Found 4 alternatives for MPQ6100A by Rochester Electronics, LLC. Transistors Bipolar Bjt Arrays — 14-DIP (0.300", 7.62mm).
SMALL SIGNAL BIPOLAR TRANSISTOR
TRANS 4NPN 40V 0.5A
IC-3 ISOLATED TRANS. 14-LEAD
TRANS 4NPN 15V 0.5A