Standard Recovery Diodes Vishay Replacement

Power Rectifier Diodes, also known as Standard Recovery Diodes in disc design is a press pack type general-purpose diodes.

Features: optimised for line frequency; low on-state losses; high reverse voltage and high current handling capabilities.

Rectifier Diodes ASDD AS ENERGITM are a replacement, analog, alternative semiconductor devices for Standard Recovery Diodes Vishay Semiconductors.

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

Part numbering guide for rectifier diodes

youtubeVideo: Reviews of high power disc diodes

icon AS ENERGITM Semiconductors Manufacturing Reference

The standard recovery diodes converting DC and AC currents up to 3800A in circuits with voltages up to 4500V. Their main applications are rectifiers for large AC drives, aluminum smelting and other metal refining as well as trackside supply.

The diode has an industry standard ceramic housing making it easy to integrate the device into existing equipment. This diode has a disc housing with pressure contacts. The polarity of the diode (anode, cathode) is determined by the icon on the case. The technical specifications, part numbering guide, datashets for diodes are listed below.

Rectifier Diodes AS ENERGITM have the following features: low static and dynamic losses, high values of VRSM/VRRM, extensive experience of using the devices in various industries, range of voltages from 100 to 9000 V and amperages from 100 to 15000 A, high resistance to thermal and electric cycling.

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

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

General specifications of Standard Recovery Disc Diodes Vishay and Replacements

VRRM/VDRM IFSM I2t VF(TO) rT Tvj max Rth(j-c)
W Package,
A (ºC) V A kA2·s V mΩ ºC ºC/W g mm PDF
VS-SD300C25C 540 (55) 2500 6050 183 1.00 0.72 150 0.017 70 A-PUK
VS-SD300C28C 2800 ASDD300C28C
VS-SD300C30C 3000 ASDD300C30C
VS-SD300C32C 3200 ASDD300C32C
VS-SD300C04C 650 (55) 400 6050 183 1.00 0.72 180 0.017 70 A-PUK
VS-SD300C08C 800 ASDD300C08C
VS-SD300C12C 1200 ASDD300C12C
VS-SD300C16C 1600 ASDD300C16C
VS-SD300C20C 2000 ASDD300C20C
VS-SD700C30L 700 (55) 3000 7500 281 0.99 0.73 150 0.011 250 B-PUK
VS-SD700C36L 3600 ASDD700C36L
VS-SD700C40L 4000 ASDD700C40L
VS-SD700C45L 4500 ASDD700C45L
VS-SD400C04C 800 (55) 400 8250 340 0.83 0.53 190 0.018 70 A-PUK
VS-SD400C08C 800 ASDD400C08C
VS-SD400C12C 1200 ASDD400C12C
VS-SD400C16C 1600 ASDD400C16C
VS-SD400C20C 2000 ASDD400C20C
VS-SD400C24C 2400 ASDD400C24C
VS-SD1100C25L 910 (55) 2500 10500 551 0.88 0.38 150 0.011 250 B-PUK
VS-SD1100C28L 2800 ASDD1100C28L
VS-SD1100C28J 2800 ASDD1100C28J
VS-SD1100C30L 3000 ASDD1100C30L
VS-SD1100C32J 3200 ASDD1100C32J
VS-SD1100C32L 3200 ASDD1100C32L
VS-SD800C40L 1065 (55) 4000 12200 745 1.18 0.41 150 0.009 255 B-PUK
VS-SD800C45L 4500 ASDD800C45L
VS-SD1100C25C 1100 (55) 2500 10500 551 0.88 0.38 150 0.007 83 B-43
VS-SD1100C30C 3000 ASDD1100C30C
VS-SD1100C32C 3200 ASDD1100C32C
VS-SD1100C04L 1170 (55) 400 13000 846 0.94 0.26 180 0.011 250 B-PUK
VS-SD1100C08L 800 ASDD1100C08L
VS-SD1100C12L 1200 ASDD1100C12L
VS-SD1100C16L 1600 ASDD1100C16L
VS-SD1100C20L 2000 ASDD1100C20L
VS-SD1100C22C 2200 ASDD1100C22C
VS-SD1100C22L 2200 ASDD1100C22L
VS-SD800C24L 1180 (55) 2400 13600 925 1.10 0.34 150 0.009 255 B-PUK
VS-SD800C30L 3000 ASDD800C30L
VS-SD800C36L 3600 ASDD800C36L
VS-SD1100C04C 1400 (55) 400 13000 846 0.94 0.26 180 0.007 83 B-43
VS-SD1100C08C 800 ASDD1100C08C
VS-SD1100C12C 1200 ASDD1100C12C
VS-SD1100C16C 1600 ASDD1100C16C
VS-SD1100C20C 2000 ASDD1100C20C
VS-SD1500C04L 1600 (55) 400 16600 1386 0.95 0.25 180 0.009 255 B-PUK
VS-SD1500C08L 800 ASDD1500C08L
VS-SD1500C12L 1200 ASDD1500C12L
VS-SD1500C16L 1600 ASDD1500C16L
VS-SD1500C20L 2000 ASDD1500C20L
VS-SD1500C25L 2500 ASDD1500C25L
VS-SD1500C30L 3000 ASDD1500C30L
VS-SD1700C40K 1875 (55) 4000 20000 2000 0.99 0.29 150 0.002 425 K-PUK
VS-SD1700C45K 4500 ASDD1700C45K
VS-SD1700C24K 1875 (55) 2400 24000 2890 1.02 0.21 ASDD1700C24K
VS-SD1700C30K 3000 ASDD1700C30K
VS-SD1700C36K 3600 ASDD1700C36K
VS-SD2000C04L 2100 (55) 400 23900 2857 0.86 0.12 180 0.009 255 B-PUK
VS-SD2000C08L 800 ASDD2000C08L
VS-SD2000C10L 1000 ASDD2000C10L
VS-SD2500C12K 3000 (55) 1200 31000 4810 0.97 0.13 180 0.002 425 K-PUK
VS-SD2500C16K 1600 ASDD2500C16K
VS-SD2500C20K 2000 ASDD2500C20K
VS-SD2500C24K 2400 ASDD2500C24K
VS-SD2500C25K 2500 ASDD2500C25K
VS-SD3000C04K 3800 (55) 400 35800 6410 0.86 0.07 180 0.002 425 K-PUK
VS-SD3000C08K 800 ASDD3000C08K
VS-SD3000C10K 1000 ASDD3000C10K

