Medium Voltage Thyristor K1785HA420 IXYS Westcode Replacement

IXYS Westcode Part Number K1785HA420
Average on-state current, IT(AV)M (TC) 1785A (55ºC)
Voltage, VDRM/VRRM 4200 V
Package, Dimensions ØDxØdxH Package W79
100x66x26 mm
Datasheet -
Replacement AS ENERGITM ATDK1785HA420
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Medium voltage thyristor ATDK1785HA420 AS ENERGITM is a replacement, analogue, alternative and equivalent semiconductor device for medium voltage SCR thyristor K1785HA420 IXYS UK Westcode, Littelfuse.

Average forward on-state current ITAV1785 ampere, repetitive peak forward and reverse voltage VDRM/VRRM4200V.

Features: Medium Voltage Thyristors are optimised for medium voltage applications and series operation. As voltages increase, so do switching losses and turn-off time to a point where they become significant in line frequency applications. Distributed gate architecture ensures excellent switching performance over a wide range of voltage, current and di/dt.

Thyristor lifetime is also engineered to achieve an optimum balance between conduction losses, commutation losses and turn-off time to give maximum power handling from line frequency to 400Hz. This also gives significant benefits when series or parallel connection of devices is required.

Medium voltage thyristors are available from 2800V up to 6500V and current from 450A up to 4215A making them particularly suitable for high power converters such as medium voltage DC drives, medium voltage soft starts and utility applications such as HVDC, static VAR compensators, excitation and transfer switches.

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

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 10 to 15000 A, high resistance to thermal and electric cycling, natural or forced air cooling.

The technical specifications and parameters of K1785HA420 and replacement ATDK1785HA420, datasheet PDF, outline drawing and dimensions 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.

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

General specifications of Medium Voltage Thyristor IXYS WESTCODE and Replacements:

Thyristors specifications K1785HA420
Average on-state current (Case temperature) IT(AV)M (TC) 1785 A (55ºC)
Repetitive peak off-state voltage; repetitive peak reverse voltage VDRM/VRRM 4200 V
Surge on-state current ITSM 26600 A
Safety factor I2t 3.53x106 A2·s
Turn-off time tq 1050-1350 µs
Recovered charge Qrr 5150 µC
Peak on-state current ITM 1500 A
Critical rate of rise of on-state current -di/dt 10 A/µs
Threshold voltage VT0 1.373 V
On-state slope resistance rT 0.536 mΩ
Temperature of p-n junction Tvj max 125 ºC
Thermal resistance, junction to case Rth(j-c) 0.0105 K/W
Clamping force Fm 32 - 40 kN
Weight W 0.9 kg
Package (Housing) type W79
Dimensions ØDxØdxH 100x66x26 mm
Replacement AS ENERGITM type ATDK1785HA420
Datasheet PDF -

Part Numbering Guide for Medium Voltage Thyristors:

A TDK 1785 HA 42 0
A brand AS ENERGITM
TDK Product group: Medium Voltage Thyristor (Disc type).
1785 Average on-state current IT(AV), Amp.
HA Housing (package) type.
42 Voltage code VRRM / 100.
0 Fixed turn-off time code.

Dimensions of Medium Voltage Thyristor K1785HA420 and Replacement ATDK1785HA420:

dimensions

Package W79


Polarity (anode, cathode, gate) of power disc thyristors:

Thyristor polarity Disc thyristors

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.


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.

Air and water heat sinks for thyristor cooling are also available to order.

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


Photo of Phase Control Thyristor SCR:


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.

Certificates

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.

Geography

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.

Logistics

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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