EEUFS1K471L - Panasonic

EEUFS1K471L Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for EEUFS1K471L to minimize ESR?
  Panasonic recommends a PCB layout with a large copper area for the capacitor pads, and a short and wide connection to the capacitor to minimize ESR. A 4-layer PCB with a solid ground plane is also recommended.
• How does the EEUFS1K471L behave under high-frequency conditions?
  The EEUFS1K471L is designed to operate up to 100 kHz, but its impedance may increase at higher frequencies due to the ESL (Equivalent Series Inductance). Panasonic recommends using a capacitor with a lower ESL value for high-frequency applications.
• What is the derating curve for the EEUFS1K471L at high temperatures?
  Panasonic provides a derating curve in the datasheet, which shows that the capacitor's capacitance and voltage rating decrease as the temperature increases. For example, at 105°C, the capacitance is derated to 80% of its nominal value.
• Can the EEUFS1K471L be used in a high-vibration environment?
  Yes, the EEUFS1K471L is designed to withstand vibrations up to 10 Hz to 2000 Hz, 10 G acceleration. However, Panasonic recommends verifying the capacitor's performance in the specific vibration environment to ensure reliability.
• What is the recommended soldering profile for the EEUFS1K471L?
  Panasonic recommends a soldering profile with a peak temperature of 260°C, a dwell time of 10-30 seconds, and a cooling rate of 2-4°C/second. The soldering process should be done in a nitrogen atmosphere to prevent oxidation.