Rectifier Diode 1000A, type D343-1000 (3400V – 4400V)

Average forward current, IFAV 1000A
Voltage, VRRM 3400–4400V
Voltage code, VRRM / 100 34 – 44
D343-1000 on request
Dimensions ØD×Ød×H
60x37x20 mm
Weight 240 g
Datasheet Datasheet

Rectifier Diode D343-1000 AS ENERGITM is general purpose disc diode. This is a power p-n junction diode designed for converting DC and AC currents up to 1000A with frequency up to 500Hz in circuits with voltages up to 3400V – 4400V (voltage class from 34 to 44). Diode dimensions ØDxØdxH – 60x37x20 mm (outer case diameter X contact surface diameter X case height), weight – 240 g.

The anode and cathode of the diode (polarity) are determined by the symbol on the case. Diodes are in a industry-standard ceramic press pack disc (capsule, tablet) housing. This rectifier diode can be an alternative product, replacement, analog, equivalent for other types diodes 850A, 900A, 950A, 990A, 1000 amp in a disk type package.

For cooling during the operation of power semiconductor diodes 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 diode case (indicated in the parameter table) must be provided.

Semiconductor diodes disc type are used in power equipment – power and control units, power regulators, converters (e.g. melting furnaces), controllers where fast switching and control of currents is necessary.

Specifications and parameters, datasheets PDF, sample technical passport, dimensions, outline drawings, case diagrams diodes, recommended coolers are listed below.

Our company provides a quality guarantee for power rectifier diode of 2 years from the date of purchase. When supplying diodes, if necessary, we provide technical passport, certificate of conformity.

Diode ratings: D343-1000-34 (1000A 3400V), D343-1000-36 (1000A 3600V), D343-1000-38 (1000A 3800V), D343-1000-40 (1000A 4000V), D343-1000-42 (1000A 4200V), D343-1000-44 (1000A 4400V).

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The final price for rectifier disc diodes depends on the voltage class, quantity, delivery terms, manufacturer, country of origin and form of payment.

General specifications of rectifier diodes D343-1000:

Diode specifications D343-1000
Maximum allowable average forward current (Case temperature) IF(AV) (Tcase) 1210 A (85ºC)
Repetitive peak reverse voltage VRRM 3400-4400 V
RMS forward current IFRMS 1890 A
Surge non-repetitive current IFSM 13.0 kA
Safety factor I2t 845 kA2·s
Peak forward voltage, max VFM 2.20 V
Peak current IFM 3140 A
On-state threshold voltage, max VF(TO) 0.90 V
On-state slope resistance, max rT 0.46 mΩ
Repetitive peak reverse currents, max IRRM 70 mA
Temperature of p-n junction, max Tvj max 160 ºC
Thermal resistance, junction to case, max Rth(j-c) 0.027 ºC/W
Clamping force Fm 15 kN
Weight, approx. W 240 g
Package type, Dimensions ØDxØdxH PD42
60x37x20 mm
Recommended heatsinks Heatsinks O143, O243, O343, OM103, OM104
Datasheet PDF PDF

Part Numbering Guide for Rectifier Diode D343-1000:

D 343 1000 44
D Diode, brand AS ENERGITM
343 Diode type (disc type).
1000 Average forward current in open state IF(AV), Amp.
44 Voltage class VRRM / 100  (Nominal voltage – 4400 V).

Polarity (anode, cathode) and dimensions of disc diode D343-1000:

Diode polarity Dimensions

Diode D343-1000 datasheet:

PDFDownload pdf datasheet for diodes D343-1000

Technical Passport for Rectifier Diodes (sample):

When supplying diodes, if necessary, we provide technical passport and certificate of conformity.

  • Technical Passport
  • Technical Passport
  • Technical Passport

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, rotor and welding diodes, triacs etc.) currents up to 15000A and voltages to 9000V, and air and water heatsinks to them. You can buy semiconductors 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 diodes:

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 Power Rectifier Disc Type Diodes:

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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