High Power Fast Recovery Diodes IXYS WESTCODE Replacement

High Power Fast Recovery Diodes (High Power FRD) in disc design are press pack type general-purpose diodes with blocking voltages up to 6500V and current ratings up to 4200A.

High Power Fast Recovery Diodes ADDE AS ENERGITM are a replacement, analog, alternative semiconductor devices for High Power Sonic FRD IXYS UK Westcode, Littelfuse Technology, formerly Westcode Semiconductors.

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

Part numbering guide for High Power Fast recovery diodes

youtubeVideo: Reviews of high power disc diodes

icon AS ENERGITM Semiconductors Manufacturing Reference

Ultra fast and ultra soft recovery diode available up to 6.5kV in current ratings from 270A to 4200A. These diodes incorporate a unique manufacturing process and lifetime control to offer a class leading trade-off between conduction and switching losses. The wide safe operating area makes them ideal as freewheeling diodes for snubberless IGBT and IGCT applications or any application which requires a fast, low loss diode. For example, traction, medium voltage drives, induction heating and pulsed power applications.

Features: class-leading performance and reliability; optimised for line frequency; low on-state losses; high reverse voltage and high current handling capabilities, high surge capability.

Rectifier diodes convert DC and AC currents up to 12.1 kA in circuits with voltages up to 7.2 kV. Their main applications are rectifiers for variable large AC drives, traction converters, trackside substations, welding and DC power supplies. Devices are primarily intended for applications with line frequencies up to 500Hz.

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, datasheets PDF, outline drawings for rectifier 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 10 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 high power fast recovery diodes depends on the voltage class, quantity, delivery terms, manufacturer, country of origin and form of payment.

General specifications of High Power Fast Recovery Diodes IXYS WESTCODE and Replacements

IFSM I2t Irm trr VT0 rT Tvj max RthJK Case Dimensions
Data sheet
V A A A2·s A μs V mΩ ºC K/W mm PDF
E0330MF65F 6500 277 2790 38.9x103 400 1.2 1.890 5.80 125 0.0425 W99 75x59x30 ADDE0330MF65F
E0460QC40E 4000 533 6800 231x103 460 1.15 2.246 2.716 140 0.0274 W68 60x38x26 ADDE0460QC40E
E0460QC45E 4500 ADDE0460QC45E
E0660NC40E 4000 760 9160 420x103 700 1.1 2.194 1.814 140 0.0200 W5 74x47x27 ADDE0660NC40E
E0660NC45E 4500 ADDE0660NC45E
E0660NH40E 4000 760 9160 420x103 700 1.1 2.194 1.814 140 0.0200 W47 74x47x14 ADDE0660NH40E
E0660NH45E 4500 ADDE0660NH45E
E0800QC20C 2000 1015 8900 396x103 720 1.6 1.620 0.640 150 0.0290 W68 60x38x26 ADDE0800QC20C
E0800QC25C 2500 ADDE0800QC25C
E1000TF65F 6500 820 8455 357x103 1000 1.2 1.895 1.925 125 0.0141 W97 112x75x30 ADDE1000TF65F
E1200NC20C 2000 1473 12900 832x103 650 3.8 1.620 0.440 150 0.0200 W5 74x47x27 ADDE1200NC20C
E1200NC25C 2500 ADDE1200NC25C
E1200NH20C 2000 1473 12900 832x103 650 3.8 1.620 0.440 150 0.0200 W47 74x47x14 ADDE1200NH20C
E1200NH25C 2500 ADDE1200NH25C
E1250HC45E 4500 1355 20500 2.11x106 1000 1.2 2.072 1.166 140 0.0105 W122 100x66x26 ADDE1250HC45E
E1300VF40C 4000 1312 14000 980x103 1500 1.1 2.130 1.060 150 0.0130 W43 100x63x26 ADDE1300VF40C
E1300VF45C 4500 ADDE1300VF45C
E1500MC33E 3300 1580 17330 1.5x106 1380 1.85 1.509 0.464 140 0.0162 W54 74x50x26 ADDE1500MC33E
E1500NC36P 3600 1280 17050 1.45x106 1425 2.8 1.417 0.656 140 0.0190 W5 74x47x27 ADDE1500NC36P -
E1500NC42P 4200 ADDE1500NC42P
E1500NC48P 4800 ADDE1500NC48P
E1500NH36P 3600 1280 17050 1.45x106 1425 2.8 1.417 0.656 140 0.0190 W47 74x47x14 ADDE1500NH36P
E1500NH42P 4200 ADDE1500NH42P
E1500NH48P 4800 ADDE1500NH48P
E1780TG65E 6500 1780 25600 3.29x106 1750 1.22 2.021 0.983 140 0.0077 W125 112x75x30 ADDE1780TG65E
E1800TC45E 4500 2215 29050 4.22x106 1490 1.15 2.171 0.634 140 0.0068 W28 112x75x26 ADDE1800TC45E
E2250VF20C 2000 2426 25200 3.17x106 1650 1.90 1.510 0.250 150 0.0130 W43 100x63x26 ADDE2250VF20C
E2250VF25C 2500 ADDE2250VF25C
E2400TC40C 4000 2233 25600 3.29x106 2050 1.50 2.060 0.590 150 0.0080 W28 112x75x26 ADDE2400TC40C
E2400TC45C 4500 ADDE2400TC45C
E2400EC45E 4500 2490 32100 5.15x106 2130 1.22 2.114 0.646 140 0.0056 W111 124x85x26 ADDE2400EC45E
E3000EC45C 4500 3410 45700 10.5x106 3050 1.25 2.124 0.339 140 0.0050 W111 124x85x26 ADDE3000EC45C
E3000EC45E 4500 ADDE3000EC45E
E4000TC20C 2000 4076 46500 10.8x106 2480 2.50 1.400 0.150 150 0.0800 W28 112x75x26 ADDE4000TC20C
E4000TC25C 2500 ADDE4000TC25C
E4000FD45E 4500 4210 54800 15.0x106 3650 1.50 2.117 0.351 140 0.0035 W59 144x100x26 ADDE4000FD45E

