Avalanche Diodes DL (DA) - Stud (200A - 400A) Flexible Lead

Stud Avalanche Diodes DL, also known as DA, regulating and converting DC and AC currents up to 400A in circuits with voltages to 1800V (depends on the diode type).

Features: self protected against transient over-voltages; guaranteed maximum avalanche power dissipation.

"Air-cooled heatsinks O series for stud devices", for avalanche diode cooling are also available to order.

icon AS ENERGITM Semiconductors Manufacturing Reference

Part numbering guide for avalanche diode

Installation recommendations for avalanche diodes

youtubeVideo: Overview of avalanche diodes DL161, DL171

Air and water heat sinks are used to cool the avalanche diodes. To provide reliable thermal and electrical contact with the heatsink a tightening torque Md must be observed during assembly. For better heat dissipation of diode during assembly, heat conducting paste is used (this is a recommendation and is not a prerequisite for installation).

Polarity of the diode is determined by the symbol on the body. In forward polarity, the diode base is the anode, the flexible long lead is the cathode; in reverse polarity (symbol "X" in the marking), the flexible lead is the anode, the base is the cathode.. The technical specifications, part numbering guide, polarity, dimensions and recommended coolers for diodes are listed below.

Air and water heat sinks are used to cool the diodes. To provide reliable thermal and electrical contact with the heatsink a tightening torque Md must be observed during assembly. For better heat dissipation of diode during assembly, heat conducting paste is used.

Avalanche Diodes DL (DA) AS ENERGITM have the following features: low static and dynamic losses, high values of VDRM/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, natural or forced air cooling.

Our company provides a quality guarantee for avalanche 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 avalanche diodes depends on the voltage class, quantity, delivery terms, manufacturer, country of origin and form of payment.

General specifications of Stud (Flexible Lead) Avalanche Diodes 200A - 400A

Type IF(AV)
W Pack Data-sheet
A V kA A V A V mΩ mA ºC Nm ºC/W g type PDF
DL161-200-4 200 400 7.5 330 1.40 628 0.92 0.68 25 150 20-30 0.130 265 SD6
DL161-200-5 500
DL161-200-6 600
DL161-200-7 700
DL161-200-8 800
DL161-200-9 900
DL161-200-10 1000
DL161-200-11 1100
DL161-200-12 1200
DL161-200-14 1400
DL161-200-16 1600
DL161-200-18 1800
DL161-200X-4 200 400 6.5 314 1.40 628 0.87 0.84 25 150 20-30 0.130 265 SD6
DL161-200X-5 500
DL161-200X-6 600
DL161-200X-7 700
DL161-200X-8 800
DL161-200X-9 900
DL161-200X-10 1000
DL161-200X-11 1100
DL161-200X-12 1200
DL161-200X-14 1400
DL161-200X-16 1600
DL161-200X-18 1800
DL161-250-4 250 400 7.5 393 1.40 785 0.85 0.63 25 150 20-30 0.130 265 SD6
DL161-250-5 500
DL161-250-6 600
DL161-250-7 700
DL161-250-8 800
DL161-250-9 900
DL161-250-10 1000
DL161-250-11 1100
DL161-250-12 1200
DL161-250-14 1400
DL161-250-16 1600
DL161-250-18 1800
DL171-320-4 320 400 10 500 1.40 1000 1.0 0.50 25 150 25-35 0.085 465 SD7
DL171-320-5 500
DL171-320-6 600
DL171-320-7 700
DL171-320-8 800
DL171-320-9 900
DL171-320-10 1000
DL171-320-11 1100
DL171-320-12 1200
DL171-320-14 1400
DL171-320-16 1600
DL171-320-18 1800
DL171-320X-4 320 400 12 502 1.40 1000 0.853 0.524 25 150 25-35 0.075 465 SD7
DL171-320X-5 500
DL171-320X-6 600
DL171-320X-7 700
DL171-320X-8 800
DL171-320X-9 900
DL171-320X-10 1000
DL171-320X-11 1100
DL171-320X-12 1200
DL171-320X-14 1400
DL171-320X-16 1600
DL171-320X-18 1800
DL171-400-4 400 400 12 628 1.40 1256 0.75 0.42 35 150 25-35 0.080 465 SD7
DL171-400-5 500
DL171-400-6 600
DL171-400-7 700
DL171-400-8 800
DL171-400-9 900
DL171-400-10 1000
DL171-400-11 1100
DL171-400-12 1200
DL171-400-14 1400
DL171-400-16 1600
DL171-400-18 1800

Part Numbering Guide for Stud Diodes:

DL 171 - 400 - 18
DL Diode Avalanche (alternative marking "DA") brand AS ENERGITM
171 Diode type (stud type, flexible lead).
400 Average current in open state IF(AV), Amp.
18 Voltage class VRRM / 100.

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.

Heat sinks for power stud diodes:

Heat sinks (radiators) are used for cooling of power semiconductor devices in stud 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 for stud devices".

Installation recommendations for stud type power rectifier diodes:

Assembling stud 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.

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

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.

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

youtubeVideo: Overview of avalanche diodes DL161, DL171

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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