the MMBT4401 is a silicon NPN transistor preferred for use in general purpose amplifier and switch applications
marking code: 2X
Ucb: 40V
Ic: 0.6A
β (Ic/Ib): 100-300
N: 350mW
F: 250MHz
Characteristics of the MMBT4401 bipolar transistor
Marking
The MMBT4401 transistor marking is "2X".
Complementary
The complementary p-n-p transistor to the MMBT4401 is the MMBT4403.
Replacement and equivalent transistor for the MMBT4401
You can replace the MMBT4401 with the BCW66, FMMT2222A, FMMT2222AR, FMMT491, FMMT491Q, FMMT619, KN2222AS, KST2222A, KST4401, KTN2222AS, MMBT2222A, PMBT2222A, PMBT4401 or PMST2222A