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| LM2940-5V资料 | |
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LM2940-5V PDF Download |
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File Size : 116 KB
Manufacturer: Description:The line on the graph shows the actual temperature that might be experienced on the surface of a test board at or near a central solder joint. The two profiles are based on a high density and a low density board. The Vitronics SMD310 convection/infrared reflow soldering system was used to generate this profile. The type of solder used was 62/36/2 Tin Lead Silver with a melting point between 177−189C. When this type of furnace is used for solder reflow work, the circuit boards and solder joints tend to heat first. The components on the board are then heated by conduction. The circuit board, because it has a large surface area, absorbs the thermal energy more efficiently, then distributes this energy to the components. Because of this effect, the main body of a component may be up to 30 degrees cooler than the adjacent solder joints. |
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| 1PCS | 100PCS | 1K | 10K | ||
| 价 格 | |||||
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型 号：LM2940-5V 厂 家： 封 装：07+ 批 号：TO-220 数 量： 说 明：10 |
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运 费： 所在地： 新旧程度： |
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| 联系人：林小姐 |
| 电 话：0755-83041767,82716726 |
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| 公司地址： 深圳市福田区华强北佳和大厦4C143 |
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