Power Avalanche Diodes – Series Overview, Specifications, Datasheets


What is Power Avalanche Diode?

Avalanche diodes differ from standard rectifier diodes in that avalanche diode operation is possible in avalanche breakdown mode. Such diodes have controlled avalanche formation.

Typically, an avalanche diode is characterized by the value of breakdown voltage VBR, that describes the minimum value of the start of avalanche breakdown.

The avalanche diode is also characterized by the breakdown energy parameters: the maximum permissible shock peak power dissipation PRSM and/or the energy loss during avalanche breakdown.

Avalanche diodes are allowed to operate for a long time interval in the area of electric avalanche breakdown on the reverse branch of the current-voltage curve:

Current-Voltage Curve

The essence of avalanche formation is that when a diode is subjected to a reverse voltage greater than the breakdown voltage, the reverse current increases very rapidly.

In a standard non avalanche diode, current is concentrated at individual points of the p-n junction and a local thermal breakdown occurs - a standard rectifier diode fails.

In an avalanche diode, the reverse current is evenly distributed across the surface of the p-n junction, due to which the diode is able to dissipate a power pulse.

p-n junction

Thus, avalanche diodes are effectively used to protect electric circuits from pulse voltage overloads.

Power Rectifier Avalanche Diodes are typically used in various power rectifiers, such as welding and electroplating equipment, uncontrolled or semi-controlled rectifier bridges, to prevent the detrimental effects of switching overvoltages.

All disk-type (capsule type) avalanche diodes presented on this site have a standard press-pack type ceramic housing. They are pressed with a relatively high force into heat-sinks which also serve as electrical contacts to the diode terminals.

Avalanche diodes available on AS ENERGITM website have the following parameter ranges: the forward current rating IFAV ranges from 320A to 5000A, and the range of reverse blocking voltage VRRM is from 400V to 6000V.

Power Rectifier Diodes

Today, Power Avalanche Diodes are a key component in high-power rectifiers, soft starter, power supplies, AC/DC switching, aluminum smelting and other metal refining as well as trackside supply.

See also articles: Standard Rectifier Diodes, Phase Control Thyristors (PCT), Fast Thyristors, Fast Switching Thyristors, Thyristor Modules – Series Overview.

For questions regarding the acquisition of Rectifier Diodes, SCR Thyristors, Thyristor Diode 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.


Series of Power Avalanche Diodes:

Avalanche Diodes DL series AS ENERGITM

Power Avalanche Diodes DL series AS ENERGITM are available with forward current IFAV ratings from 320A to 5000A and reverse blocking voltages VRRM from 400V to 6000V.

Features of avalanche diodes: low on-state voltage, self protected against transient over-voltages; guaranteed maximum avalanche power dissipation.

