The BD667A is a silicon PNP epitaxial planar transistor from Fairchild/ON Semiconductor. It is designed for use in a wide range of general-purpose amplifier and switching applications.

Applications:

• Audio Amplifiers
• Switching Circuits
• General Purpose Amplification
• Driver Stages
• Consumer Electronics

Features:

• High Collector Current (Ic = -1A)
• Low Collector-Emitter Saturation Voltage
• Medium Power Dissipation
• Complementary to NPN Transistor BD668A
• Available in a TO-126 Package

Benefits:

• Provides reliable amplification in audio and other circuits
• Enables efficient switching operation
• Suitable for a wide range of general-purpose applications
• Easy to design into circuits with its complementary NPN transistor
• Cost-effective solution for many electronic circuit designs

The BD667A transistor is typically used in medium-power applications where moderate current gain and low saturation voltage are required. It is often paired with the BD668A NPN transistor in complementary push-pull amplifier circuits. The technical specifications include a collector-emitter voltage (Vceo) of -60V, a collector current (Ic) of -1A, and a power dissipation of 12.5W. The device is available in a TO-126 package, which provides good thermal performance.

The BD667A's robust design and wide operating range make it a popular choice among electronics designers. It's widely used in linear amplifiers and switching applications requiring moderate power handling capability. The availability of a complementary NPN transistor simplifies circuit design and allows for efficient push-pull amplifier configurations.