Found 5 alternatives for MDBT50Q-512K by Raytac. Rf Transceiver Modules And Modems — 61-SMD Module.
NORDIC 52833 PCB ANTENNA MODULE
NORDIC 52833 U.FL CONN MODULE
NORDIC 52840 CHIP ANTENNA MODULE
NORDIC 52840 PCB ANTENNA MODULE
NORDIC 52840 U.FL CONN MODULE