ERJT14J4R7U - Panasonic

ERJT14J4R7U Frequently Asked Questions (FAQs)

• What is the recommended land pattern for ERJT14J4R7U?
  The recommended land pattern for ERJT14J4R7U is a rectangular pad with a size of 2.5mm x 1.25mm, with a 0.5mm hole in the center for the chip resistor's terminal. The pad should be designed with a solder mask opening of 2.2mm x 1.0mm to ensure proper soldering.
• How do I handle the ERJT14J4R7U's power rating in my design?
  The ERJT14J4R7U has a power rating of 0.25W. To ensure reliable operation, the resistor should be derated based on the ambient temperature and the desired reliability level. A general rule of thumb is to derate the power rating by 50% for every 25°C increase in ambient temperature above 70°C.
• What is the tolerance of the ERJT14J4R7U's resistance value?
  The ERJT14J4R7U has a resistance tolerance of ±5%. This means that the actual resistance value may vary by up to 5% from the nominal value of 4.7kΩ.
• Is the ERJT14J4R7U suitable for high-frequency applications?
  The ERJT14J4R7U is a general-purpose chip resistor and is not optimized for high-frequency applications. While it can be used in high-frequency circuits, its performance may be affected by parasitic inductance and capacitance. For high-frequency applications, it's recommended to use a high-frequency chip resistor specifically designed for such applications.
• How do I ensure the ERJT14J4R7U's reliability in harsh environments?
  To ensure the ERJT14J4R7U's reliability in harsh environments, it's recommended to follow proper mounting and soldering techniques, and to ensure that the resistor is not subjected to excessive mechanical stress, moisture, or extreme temperatures. Additionally, conformal coating or potting may be necessary to protect the resistor from environmental factors.