High Frequency Thyristor KA 300A – 2500A

Ultra Fast High Frequency Thyristor KA series AS ENERGITM in disc design is a press pack type ultra fast turn-off high frequency semiconductor device. High frequency thyristors meet requirements, such as increased di/dt resistance, low switching losses, short turn-on and turn-off time. Regulating and converting DC and AC currents to 1200A at frequency range is up to 20kHz in circuits with voltages to 2400V (depending on series).

The anode and cathode of the high frequency thyristor (polarity) are determined by the symbol on the case. A special feature of high frequency thyristors is their highly branched control electrode that ensures short propagation time of the onstate.

For cooling during the operation of power thyristors they are mounted with coolers (heat sinks). Depending on the amount of heat generated and the working conditions of the semiconductors, either natural air flow cooling or forced cooling can be used. When assembling, the necessary clamping force Fm specific for each type of thyristor package (indicated in the parameter table) must be provided.

High frequency thyristors can be manufactured for use in temperate, cold and tropical climates. Fast thyristors of the disc type KA are used in various power converters (e.g. melting furnaces) where fast switching and control of currents is necessary.

Series (ratings) thyristors are: KA300A, KA400A, KA500A, KA600A, KA700A, KA800A, KA900A, KA1000A, KA1100A, KA1200A, KA1400A, KA1500A, KA1700A, KA2000A, KA2500A.

Specifications and parameters, datasheets PDF, dimensions, drawings, case diagrams thyristors, recommended coolers are listed below.

Our company provides a quality guarantee for fast high frquency thyristors KA 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 for high frequency disc thyristors KA depends on the class, quantity, delivery terms, manufacturer, country of origin and form of payment.

For questions regarding the acquisition of High Power Thyristors, Diodes, 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.

General specifications of utra fast thyristors KA

Series IT(AV)
ITSM I2t dv/dt di/dt tq Tvj max Rth(j-c) Fm
W Outline Dimensions
A V kA kA2·s V/µs A/µs µs ºC ºC/W kN kg mm PDF
KA300-(8...14) 300 800-1400 5.8 168 200 1500 12-24 125 0.08 5 0.10 A-1 42x25x15 PDF
KA400-(8...14) 400 800-1400 5.68 168 200 1500 12-24 125 0.08 5 0.10 A-1 42x25x15 PDF
KA500-(8...12) 500 800-1200 5.4 146 200 1500 10-20 125 0.08 5 0.10 A-1 42x25x15 PDF
KA600-(8...14) 600 800-1400 9.3 432 200 1500 12-24 125 0.045 15 0.26 A-2 58x34x26 PDF
KA700-(8...12) 700 800-1200 8.9 396 200 1500 10-20 125 0.045 15 0.26 A-2 58x34x26 PDF
KA800-(6...9) 800 600-900 8.0 320 200 1500 5-7 125 0.045 15 0.26 A-2 58x34x26 PDF
KA900-(12...16) 900 1200-1600 10.0 500 200 1500 18-36 125 0.041 18 0.30 A-3 66x42x26 PDF
KA1000-(8...14) 1000 800-1400 12.0 720 200 1500 15-28 125 0.035 20 0.37 A-4 69x45x26 PDF
KA1000-(12...16) 1000 1200-1600 11.0 605 200 1500 18-36 125 0.035 20 0.37 A-4 69x45x26 PDF
KA1100-(8...18) 1100 800-1200 11.0 605 200 1500 10-20 125 0.035 20 0.37 A-4 69x45x26 PDF
KA1200-(6...9) 1200 600-900 9.6 461 200 1500 6-15 125 0.035 20 0.37 A-4 69x45x26 PDF
KA1200-(8...14) 1200 800-1400 16.3 1328 200 1500 15-28 125 0.020 22 0.47 A-5 74x47x26 PDF
KA1400-(8...12) 1400 800-1200 15.0 1125 200 1500 10-20 125 0.020 22 0.47 A-5 74x47x26 PDF
KA1500-(8...14) 1500 800-1400 18.0 1620 200 1500 15-28 125 0.018 30 0.60 A-6 85x55x26 PDF
KA1700-(8...12) 1700 800-1200 17.0 1445 200 1500 10-20 125 0.018 30 0.60 A-6 85x55x26 PDF
KA2000-(10...12) 2000 1000-1200 23.0 2645 1000 1200 8-15 125 0.0125 45 1.0 A-8 100x63x26 PDF
KA2500-(10...12) 2500 1000-1200 23.0 2645 1000 1200 8-15 125 0.01 56 1.44 A-9 110x73x26 PDF

Part numbering guide for fast high frequency thyristors KA:

KA 2500A 1200V
KA Thyristor type: Ultra Fast High Frequency Thyristor, brand AS ENERGITM
2500A Average forward current in open state IT(AV), A.
1200V Nominal voltage, V.

Types of KA series thyristor packages, dimensions, drawing

High Frequency Thyristor dimensions
High Frequency Thyristor dimensions
High Frequency Thyristor dimensions
High Frequency Thyristor dimensions
KA300, KA400
KA600, KA700
KA900 KA1000, KA1100
High Frequency Thyristor dimensions
High Frequency Thyristor dimensions
High Frequency Thyristor dimensions
High Frequency Thyristor dimensions
KA1200, KA1400 KA1500, KA1700 KA2000 KA2500

High Power Semiconductors by AS ENERGI

Our company is engaged in the manufacturer and sale of power semiconductors (power thyristors, diodes, 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 supply products all over the world.

For questions regarding the acquisition of High Power Thyristors, Diodes, 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!!!

Heat sinks for power disc thyristors:

Heat sinks (radiators) are used for single- and double-sided cooling of power semiconductor devices in disc design.

Heat sinks of coolers are made of aluminum radiator profiles and do not require additional protective coating when used in various climatic conditions.

See for more information about heatsinks: "Air-cooled heatsinks O series for disc devices", "Air heatsink SF series", "Water heatsink SS series".

Photo of disc power thyristors:

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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