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Pavlo GorkunAir Cooling Heatsink for Stud type thyristor & rectifier diode
Air Cooling Heatsinks for single-sided cooling stud type power SCR thyristors and diodes during their operation.
Heatsinks are used for semiconductor devices for currents from 10A to 500A and voltages VDRM/VRRM up to 1800V.
Heatsinks are used for stud semiconductors with metric ISO thread diameters: M5, M6, M8, M10, M12, M20x1.5, M24x1.5.
Features: natural air cooling and forced air cooling; corrosion-resistant aluminum alloy; low thermal resistance; easy installation with a mounting slot; can be either standard models can also be customizing.
For minimum electrical losses and maximum heat dissipation of the devices, the appropriate torque Md specified in the power device specifications must be observed.
Current range of SCR thyristors and rectifier diodes for which air heat sinks (coolers, radiators) are used: 10A, 15A, 16A, 20A, 25A, 30A, 32A, 40A, 50A, 60A, 63A, 80A, 100A, 125A, 150A, 160A, 200A, 250A, 300A, 320A, 400A, 500A.
The contact surfaces of the heatsink and power device must have low roughness and flatness deviations.
Before mounting the contact surfaces of the heatsink, current contact and semiconductor device should be wiped with a cloth soaked in alcohol (toluene, benzene, acetone) and it is recommended to lubricate with a thin layer of silicone-organic heat transfer paste (this is a recommendation and is not a prerequisite for installation).
Specifications and parameters, dimensions, drawings of air-cooled heat sink (radiator) are listed below.
Our company provides a quality guarantee for air cooling heatsink of 2 years from the date of purchase. When supplying heatsinks, if necessary, we provide technical passport.
The final price of air cooling heatsink depends on the quantity, delivery terms, manufacturer, country of origin and form of payment.
Air Cooling Heatsinks for stud type power semiconductors
| Type | Applicable stud thread | Power dissipation with natural cooling (PF) |
Thermal resistance Rth(h-a) | Flow resist. ΔPh | Mounting torque Md, ±10% | Cooling surface area | Weight (without power contact) | Outline, dimensions B×L×H (without power contact) | Applies to devices for current | |
| natural cooling | forced cooling (airflow Vcfh=6 m/s) | |||||||||
| W | °C/W | °C/W | Pa | N·m | cm2 | kg | mm | |||
O111 |
M5 | 10 | 5.6 | - | - | 2.0 | - | 0.092 |  35×60×40 |
10A - 25A |
O221 |
M6 | 18 | 2.8 | - | - | 2.5 | 432.478 | 0.156 |  45×60×60 |
20A - 40A |
O231 |
M8 | 30 | 2.12 | 0.67 | 15 | 5.0 | 635.406 | 0.370 |  45×80×80 |
25A - 80A |
O331 |
M8 | 30 | 2.12 | 0.67 | 15 | 5.0 | 635.406 | 0.378 |  45×80×80 |
25A - 80A |
O241 |
M10 | 30 | 2.12 | 0.67 | 15 | 10 | 635.406 | 0.375 |  45×80×80 |
60A - 100A |
 O541 |
M10 | 50 | 1.90 | 0.67 | 15 | 10 | 635.406 | 0.420 |  45×80×80 |
60A - 100A |
O151 |
M12 | 50 | 1.90 | 0.67 | 15 | 20 | 635.406 | 0.420 |  45×80×80 |
80A - 160A |
O371 |
M20x1.5 | 50 | 1.90 | 0.67 | 15 | 50 | 635.406 | 0.420 |  45×80×80 |
200A - 400A |
O171 |
M20x1.5 | 80 | 1.12 | 0.355 | 18 | 50 | 1249.94 | 0.670 |  70×80×100 |
200A - 400A |
O181 |
M24x1.5 | 80 | 1.12 | 0.355 | 18 | 60 | 1249.94 | 0.700 |  70×80×100 |
200A - 500A |
O271 |
M20x1.5 | 130 | 0.71 | 0.236 | 25 | 50 | 2173.508 | 1.750 |  110×110×100 |
200A - 400A |
O281 |
M24x1.5 | 130 | 0.71 | 0.236 | 25 | 60 | 2173.508 | 1.750 |  110×110×100 |
200A - 500A |
Application of air cooling heatsinks for stud type semiconductors
| Type | Applicable stud thread | Applies to devices for current | Application package type |
Application diode, thyristor type |
| O111 | M5 | 10A - 25A | SD1, ST1 | D112, DL112, T112, TS112 |
| O221 | M6 | 20A - 40A | SD2, ST2 | D122, DL122, T122, TS122 |
| O231 | M8 | 25A - 80A | SD3, ST3, ST3-1 | D132, DL132, T132, TS132 |
| O331 | M8 | 25A - 80A | SD3, ST3, ST3-1 | D132, DL132, T132, TS132 |
| O241 | M10 | 60A - 100A | SD4, ST4, ST4-1 | D141, T142, TS142 |
| O541 | M10 | 60A - 100A | SD4, ST4, ST4-1 | D141, T142, TS142 |
| O151 | M12 | 80A - 160A | SD5, SD8, ST5 | D151, T151, TF251 |
| O371 | M20x1.5 | 200A - 400A | SD6, ST6 | D161, DL161, T161, TS161, TS261, TF261 |
| O171 | M20x1.5 | 200A - 400A | SD6, ST6 | D161, DL161, T161, TS161, TS261, TF261 |
| O181 | M24x1.5 | 200A - 500A | SD7, ST7, D.SB1, T.SB1 | D171, DL171, T171, TL171, TL271, TL371, TS171, TF271, TFI271 |
| O271 | M20x1.5 | 200A - 400A | SD6, ST6 | D161, DL161, T161, TS161, TS261, TF261 |
| O281 | M24x1.5 | 200A - 500A | SD7, ST7, D.SB1, T.SB1 | D171, DL171, T171, TL171, TL271, TL371, TS171, TF271, TFI271 |
Part Numbering Guide for air cooling heatsinks:
| O | 2 | 8 | 1 | – | 110 |
| O | – | Product group: Heatsinks for semiconductors. |
| 2 | – | Serial number of heatsink design modification. |
| 8 | – | Series coding by mounting thread diameter for stud type heatsinks. |
| 1 | – | Serial number of the heatsink design modification for devices: 1 - stud mount version. |
| 100 | – | Length of the heatsink, mm. |
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:
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 Air Cooling Heatsinks for stud type semiconductors:
Recommendations for assembling a stud thyristor with an air heatsink:
The reliability of heat transfer and electrical contact between the mating surfaces of the thyristor 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 (this is a recommendation and is not a prerequisite for installation).
After installation, the fasteners (nuts and washers) must be additionally secured against corrosion.
Tips and recommendations for power thyristors:
The power thyristors 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 thyristor with a thyristor 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 thyristors 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 thyristors connected in parallel. The most popular connection methods are closed circuit, common coil circuit, or power thyristor. The efficiency of current dividers in this case is determined by the cross section of the magnetic wire.
Prevention of voltage unbalance when power thyristors are connected in series is achieved by using shunt resistors connected in parallel with each thyristor. Voltage equalization in transient conditions is provided by connecting capacitors in parallel to each thyristor.
It is strictly forbidden to touch power thyristors under high voltage during operation.
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.
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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