Vishay provides a recommended PCB layout and land pattern in their application note AN10343, which can be found on their website. It's essential to follow these guidelines to ensure proper thermal performance and reliability.
Vishay recommends using a thermal interface material (TIM) with a thermal conductivity of at least 1 W/m-K. The TIM should be applied evenly and thinly (typically 0.05 mm to 0.10 mm) to the base plate of the resistor. Vishay also provides a list of recommended TIMs in their application note AN10343.
While the datasheet specifies a maximum power rating of 10 W, this rating is derated at high temperatures. Vishay provides a power derating curve in their application note AN10343, which shows the maximum power rating at different temperatures. For example, at 150°C, the maximum power rating is approximately 5 W.
Vishay recommends following the soldering guidelines in their application note AN10343, which includes using a soldering iron with a temperature of 250°C to 270°C, and ensuring the soldering time is less than 3 seconds. Additionally, using a solder with a high melting point (e.g., SAC305) and a flux with a low acidity level can help prevent solder joint defects.
The lifespan of the TR3B686K010C0900 depends on various factors, including the operating temperature, power rating, and environmental conditions. However, Vishay estimates that the resistor can last for at least 10,000 hours at a temperature of 125°C and a power rating of 5 W. This is based on their internal reliability testing and may vary depending on the specific application.
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