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Новинка 2020 умный Bluetooth-динамик зеркальный двойной будильник радио светодиодный
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Новый умный Bluetooth-динамик зеркальный двойной будильник радио светодиодный
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Классические мужские джинсовые шорты хорошего качества хлопковые однотонные
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История изменения цены
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| Месяц | Минимальная цена | Макс. стоимость | Цена |
|---|---|---|---|
| Mar-22-2026 | 0.37 руб. | 0.3 руб. | 0 руб. |
| Feb-22-2026 | 0.42 руб. | 0.51 руб. | 0 руб. |
| Jan-22-2026 | 0.60 руб. | 0.5 руб. | 0 руб. |
| Dec-22-2025 | 0.58 руб. | 0.36 руб. | 0 руб. |
| Nov-22-2025 | 0.99 руб. | 0.33 руб. | 0 руб. |
| Oct-22-2025 | 0.21 руб. | 0.71 руб. | 0 руб. |
| Sep-22-2025 | 0.26 руб. | 0.27 руб. | 0 руб. |
| Aug-22-2025 | 0.58 руб. | 0.13 руб. | 0 руб. |
| Jul-22-2025 | 0.15 руб. | 0.96 руб. | 0 руб. |
Описание товара
According to the customer can meet a variety of surface treatments : drilling, screen printing, chemical polishing , drawing, sandblasting , painting, matt anodizing
Various types of high -precision aluminum processing.
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Radiator Notes
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1. When the semiconductor power device junction temperature is less than the actual work of the maximum junction temperature circumstances, should try to use small size, light weight specifications.
2. The heat sink effect is closely related to the merits of the installation process , the installation should try to increase the contact area of the power device and the heat sink , reducing the contact resistance and improve heat transfer.
3. If the thermal contact resistance drops even smaller , when mounted between the power device and the heat sink plus a thin layer of thermal grease , the thermal resistance can be reduced 25 to 30% .
4. When the installation is required between the device and the heat sink thermal pad or insulation pads, recommend a low thermal resistance material , such as copper , platinum, aluminum foil or thin mica , polyester film .
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5. When installing a device , which mounting holes ( or group of apertures ) placed in the center of the heat sink base surface (L / 2) location . When installing two or more devices which mounting holes ( or set of holes ) position in the center line of the heat sink base surface
The uniform (L / 2n) position .
6. When the torque required to tighten the screws consistent devices.
7. power devices and heat sink is installed, is not appropriate for the power device and the heat sink machining or plastic surgery, or will cause stress and increase the thermal contact resistance .
8. Single fin radiator, adapted to an external device ( such as a chassis mounted external ) for natural air cooling , which is conducive to power devices also reduce ventilation temperature inside the machine .
9. After natural cooling , heat sink section should be parallel to the horizontal direction : the forced air cooling , airflow should be parallel to the flow direction of the heat sink fins
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