Download the CFWS455EY datasheet PDF.
This datasheet also covers the CFWS455BY variant, as both devices belong to the same filters family and are provided as variant models within a single manufacturer datasheet.
FILTERS FOR COMMUNICATIONS EQUIPMENT–RESIN MOLDED,
MULTI-ELEMENT–CFUSY/CFWSY SERIES
The CFUSY lines of ceramic filters are 4-element devices connected in ladder form while the CFWSY455 filters.