Found 4 alternatives for FK4B01120L1 by Panasonic Electronic Components. Transistors Fets Mosfets Single — 4-XFLGA, CSP.
MOSFET N-CH 12V 3.4A XLGA004
MOSFET P-CH 12V 1.4A ALGA004
MOSFET P-CH 12V 2.6A ULGA004
MOSFET N-CH 12V 2.3A ALGA004