Phase Control Thyristors Vishay Replacement

Power phase control thyristors, also known as Thyristor SCR (Silicon Controlled Rectifier), in disc design are press pack type general-purpose thyristors, regulating and converting DC and AC currents up to 2310A in circuits with voltages to 2400V (depends on the thyristor type).

Thyristors ASTD AS ENERGITM are a replacement, analog, alternative for presspacks electrical triggered thyristors Vishay Semiconductors.

"Air-cooled heatsinks O series for disc devices", "Air heatsink SF series", "Water heatsink SS series" for thyristor cooling are also available to order.

Part numbering guide for phase control thyristors

youtubeVideo: Reviews of high power disc thyristors

icon AS ENERGITM Semiconductors Manufacturing Reference

Features: designed for high power industrial and power transmission applications; optimized for low on-state voltage drop; matched Qrr and VT values available for series and / or parallel connections.

The thyristor has an industry standard ceramic housing making it easy to integrate the device into existing equipment. This thyristor has a disc housing with pressure contacts. The polarity of the thyristor is determined by the icon on the case. The technical specifications, part numbering guide, datashets for thyristors are listed below.

Thyristors AS ENERGITM 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 15000 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 technical passport and certificate of conformity.

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The final price of phase control thyristors depends on the voltage class, quantity, delivery terms, manufacturer, country of origin and form of payment.

General specifications of Vishay Phase Control Discrete Thyristors and Replacements

I2t VT(TO) rT Tvj max Rth(j-c)
W Package,
A (ºC) V A kA2·s V mΩ ºC ºC/W g mm PDF
VS-ST180C04C1 350 (55) 400 5000 125 1.14 1.14 125 0.015 50 A-PUK
VS-ST180C08C1 800 ASTD180C08C1
VS-ST180C12C1 1200 ASTD180C12C1
VS-ST180C16C1 1600 ASTD180C16C1
VS-ST180C18C1 1800 ASTD180C18C1
VS-ST180C20C1 2000 ASTD180C20C1
VS-ST230C04C1 410 (55) 400 5700 163 0.98 0.81 125 0.017 50 A-PUK
VS-ST230C08C1 800 ASTD230C08C1
VS-ST230C12C1 1200 ASTD230C12C1
VS-ST230C14C1 1400 ASTD230C14C1
VS-ST230C16C1 1600 ASTD230C16C1
VS-ST230C18C1 1800 ASTD230C18C1
VS-ST230C20C1 2000 ASTD230C20C1
VS-ST280C04C1 500 (55) 400 7850 260 0.88 0.47 125 0.017 50 A-PUK
VS-ST280C06C1 600 ASTD230C06C1
VS-ST280CH04C1 500 (80) 400 7200 260 0.88 0.47 125 0.017 50 A-PUK
VS-ST280CH06C1 600 ASTD280CH06C1
VS-ST300C04C1 650 (55) 400 8000 320 0.98 0.73 125 0.011 83 E-PUK
VS-ST300C08C1 800 ASTD300C08C1
VS-ST300C12C1 1200 ASTD300C12C1
VS-ST300C16C1 1600 ASTD300C16C1
VS-ST300C18C1 1800 ASTD300C18C1
VS-ST300C20C1 2000 ASTD300C20C1
VS-ST300C04L1 560 (55) 400 8000 320 0.98 0.73 125 0.010 250 B-PUK
VS-ST300C08L1 800 ASTD300C08L1
VS-ST300C12L1 1200 ASTD300C12L1
VS-ST300C16L1 1600 ASTD300C16L1
VS-ST300C18L1 1800 ASTD300C18L1
VS-ST300C20L1 2000 ASTD300C20L1
VS-ST330C04C1 720 (55) 400 9000 405 0.92 0.57 125 0.011 83 E-PUK
VS-ST330C08C1 800 ASTD330C08C1
VS-ST330C12C1 1200 ASTD330C12C1
VS-ST330C14C1 1400 ASTD330C14C1
VS-ST330C16C1 1600 ASTD330C16C1
VS-ST330C04L1 650 (55) 400 9000 405 0.93 0.57 125 0.010 250 B-PUK
VS-ST330C08L1 800 ASTD330C08L1
VS-ST330C12L1 1200 ASTD330C12L1
VS-ST330C14L1 1400 ASTD330C14L1
VS-ST330C16L1 1600 ASTD330C16L1
VS-ST380C04C1 960 (55) 400 15000 1130 0.88 0.24 125 0.011 83 E-PUK
VS-ST380C06C1 600 ASTD380C06C1
VS-ST380CH04C1 960 (55) 400 12500 782 0.88 0.24 125 0.011 83 E-PUK
VS-ST380CH06C1 600 ASTD380CH06C1
VS-ST650C20L1 790 (55) 2000 10100 510 1.13 0.35 125 0.009 255 B-PUK
VS-ST650C22L1 2200 ASTD650C22L1
VS-ST650C24L1 2400 ASTD650C24L1
VS-ST700C12L1 910 (55) 1200 15700 1232 1.13 0.35 125 0.009 255 B-PUK
VS-ST700C16L1 1600 ASTD700C16L1
VS-ST700C18L1 1800 ASTD700C18L1
VS-ST700C20CL1 2000 ASTD700C20CL1
VS-ST730C08L1 990 (55) 800 17800 1591 1.12 0.27 125 0.009 255 B-PUK
VS-ST730C12L1 1200 ASTD730C12L1
VS-ST730C14L1 1400 ASTD730C14L1
VS-ST730C16L1 1600 ASTD730C16L1
VS-ST730C18L1 1800 ASTD730C18L1
VS-ST730C20L1 2000 ASTD730C20L1
VS-ST780C04L1 1350 (55) 400 24400 2986 0.90 0.13 125 0.009 255 B-PUK
VS-ST780C06L1 600 ASTD780C06L1
VS-ST1000C12K1 1473 (55) 1200 20000 2000 1.024 0.265 125 0.003 425 K-PUK
VS-ST1000C14K1 1400 ASTD1000C14K1
VS-ST1000C16K1 1600 ASTD1000C16K1
VS-ST1000C18K1 1800 ASTD1000C18K1
VS-ST1000C20K1 2000 ASTD1000C20K1
VS-ST1000C22K1 2200 ASTD1000C22K1
VS-ST1000C24K1 2400 ASTD1000C24K1
VS-ST1200C12K1 1650 (55) 1200 30500 4651 1.01 0.19 125 0.003 425 K-PUK
VS-ST1200C14K1 1400 ASTD1200C14K1
VS-ST1200C16K1 1600 ASTD1200C16K1
VS-ST1200C18K1 1800 ASTD1200C18K1
VS-ST1200C20K1 2000 ASTD1200C20K1
VS-ST1230C08K1 1745 (55) 800 33500 5615 1.02 0.16 125 0.003 425 K-PUK
VS-ST1230C12K1 1200 ASTD1230C12K1
VS-ST1230C14K1 1400 ASTD1230C14K1
VS-ST1230C16K1 1600 ASTD1230C16K1
VS-ST1280C04K1 2310 (55) 400 42500 9027 0.90 0.068 125 0.003 425 K-PUK
VS-ST1280C06K1 600 ASTD1280C06K1