Drawings and housings dimensions for Diodes IXYS WESTCODE and Replacements:

Package type Mounting force Fm Dimensions ØDxØdxH Weight
WC W1 3 - 5 kN 42x19x14 mm 0.07 kg
YC W2 5 - 8 kN 42x25x14 mm 0.09 kg
YH W3 5 - 8 kN 42x25x26 mm 0.14 kg
LC W4 10 - 20 kN 58x34x27 mm 0.34 kg
NC W5 19 - 26 kN 74x47x27 mm 0.51 kg
VC W6 27 - 34 kN 102x63x34 mm 1.0 kg
ZC W7 27 - 47 kN 110x73x37 mm 1.7 kg
TC W28 63 - 77 kN 112x75x26 mm 1.23 kg
TD W29 63 - 77 kN 112x75x35 mm 1.7 kg
ND W37 19 - 26 kN 74x47x21 mm 0.51 kg
ZD W42 27 - 47 kN 110x73x26 mm 1.2 kg
VF W43 27 - 34 kN 100x63x26 mm 0.8 kg
NH W47 19 - 26 kN 74x47x14 mm 0.51 kg
DB W49 20 - 24 kN 62x44x8 mm 0.12 kg
FC W52 80 - 100 kN 144x100x35 mm 2.8 kg
MC W54 25 - 31 kN 74x50x26 mm 0.53 kg
FD W59 80 - 100 kN 144x100x26 mm 2.0 kg
QC W68 12 - 20 kN 60x38x26 mm 0.3 kg
TJ W89 60 - 70 kN 112x75x26 mm 1.2 kg
TE W94 60 - 70 kN 112x75x35 mm 1.7 kg
TF W97 20 - 30 kN 112x75x30 mm 1.0 kg
MF W99 12 - 16 kN 75x59x30 mm 0.6 kg
EC W111 72 - 93 kN 124x85x26 mm 1.6 kg
ED W112 76 - 93 kN 124x85x35 mm 2.2 kg
JK W113 16 - 20 kN 50x32x14 mm 0.2 kg
QA W117 16 - 20 kN 60x38x26 mm 0.33 kg
LG W120 10 - 20 kN 58x34x35 mm 0.4 kg
HA W121 32 - 40 kN 100x66x26 mm 1.2 kg
HC W122 32 - 40 kN 100x66x26 mm 1.2 kg
HE W123 32 - 40 kN 100x66x35 mm 1.2 kg
TG W125 50 - 60 kN 112x75x30 mm 1.15 kg

Part Numbering Guide for High Power Fast Recovery Diodes:

A DDE 4000 FD 45 E
DDE Product group: Diode Disc type, High Power Fast Recovery Diode.
4000 Average forward current IF(AV), Amp.
FD Housing (package) type.
45 Voltage class VRRM / 100.
E Fixed code, product series.

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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