I recently had an inquiry about the washability of pulse transformer HX5401NL Digikey part number 553-1848-ND.
Here is the Response directly from the manufacturer:
It is washable.
6.0 Post Reflow Cleaning
Post reflow flux cleaning is recommended for Pulse BGA devices. Ultrasonic cleaning is permissible. Alcohol based solvents and other properly controlled water cleaning systems are acceptable. Most solvents that are acceptable to other components on circuit assemblies are equally acceptable for use with these devices. Surfactants can be introduced to improve water penetration and flow. An adequate drying profile should be used to ensure that no water is trapped beneath the device upon the completion of cleaning. It is important to closely adhere to both the solvent and the solder paste supplier’s recommendations.