The BUK9840-55/CUX from NXP USA Inc. is an N-channel MOSFET rated 55 V, 5 A (Ta) and 10.7 A (Tc), with 8.3 W (Tc) power dissipation, in a SOT-223 surface-mount package.
The BUK9840-55,115 from Nexperia USA Inc. is an N-channel MOSFET rated 55 V and 5 A (Ta), with 1.8 W (Ta) power dissipation, in a surface-mount SOT-223 package.