The 2SA1744-K-AZ is a silicon PNP epitaxial planar transistor manufactured by Renesas Electronics America. It's designed for use in audio frequency amplifier and switching applications. This transistor is known for its high gain and low noise characteristics, making it well-suited for sensitive audio circuits.

Applications

• Audio Amplifiers (preamplifiers, headphone amplifiers)
• Switching circuits
• Low-noise amplifier stages
• General-purpose amplification

Features

• PNP Epitaxial Planar Transistor
• High DC Current Gain (hFE)
• Low Noise Figure
• Excellent Linearity
• Small signal amplification

Benefits

• Superior audio signal amplification with minimal added noise.
• Reliable switching performance due to fast switching speeds.
• High sensitivity in low-signal applications.
• Compact design due to small package size.
• Stable operation over a wide temperature range.

Specifications

Collector-Base Voltage (VCBO): -60V

Collector-Emitter Voltage (VCEO): -50V

Emitter-Base Voltage (VEBO): -5V

Collector Current (IC): -150mA

Collector Power Dissipation (PC): 400mW

DC Current Gain (hFE): 200 to 400 (for K rank)

Operating Junction Temperature (Tj): 150°C

Storage Temperature (Tstg): -55°C to +150°C

Package: SOT-23

The 2SA1744-K-AZ is packaged in a SOT-23 package for surface mounting. The 'K' in the part number denotes a specific hFE (DC Current Gain) range, indicating a higher gain compared to other variants. The 'AZ' likely signifies a particular production or quality control specification. It is an appropriate choice where small signal amplification and low noise are critical.