alseryabFast Thyristor KK1800A 1600V – 2000V
| Average forward current, IT(AV) (TC, ºC) | 1800А (55ºC) |
| Voltage, VDRM/VRRM | 1600-2000 V |
| Voltage code, VRRM / 100 | 16 – 20 |
| KK1800-(16...20) | on request
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| Dimensions ØDxØdxH | 85x60x26 mm |
| Weight | 0.67 kg |
| Datasheet |  |
Fast Thyristor KK1800-(16...20) AS ENERGITM in disc design is a press pack type fast turn-off semiconductor device. This fast power thyristor designed for converting and control DC and AC currents up to 1800A with frequency up to 10kHz in circuits with voltages up to 1600V – 2000V (voltage class from 16 to 20). Thyristor dimensions ØDxØdxH – 85x60x26 mm (outer case diameter X contact surface diameter X case height), weight – 670 g.
KK-series Fast 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 higher frequencies modes (up to 10kHz). 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 1800 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 KK 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: KK1800A 1600V, KK1800A 1800V, KK1800A 2000V.
The final price for disc fast thyristors depends on the voltage class, quantity, delivery terms, manufacturer, country of origin and form of payment.
For questions regarding the acquisition of High Power Fast Thyristors send an email request to:
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 fast thyristors KK1800-(16...20):
| Thyristors specifications | KK1800-(16...20) | |
| Maximum allowable average forward current (Case temperature) | IT(AV)/(TC) | 1800 A (55ºC) |
| Repetitive pulsed closed state voltage; repetitive pulsed reverse voltage | VDRM/VRRM | 1600-2000 V |
| Surge on-state current | ITSM | 25.2 kA |
| Safety factor | I2t | 3200 kA2·s |
| Critical rate of rise of off-state voltage | dv/dt | 1000 V/µs |
| Critical rate of rise of on-state current | di/dt | 200 A/µs |
| Turn-off time | tq | 35 µs |
| Temperature of p-n junction | Tvj max | 125 ºC |
| Thermal resistance, junction to case | Rth(j-c) | 0.018 ºC/W |
| Clamping force | Fm ±10% | 40 kN |
| Weight | W | 0.67 kg |
| Dimensions | ØDxØdxH | 85x60x26 |
| Datasheet | |
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Part numbering guide for fast thyristors KK1800A 20V:
| KK | 1800A | – | 2000V |
| KK | – | Type: Fast thyristor,  AS ENERGITM |
| 1800A | – | Average forward on-state current IT(AV), A. |
| 2000V | – | Nominal voltage, V. |
Polarity (anode, cathode, gate) and dimensions of disc thyristor KK1800-(16...20):
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Thyristors KK1800-(16...20) datasheet:
Download datasheet for fast thyristors KK1800-(16...20)
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:
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 Thyristor SCR:
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