Type IF(AV)M
(TC, °C)
VRRM IFRMS IFSM I2t VF0 rF Tvj max Rth(j-c) Fm W Package Dimensions ØDxØdxH Data sheet
A (°C) V A kA kA2·s V mΩ °C °C/W kN kg mm PDF
DL123-320 320 (113) 400-1600 770 5.5 151 0.90 0.830 150 0.075 5-7 0.07 PD21 42x19x14
DL133-500 500 (113) 400-1600 785 12 720 0.85 0.410 150 0.040 9-11 0.18 PD32 54x33x20
DL233-500 500 (110) 1000-2400 785 12 720 0.89 0.350 160 0.036 9-11 0.18 PD32 54x33x20
DL333-500 500 (123) 1000-1800 785 12 720 0.87 0.366 150 0.040 9-11 0.18 PD32 54x33x20
DL243-500 500 (120) 2000-2800 785 13 845 1.00 0.800 150 0.027 14-16 0.24 PD42 60x37x20
DL243-630 760 (110) 3600-4400 1190 9 405 1.10 0.700 160 0.027 14-16 0.24 PD42 60x37x20
DL243-800 880 (110) 2800-3400 1380 11 605 1.00 0.500 160 0.027 14-16 0.24 PD42 60x37x20
DL243-1000 1100 (110) 2000-2600 1727 14 980 0.85 0.300 160 0.027 14-16 0.24 PD42 60x37x20
DL343-630 630 (100) 2800-3600 989 12 720 1.00 1.070 150 0.027 14-16 0.24 PD42 60x37x20
DL153-800 800 (90) 4400-6000 1256 12 720 1.31 0.740 150 0.020 22-26 0.55 PD53 75x50x26
DL153-1000 1000 (100) 3800-5000 2500 18 1620 1.30 0.540 175 0.020 22-26 0.55 PD53 75x50x26
DL153-1250 1250 (115) 2200-3200 2095 26 3380 1.10 0.350 175 0.020 22-26 0.55 PD53 75x50x26
DL153-1600 1600 (100) 2200-3200 2515 27 3645 0.95 0.320 175 0.020 22-26 0.55 PD53 75x50x26
DL153-2000 2000 (100) 1600-2000 3140 30 4500 1.00 0.030 175 0.020 22-26 0.55 PD53 75x50x26
DL253-1250 1250 (100) 3200-4500 1962 28 3920 1.32 0.440 175 0.018 22-26 0.55 PD53 75x50x26
DL253-1600 1600 (110) 2200-3600 2500 32 5120 0.90 0.189 175 0.018 22-26 0.55 PD53 75x50x26
DL253-2000 2000 (101) 1000-1800 3140 30 4500 0.95 0.220 175 0.018 22-26 0.55 PD53 75x50x26
DL253-2500 2500 (100) 1600-2800 - 36 - 0.88 0.130 175 0.018 22-26 0.55 PD53 75x50x26
DL353-1600 1600 (100) 2200-3400 2512 26 3300 1.05 0.330 175 0.018 22-26 0.55 PD53 75x50x26
DL553-1600 1600 (85) 2800-4200 2512 30 13000 0.92 0.210 160 0.018 22-26 0.60 PD53 75x50x26
DL553-2000 2000 (85) 1600-3800 3140 33 13000 0.84 0.170 160 0.018 22-26 0.60 PD53 75x50x26
DL553-2500 2500 (85) 1600-3600 3925 36 13000 0.80 0.110 160 0.018 22-26 0.60 PD53 75x50x26
DL653-2000 2000 (85) 3400-3800 3140 33 13000 1.00 0.175 160 0.018 24-28 0.80 PD54 75x51x35
DL653-2500 2500 (85) 3400-3600 3925 36.3 13000 0.96 0.110 160 0.018 24-28 0.85 PD54 75x51x35
DL563-3200 3200 (100) 1800-3400 5024 46 20000 0.88 0.093 160 0.013 27-33 0.71 PD63 87x60x26
DL173-2500 2500 (103) 3200-4400 3925 40 8000 1.35 0.205 175 0.011 40-50 1.2 PD73 107x75x26
DL173-3200 3200 (100) 2400-3200 5000 45 10125 1.10 0.124 175 0.011 40-50 1.2 PD73 107x75x26
DL173-4000 3860 (100) 1600-2400 6060 50 12500 1.00 0.080 175 0.011 40-50 1.2 PD73 107x75x26
DL173-5000 5000 (84) 1000-1800 7850 60 18000 0.60 0.125 175 0.0085 40-50 1.5 D.F3 107x80x26
DL273-3200 3200 (103) 3000-3600 5024 42 8800 1.05 0.200 175 0.0085 40-50 1.5 D.F3 107x80x26
DL573-3200 3200 (100) 2400-3800 5024 40 25000 0.90 0.110 160 0.010 45-50 1.3 PD73 107x75x26
DL573-4000 4000 (100) 1600-3800 6280 50 25000 0.87 0.090 160 0.010 45-50 1.3 PD73 107x75x26
DL573-5000 5000 (100) 1200-1800 7850 60 25000 0.80 0.045 160 0.010 45-50 1.3 PD73 107x75x26
DL673-3200 3200 (100) 3400-3800 5024 40 25000 0.90 0.110 160 0.011 45-50 1.62 PD74 107x75x35
DL673-4000 4000 (100) 3400-3800 6280 50 25000 0.87 0.090 160 0.011 45-50 1.62 PD74 107x75x35

Avalanche Diodes ABB Power Grids (Hitachi Energy)

Avalanche Diodes 5SDD series ABB Power Grids (Hitachi Energy) are available with forward current IFAV ratings from 600A to 2700A and reverse blocking voltages VRRM from 1100V to 5000V.

Features of avalanche diodes: low on-state voltage, avalanche reverse characteristics, high operational reliability, suitable for parallel operation.