Part Numbering Guide for Phase Control Thyristors:

AS TD 18 0 C 04 C 1
TD Product group: Thyristor Disc.
18 Essential part number.
0 Converter grade.
C Phase control device.
04 Voltage class VRRM / 100.
C Housing (package) type: A-PUK (TO-200AB).
1 Fast-on terminals (gate and auxiliary cathode unsoldered leads).

High Power Semiconductors AS ENERGITM

Our company is engaged in the manufacturer and sale of wide range of power semiconductors (power thyristors, modules, rectifier diodes, avalanche, rotor and welding diodes, triacs etc.) currents up to 15000A and voltages to 9000V, and air and water heatsinks to them.
You can buy semiconductor devices in any volumes, and when ordering large lots, the price will be lower. We have earned the trust of customers and supply products all over the world.

For questions regarding the acquisition of Power Thyristors, Diodes, Modules send an email request to:

[email protected]

And we will provide you a commercial offer for delivery.
For a large number, we will provide an individual price!!!

We are open to manufacture products at our production facilities
according to your requests and technical task.

Photo Gallery

The photo gallery shows many different semiconductor devices, semiconductor chips and SCRs produced by AS ENERGITM, examples of test reports.

Photo of High Power Thyristors:

Installation recommendations for power thyristors:

Assembling disc thyristor with a heatsink

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 (clamping force).

Before assembly you should perform visual inspection (1) contact surfaces for mechanical damages and wipe (2), soaked with alcohol (toluene, gasoline, acetone).

After inspection, fix the current contacts (leads), install a pin to fix the alignment of the structure.

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.

Install the thyristor (3), the second part of the cooler, the fiberglass insulator and the thrust washer.

To thread the traverse (4) and evenly tighten the nuts. Make sure no misalignment and evenness of the contact surfaces.

When the parts are sufficiently clamped but moveable, we recommend placing the cooler on a flat surface and checking the tolerance for parallelism of the overall adjacent plane of the surfaces (5).

Clamp each nut in turn (about a quarter turn) to the stop (6). The amount of deflection of the traverse determines whether the achieved clamping force corresponds to the required one.

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.

icon Why choose AS ENERGITM

  • Own production facilities, including semiconductor silicon chips production
  • European brand - 100% quality, favorable price, short production terms
  • Over 20 years of experience in the semiconductor industry
  • Clients from more than 50 countries trust us
  • 20000 items in the product line for currents from 10A to 15000A, voltages from 100V to 9000V
  • We produce analogues of other manufacturers' products
  • Guaranteed certified quality, warranty period of operation - 2 years


Quality Warranty

Our products are certified and correspond to international standards.
Our company provides a quality guarantee for products of 2 years.
We provide certificates of conformity, reliability reports, data sheets and technical passports at the request of the customer.


Each product is tested for the main parameters, and Test reports of the parameters for each product are provided.

Test Report

Geography of partnership

AS ENERGITM company manufactures and supplies power semiconductors to more than 50 countries around the world.


Logistics and Delivery

We deliver our products all over the world with the services of logistics companies: DHL, TNT, UPS, EMS, Fedex, Aramex.
Products can be delivered by any means of transport: air, sea, rail and road.


AS ENERGITM Semiconductors Manufacturing

Our products range includes rectifier diodes, phase control thyristors in disc and stud design, avalanche diodes and thyristors, fast switching, high frequency thyristors, fast recovery, welding and rotor diodes, triacs, bridge rectifiers, power modules (thyristor, diode, thyristor-diode, IGBT), and air and water heatsinks to them.

Power diodes and thyristors are produced for currents from 10A to 15000A, voltage range from 100V to 9000V.
Power diode and thyristor modules are produced from 25A and up to 1250A, voltage range 400V - 4400V.
The range of power semiconductors also includes equivalent, replacement, analogue and alternative semiconductor devices of global manufacturers.

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Tags: Phase Control Thyristor, SCR Stud Thyristor, thyristor, power semiconductor, Vishay replacement, phase control thyristor price, scr thyristor datasheet, thyristor switching circuits, certificate, manufacturing, thyristors factory made, technical specification of power thyristor


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