High Frequency Thyristor KA300A 800V – 1400V

Average forward current, IT(AV) (TC, ºC) 300А (55ºC)
Voltage, VDRM/VRRM 800-1400 V
Voltage code, VRRM / 100 8 – 14
KA300-(8...14) on request
Dimensions ØDxØdxH 42x25x15 mm
Weight 0.10 kg
Datasheet PDF

Ultra Fast High Frequency Thyristor KA300-(8...14) AS ENERGITM in disc design is a press pack type ultra fast turn-off high frequency semiconductor device. This high frequency thyristor designed for converting and control DC and AC currents up to 300A with frequency up to 20kHz in circuits with voltages up to 800V – 1400V (voltage class from 8 to 14). Thyristor dimensions ØDxØdxH – 42x25x15 mm (outer case diameter X contact surface diameter X case height), weight – 100 g.

KA-series Fast High Frequency thyristors are devices with reduced tq, trr, Qrr values and with a higher value (diT/dt)cr (up to 2500 A/µs) designed to operate at high frequencies modes (up to 20kHz). A special feature of such thyristors is their highly branched control electrode that ensures short propagation time of the onstate. Fast thyristors are characterized with a very low turn-off time that sets them apart from the standard models. They are used in welding, induction heating and melting, electric transportation, AC drives, UPS, and other systems requiring short turn-on and turn-off times. The thyristors have an industry-standard ceramic sealed housing isolating the functional part and the semiconductor element from mechanical impacts and environment.

The anode and cathode of the thyristor (polarity) are determined by the symbol on the case. Fast thyristors are in a press pack disc (capsule, tablet) housing. This fast thyristor can be an alternative product, replacement, analog, equivalent for other types of fast thyristors 280A, 290A, 300 amp in a disk package.

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.

Thyristors can be manufactured for use in temperate, cold and tropical climates. 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.

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

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.

Fast thyristor ratings: KA300A 800V, KA300A 900V, KA300A 1000V, KA300A 1200V, KA300A 1400V.

Read more

The final price for disc fast high frequency thyristors depends on the voltage class, quantity, delivery terms, manufacturer, country of origin and form of payment.

For questions regarding the acquisition of Power Ultra Fast High Frequency Thyristors 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.

General specifications of ultra fast high frequency thyristors KA300-(8...14):

Thyristors specifications KA300-(8...14)
Maximum allowable average forward current (Case temperature) IT(AV)/(TC) 300 A (55ºC)
Repetitive pulsed closed state voltage; repetitive pulsed reverse voltage VDRM/VRRM 800-1400 V
Surge on-state current ITSM 5.8 kA
Safety factor I2t 168 kA2·s
Critical rate of rise of off-state voltage dv/dt 200 V/µs
Critical rate of rise of on-state current di/dt 1500 A/µs
Turn-off time tq 12-24 µs
Temperature of p-n junction Tvj max 125 ºC
Thermal resistance, junction to case Rth(j-c) 0.08 ºC/W
Clamping force Fm ±10% 5 kN
Weight W 0.10 kg
Dimensions ØDxØdxH 42x25x15
Datasheet PDF PDF

Part numbering guide for ultra fast thyristors KA300A 1400V:

KA 300A 1400V
KA Type: Fast High Frequency Thyristor, brand AS ENERGITM
300A Average forward on-state current IT(AV), A.
1400V Nominal voltage, V.

Polarity (anode, cathode, gate) and dimensions of disc thyristor KA300-(8...14):

Fast High Frequency Thyristor polarity High Frequency Thyristor dimensions

High Frequency Thyristors KA300-(8...14) datasheet:

PDFDownload datasheet for ultra fast thyristors KA300-(8...14)

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 semiconductor devices 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 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.

Heat sinks for disc fast 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 coolers: "Water Heatsink SS series", "Air Heatsink SF series", and also "Air-heatsink" and "Water-heatsink".

Photo of Fast High Frequency Thyristor SCR:

GİZEM GÖZÜN 26.01.2021 at 13:04
I'm Gizem, I'm a chemical engineer. I'm interested in making ceramic stuffs as a hobby. Would you please give some explanation about my questions below;
1) If I only mix SiO2 and Fe2O3 (3:1), can i get a suitable product without using other components?
2) Can i use water as fastener? or would you suggest me another fastener?
3) At which temperature should i mix them?
Thank you for your interest, Kind Regards
26.01.2021 at 14:43
Hello, Gizem. The mass of ceramic is produced by grinding and mixing with water of different components: clay, feldspar, sand, kaolin. The proportions of these materials are different percentages, depending on what and with what characteristics you need to get a ceramic mass.
Each manufacturer of ceramic mass has its own recipes and its own raw materials, which are available in its region.
There are also books on ceramics that specify the chemical composition and approximate recipes for ceramic masses.

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