1140-123K-RC - Bourns

1140-123K-RC Frequently Asked Questions (FAQs)

• What is the recommended PCB layout and land pattern for optimal performance?
  Bourns provides a recommended PCB layout and land pattern in their application notes (AN16) and on their website. It's essential to follow these guidelines to ensure proper thermal management, minimize parasitic inductance, and optimize performance.
• How do I select the correct resistor value and tolerance for my specific application?
  Bourns offers a resistor selection guide (AN13) that helps engineers choose the right resistor value and tolerance based on factors like operating temperature, power rating, and desired accuracy. You can also consult with Bourns' technical support team for customized guidance.
• What is the maximum allowable voltage for this resistor?
  While the datasheet specifies a maximum power rating, it's essential to consider the maximum allowable voltage to prevent electrical overstress. For the 1140-123K-RC, the maximum allowable voltage is 200V. However, it's recommended to derate the voltage based on the operating temperature and other environmental factors.
• How does the resistor's temperature coefficient affect its performance in my application?
  The temperature coefficient (TCR) of the 1140-123K-RC is ±100 ppm/°C. This means that the resistor's value will change by ±0.01% for every 1°C change in temperature. Engineers should consider the TCR when designing for applications with high temperature fluctuations or precise resistance requirements.
• Is the 1140-123K-RC suitable for high-frequency applications?
  While the 1140-123K-RC is a general-purpose resistor, it's not optimized for high-frequency applications. For frequencies above 100 kHz, Bourns recommends using their high-frequency resistor series, such as the 1206 series, which is designed to minimize parasitic inductance and capacitance.