Part Numbering Guide for Standard Recovery Diodes:

AS DD 11 0 C 16 L
DD Product group: Rectifier Diode Disc.
11 Essential part number.
0 Standard recovery.
C Ceramic PUK.
16 Voltage class VRRM x 100.
L PUK case B-PUK (DO-200AB).

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.

Photo Gallery

The photo gallery shows many different semiconductor devices, semiconductor chips and SCRs produced by AS ENERGITM, examples of test reports.

Photo of Rectifier Diodes:

Installation recommendations for disc type power rectifier diodes:

Assembling a diode with a heatsink

The reliability of heat transfer and electrical contact between the mating surfaces of the diode and the cooler over the entire temperature range is ensured by appropriate torque (clamping force).

Before assembly you should perform visual inspection (1) contact surfaces for mechanical damages and wipe (2), soaked with alcohol (toluene, gasoline, acetone).

After inspection, fix the current contacts (leads), install a pin to fix the alignment of the structure.

To improve the parameters of heat transfer it is recommended to lubricate (3) a thin layer of silicone thermal conductive paste before the assembly, which is not a mandatory condition for installation.

Install the diode (3), the second part of the cooler, the fiberglass insulator and the thrust washer.

To thread the traverse (4) and evenly tighten the nuts. Make sure no misalignment and evenness of the contact surfaces.

When the parts are sufficiently clamped but moveable, we recommend placing the cooler on a flat surface and checking the tolerance for parallelism of the overall adjacent plane of the surfaces (5).

Clamp each nut in turn (about a quarter turn) to the stop (6). The amount of deflection of the traverse determines whether the achieved clamping force corresponds to the required one.

After installation, the fasteners (nuts and washers) must be additionally secured against corrosion.

Tips and recommendations for power diodes:

The power diodes should not be operated for long periods of time at their limit load for all parameters. In this case, the safety factor is determined by the required degree of reliability of the device.

Replace a failed power diode with a diode that matches the parameters of the one being replaced.

Supercooling must be provided when operating in an environment with an elevated ambient temperature.

Periodic cleaning of power diodes and coolers to remove dust and contaminants is recommended to ensure proper heat dissipation.

Inductive current dividers (often twisted toroidal wire) should be used to equalize currents between power diodes connected in parallel. The most popular connection methods are closed circuit, common coil circuit, or power diode. The efficiency of current dividers in this case is determined by the cross section of the magnetic wire.

Prevention of voltage unbalance when power diodes are connected in series is achieved by using shunt resistors connected in parallel with each diode. Voltage equalization in transient conditions is provided by connecting capacitors in parallel to each diode.

It is strictly forbidden to touch power diodes under high voltage during operation.

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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