s (with Bias Resistance) Features · On-chip bias resistances (R1=2.2kΩ, R2=10kΩ). · Composite type with 2 transistors contained in the CP package currently in use, improving the mounting efficiency greatly. · The FC121 is formed with two chips, being equivalent to the 2SA1502, placed in one package. · Excellent in thermal equilibrium and pair capability.