2395799_en-US

Question about C16 capacitor rating in MRF300AN 27MHz reference design

Hello NXP Support Team,

I am currently reviewing the MRF300AN 27MHz reference design and have a question regarding capacitor C16 on the output side.

According to the BOM I have (e.g., from the Farnell datasheet), C16 is specified as a 39,000 pF (39 nF) / 50V chip capacitor (ATC part 200B393KT50XT). Given that the MRF300AN operates at a 50V drain voltage and the output stage handles high RF power (up to 300W+), I am concerned that a 50V-rated capacitor in this position might be insufficient for reliable long-term operation.

My questions are:

Is the 50V rating for C16 in the BOM correct, or could it be a typo?
What is the exact function of C16 in this circuit? Is it part of the output matching network, a DC blocking capacitor, or a bypass/decoupling capacitor?
If it is indeed a DC blocking or matching capacitor in the RF output path, wouldn't a higher voltage rating (e.g., 100V or higher) be more appropriate to handle voltage transients and standing waves?

I would greatly appreciate your clarification on this matter. Thank you for your time and support.

Best regards,