I like these rectifier PCBs. Looks good and comes already fully assembled. Measured about 3.3 mF (three PCBs). Mine have a KBU808 rectifier on them. At 5A DC (12V in) I measured a voltage drop of 0.85 V for each diode. So 1.7 V in total. Of course the rectifier gets hot with P_loss = 8.5 W. I would recommend to add a heat sink in this use case. The missing 1.3 V in my picture is lost on the leads. The PCB resistance is with about 1.5 mOhm (rectifier to output pin 7.5 V@5 A) barely measurable. I recommend these parts.
working as expected.