For a replacement internal power supply unit (PSU) for your PS4 Pro (CUH-7100 series), the ADP-300ER or the N15-300P1A is the specific model you’re looking for. When sourcing a replacement, ensure it meets the following criteria:

1. Compatibility: Verify that the replacement PSU is compatible with the CUH-7100 series PS4 Pro model. Both the ADP-300ER and N15-300P1A should be suitable for this series.
2. Power Rating: Confirm that the replacement PSU has the same power rating as the original. This includes the input and output voltage, current, and wattage. The input voltage range is typically 100-240V AC, and the output voltage is around 12V DC.
3. Connector Type: Ensure that the replacement PSU has the same connector type as the original to ensure a proper fit and connection within the console.
4. Safety and Quality: Purchase the replacement PSU from a reputable source to ensure it meets safety standards and quality requirements. Avoid buying from unknown or unverified sellers to prevent potential damage to your console.
5. Warranty: Check if the replacement PSU comes with any warranty or guarantee, which can provide peace of mind regarding its quality and reliability.

You can find replacement PSUs from various electronics suppliers, including official Sony parts distributors or authorized repair centers. Always double-check the compatibility and specifications before making a purchase to avoid any issues with installation or operation.