Type IF(AV)M
(TC=85°C)
VRRM IFSM VF0 rF PRSM Tvj max Rth(j-c) Rth(c-h) Fm
±10%
Package Replacement
AS ENERGITM
Data sheet
A V kA V mΩ kW ºC K/kW K/kW kN PDF
5SDA 06D3807 690 3800 7.0 1.10 1.01 50 160 40 10 11 D ADA 600-38-D-07
5SDA 06D4407 4400 ADA 600-44-D-07
5SDA 06D5007 5000 ADA 600-50-D-07
5SDA 07D3206 790 3200 7.6 1.01 0.72 50 160 40 10 11 D ADA 700-32-D-06
5SDA 07D3806 3800 ADA 700-38-D-06
5SDA 08D2905 910 2900 9.2 0.93 0.52 50 160 40 10 11 D ADA 800-29-D-05
5SDA 08D3205 3200 ADA 800-32-D-05
5SDA 09D2004 1020 2000 11.5 0.87 0.39 50 160 40 10 11 D ADA 900-20-D-04
5SDA 09D2304 2300 ADA 900-23-D-04
5SDA 09D2604 2600 ADA 900-26-D-04
5SDA 10D1703 1140 1700 13.5 0.83 0.30 50 160 40 10 11 D ADA 1000-17-D-03
5SDA 10D2003 2000 ADA 1000-20-D-03
5SDA 10D2303 2300 ADA 1000-23-D-03
5SDA 11D1102 1310 1100 15.0 0.74 0.25 50 160 40 10 11 D ADA 1100-11-D-02
5SDA 11D1402 1400 ADA 1100-14-D-02
5SDA 11D1702 1700 ADA 1100-17-D-02
5SDA 14F3807 1410 3800 17.5 1.13 0.44 50 160 20 5 22 F ADA 1400-38-F-07
5SDA 14F4407 4400 ADA 1400-44-F-07
5SDA 14F5007 5000 ADA 1400-50-F-07
5SDA 16F3206 1620 3200 20.5 1.03 0.32 50 160 20 5 22 F ADA 1600-32-F-06
5SDA 16F3806 3800 ADA 1600-38-F-06
5SDA 19F2905 1870 2900 23.5 0.95 0.23 75 160 20 5 22 F ADA 1900-29-F-05
5SDA 19F3205 3200 ADA 1900-32-F-05
5SDA 21F2604 2110 2600 26.0 0.89 0.17 75 160 20 5 22 F ADA 2100-26-F-04
5SDA 21F2904 2900 ADA 2100-29-F-04
5SDA 21F3204 3200 ADA 2100-32-F-04
5SDA 24F1703 2350 1700 29.0 0.84 0.13 75 160 20 5 22 F ADA 2400-17-F-03
5SDA 24F2003 2000 ADA 2400-20-F-03
5SDA 24F2303 2300 ADA 2400-23-F-03
5SDA 27F1402 2700 1400 31.0 0.79 0.09 100 160 20 5 22 F ADA 2700-14-F-02
5SDA 27F1702 1700 ADA 2700-17-F-02
5SDA 27F2002 2000 ADA 2700-20-F-02

Air-cooled and Water-cooled heat-sinks for disc type rectifier diodes

The operation of semiconductor devices at high currents and high reverse voltages is accompanied by high power in the p-n junction of the silicon chip.

Air and water heat sinks are used for cooling power rectifier diodes.

The heat sink is characterized by the value of power dissipation and the area of the cooling surface and is selected on the basis of the required heat dissipation at the operating power of the diode.

In disk-type rectifier diodes, the necessary compression of the press contacts is provided only if they are assembled with heatsinks.

To keep electrical losses to a minimum and heat dissipation to a maximum, the necessary clamping force Fm must be provided during assembly.

Range of values of axial force on diode Fm, i.e. diode compression force, is from 10 to 100 kN depending on package diameter (housing type) and is specified in datasheet.

Heatsinks are used for disc (tablet type) semiconductors with сontact surface diameter from Ø19 mm to Ø100 mm.

See for more information about heatsinks for disc type rectifier diodes:
"Air-cooled heatsinks O series", "Air heatsink SF series", "Water heatsink SS series".


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.


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Our products are certified and correspond to international standards.
Our company provides a quality guarantee for products of 2 years.
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Each product is tested for the main parameters, and Test reports of the parameters for each product are provided.

Test Report

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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.

For questions regarding the acquisition of Rectifier Diodes, SCR Thyristors, Thyristor Diode 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.

 

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