The FMMTA42 is a high voltage NPN transistor manufactured by Zetex Semiconductors (now Diodes Incorporated). It is designed for high voltage switching and amplification applications. Its primary advantage is its ability to handle high voltages in a small SOT23 package.

Applications

• High voltage switching
• Linear regulation
• Constant current sources
• Relay driving
• