UPH2W181MHD - Nichicon

UPH2W181MHD Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for UPH2W181MHD to minimize ESR?
  Nichicon recommends a PCB layout with a large copper area for the capacitor pads, and a via connection to the internal GND plane to reduce ESR. A minimum of 2oz copper thickness is recommended.
• How does the UPH2W181MHD behave under high-frequency ripple current?
  The UPH2W181MHD is designed to handle high-frequency ripple current, but the impedance may increase at frequencies above 100kHz. It's recommended to use a simulation tool or consult with Nichicon's application engineers to determine the capacitor's behavior in specific high-frequency applications.
• What is the maximum allowed voltage derating for UPH2W181MHD?
  Nichicon recommends a maximum voltage derating of 80% to ensure reliable operation and prevent overheating. This means that for a 180V rated capacitor, the maximum allowed voltage is 144V.
• Can UPH2W181MHD be used in high-temperature environments?
  The UPH2W181MHD is rated for operation up to 125°C, but the capacitance and ESR may change at high temperatures. It's recommended to consult with Nichicon's application engineers to determine the capacitor's behavior in specific high-temperature applications.
• What is the recommended soldering profile for UPH2W181MHD?
  Nichicon 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. It's recommended to consult with Nichicon's application engineers for specific soldering profile recommendations.