Diode Module Semikron SKKD 81/20 H4 and Replacement
Module Semikron SKKD 81/20 H4 is a dual diode rectifier module in a standard housing SEMIPACK 1.
Rectifier Diode Module AMKD 81-20 H4 AS ENERGITM is a replacement, analogue, alternative and equivalent semiconductor device for diode module SKKD 81/20 H4 Semikron.
The diode modules are characterized by high electrical and thermal cycling capability, meaning high reliability and long lifetime in intensive operation modes. The diode modules are housed in a industry-standard housing making it easy to integrate the device into existing equipment.
The main (power) terminals are on the top of the case and are marked as 1, 2, 3 (common anode-cathode, cathode, anode).
Dual diode modules are used in various power equipment - power and control units, power regulators, AC regulators, DC motors control, AC motor soft starters, converters, controllers of blast furnaces or chemical processes, welding equipment, and as rectifiers for AC converters.
Modules are offered in several dual and single device topologies for almost all phase control or rectifier applications.
Our company provides a quality guarantee for thyristor / diode modules of 2 years from the date of purchase. When supplying thyristor / diode modules, if necessary, we provide technical passport and certificate of conformity.
The final price for thyristor / diode modules depends on the class, quantity, delivery terms, manufacturer, country of origin and form of payment.
General specifications of Rectifier Diode Module SKKD 81/20 H4 and Replacements:
|Diode module specifications||SKKD 81/20 H4|
|Maximum allowable average forward current (Case temperature)||IFAV (Tcase)||82 A (85ºC)
80 A (87ºC)
|Repetitive pulsed reverse voltage||VRRM||2000 V|
|Surge on-state current||IFSM||1750 A|
|Safety factor||I2t||15 kA2·s|
|Threshold voltage||V(TO)||0.85 V|
|On-state slope resistance||rT||1.8 mΩ|
|Junction temperature||Tvj max||125 ºC|
|Thermal resistance, junction to case||Rth(j-c)||0.40 ºC/W|
|Design (switches)||-||dual component|
|Type (circuit diagram)||-||diode-diode|
|Package, Dimensions, mm||L×B×H||SEMIPACK 1
|Replacement AS ENERGITM||type||AMKD 81-20 H4|
Part numbering guide for Rectifier Diode Modules AMKD:
|M||–||Semiconductor Type: Module.|
|KD||–||Topology of internal connection: Diode-Diode.|
|81||–||Rated current (ITAV), A.|
|20||–||Voltage class (VRRM/100).|
|H4||–||Option, where applicable, e.g H4 stands for Visol = 4800 V.
H1 stands for Visol = 3600 V.
Possible alternatives, replacements, analogue, equivalent products:
List of series of power diode modules with similar parameters and housing sizes.
|Series||IFAV (Tcase)||VRRM||Topology||Dimensions, mm||Package||Datasheet|
|SKKD 81/20 H4||82 A (85ºC)||2000 V||diode-diode||93x20x30||1|
|AMKD 81-20 H4||82 A (85ºC)||2000 V||diode-diode||93x20x30||1|
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 Modules, Diodes, 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.