Rectifier Diode D373-1250 (9000 – 10000V)

Average forward current, IFAV 1250A
Voltage, VRRM 9000–10000V
Voltage code, VRRM / 100 90 – 1
D373-1250 on request
Dimensions ØD×Ød×H
107x75x35 mm
Weight 1300 g
Datasheet Datasheet

Rectifier Diode D373-1250 AS ENERGITM is general purpose disc diode. This is a power p-n junction diode designed for converting DC and AC currents up to 1250A with frequency up to 500Hz in circuits with voltages up to 9000V – 100V (voltage class from 90 to 1). Diode dimensions ØDxØdxH – 107x75x35 mm (outer case diameter X contact surface diameter X case height), weight – 1300 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 1100A, 1150A, 1200A, 1250 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: .

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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 D373-1250:

Diode specifications D373-1250
Maximum allowable average forward current (Case temperature) IF(AV) (Tcase) 1403 A (85ºC)
Repetitive peak reverse voltage VRRM 9000-10000 V
RMS forward current IFRMS 2200 A
Surge non-repetitive current IFSM 23 kA
Safety factor I2t 2645 kA2·s
Peak forward voltage, max VFM 1.90 V
Peak current IFM 3900 A
On-state threshold voltage, max VF(TO) 1.50 V
On-state slope resistance, max rT 0.70 mΩ
Repetitive peak reverse currents, max IRRM 200 mA
Temperature of p-n junction, max Tvj max 140 ºC
Thermal resistance, junction to case, max Rth(j-c) 0.010 ºC/W
Clamping force Fm 45±5 kN
Weight, approx. W 1300 g
Package type, Dimensions ØDxØdxH PD74
107x75x35 mm
Recommended heatsinks Heatsinks O173, O273
Datasheet PDF PDF

Part Numbering Guide for Rectifier Diode D373-1250:

D 373 1250 1
D Diode, brand AS ENERGITM
373 Diode type (disc type).
1250 Average forvard current in open state IF(AV), Amp.
1 Voltage class VRRM / 100  (Nominal voltage – 100 V).

Polarity (anode, cathode) and dimensions of disc diode D373-1250:

Diode polarity Dimensions

Diode D373-1250 datasheet:

PDFDownload pdf datasheet for diodes D373-1250

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 cooperate with companies from neighboring countries.

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 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 coolers "Air-heatsink" and "Water-heatsink".

Photo of Power Rectifier Disc Type Diodes:

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