The CMPT491E is a PNP silicon epitaxial planar transistor manufactured by Central Semiconductor Corp. It is designed for low-noise amplifier applications and general-purpose switching and amplification. The device is housed in a small SOT-23 package, making it suitable for high-density circuit board assemblies.

Applications:

• Low-noise amplifiers (LNA)
• General-purpose amplification
• Switching circuits
• Audio amplification
• Driver stages

Features:

• Low noise figure: Ideal for low-noise amplifier applications.
• High gain: Provides significant signal amplification.
• Small SOT-23 package: Suitable for space-constrained applications.
• High breakdown voltage: Ensures reliable operation.
• RoHS compliant: Environmentally friendly.

Benefits:

• Improved signal quality in low-noise amplifier applications due to the low noise figure.
• Effective signal amplification due to the high gain.
• Reduced board space requirements due to the small package size.
• Reliable operation in various circuit conditions due to the high breakdown voltage.
• Environmentally compliant.

Additional Details:

The CMPT491E features a collector-emitter voltage (VCEO) of -40V and a collector current (IC) of -200mA. The typical noise figure is 2dB, making it well-suited for low-noise amplifier applications. The current gain (hFE) typically ranges from 100 to 300. The device operates over a temperature range of -65°C to +150°C. It's designed for automated surface mount assembly and widely utilized in communication equipment, audio systems, and other applications requiring low-noise amplification.