for moderate and cold climate. |
High Power Semiconductors by AS ENERGI
Our company is engaged in the manufacturer and sale of power semiconductors (power diodes, thyristors, triacs, power modules). You can buy thyristors from us in any volumes, and when ordering large lots, the price will be lower.
We have earned the trust of customers and cooperate with companies from neighboring countries.
To purchase High Power Diodes, Thyristors send an email request to:
office@asenergi.com
And we will provide you a commercial offer for delivery.
Installation recommendations for power stud mount thyristors:

The reliability of heat transfer and electrical contact between the mating surfaces of the thyristor and the cooler over the entire temperature range is ensured by appropriate torque.
Before assembly you should perform visual inspection (1) contact surfaces for mechanical damages and wipe (2), soaked with alcohol (toluene, gasoline, acetone).
To improve the parameters of heat transfer it is recommended to lubricate (3) a thin layer of silicone thermal conductive paste before the assembly, which is not a mandatory condition for installation.
After installation, the fasteners (nuts and washers) must be additionally secured against corrosion.
Tips and recommendations for power thyristors:
The power thyristors should not be operated for long periods of time at their limit load for all parameters. In this case, the safety factor is determined by the required degree of reliability of the device.
Replace a failed power thyristor with a thyristor that matches the parameters of the one being replaced.
Supercooling must be provided when operating in an environment with an elevated ambient temperature.
Periodic cleaning of power thyristors and coolers to remove dust and contaminants is recommended to ensure proper heat dissipation.
Inductive current dividers (often twisted toroidal wire) should be used to equalize currents between power thyristors connected in parallel. The most popular connection methods are closed circuit, common coil circuit, or power thyristor. The efficiency of current dividers in this case is determined by the cross section of the magnetic wire.
Prevention of voltage unbalance when power thyristors are connected in series is achieved by using shunt resistors connected in parallel with each thyristor. Voltage equalization in transient conditions is provided by connecting capacitors in parallel to each thyristor.

It is strictly forbidden to touch power thyristors under high voltage during operation.
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