FSC-BT1036C – Cleanliness / Ultrasonic Washing Compatibility

MAUROfme

We are preparing a cleaning process for PCBAs with the FSC-BT1036C module already mounted, and we could not find guidance in the datasheet regarding compatibility with post-assembly washing.

Could you please confirm the following:

Is the module compatible with cleaning using isopropyl alcohol (IPA)?
Is ultrasonic cleaning (typically 25-40 kHz) safe for the module, considering the internal crystal and RF shielding? If so, are there recommended limits on exposure time and power?
Have you received any failure reports from other customers related to ultrasonic cleaning after reflow/assembly?

We plan to process several hundred PCBAs and want to validate the cleaning method before running it at volume.

Thank you in advance for your help.

FAE_Gavin

MAUROfme Regarding the cleaning process after PCB assembly, we would like to share the following recommendations:

For cleaning the area around the FSC-BT1036C module, we recommend using localized cleaning with a brush and IPA (isopropyl alcohol) if needed.
We do not recommend immersing the module/PCBA in cleaning liquid, as prolonged exposure may introduce reliability risks.
We also do not recommend ultrasonic cleaning, as ultrasonic vibration may potentially affect internal components such as the crystal oscillator.