Bourns provides a recommended PCB layout and land pattern in their application notes and design guides. It's essential to follow these guidelines to ensure optimal performance, thermal management, and reliability.
To ensure the power rating is not exceeded, calculate the power dissipation using the formula P = V^2/R, where V is the voltage across the resistor and R is the resistance value. Make sure the calculated power is within the resistor's power rating. Additionally, consider derating the power rating based on the ambient temperature and other environmental factors.
The TCR tolerance is typically not specified in the datasheet. However, Bourns provides a standard TCR tolerance of ±50 ppm/°C for their thick-film resistors, including the PWR221T-30-50R0J. For more precise applications, consider using a resistor with a tighter TCR tolerance or consulting with Bourns' technical support.
The PWR221T-30-50R0J is a general-purpose resistor, and its high-frequency performance may not be optimal. For high-frequency applications, consider using a resistor specifically designed for high-frequency use, such as a thin-film or metal-film resistor. Consult with Bourns' technical support for guidance on selecting the right resistor for your application.
The MSL of the PWR221T-30-50R0J is typically MSL 1, which means it can withstand a maximum of 30°C/60% RH for 168 hours. However, it's essential to verify the MSL with Bourns or the manufacturer's documentation to ensure proper handling and storage procedures.
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PWR221T-30-50R0J Overview
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