FCM1608KF-601T03 Cross Reference

One alternative part number will be part number BBNQ00160808601Y00

Product Page link.

https://www.digikey.com/products/en/filters/ferrite-beads-and-chips/841?k=ferrite+chip+bead&k=&pkeyword=ferrite+chip+bead&sv=0&pv1923=140417&sf=1&FV=46|7801%2C46|7802%2C46|7811%2C1924|236913%2C-8|841%2Cmu600+Ohms+%40+100MHz|2280&quantity=&ColumnSort=0&page=1&pageSize=25

One of the specifications that is different is the Current rating.
The FCM1608KF-601T03 is 200mA.
The BBNQ00160808601Y00 is 350mA.

It is similar in specifications. I would recommend verifying the specifications with the data sheet. See link below.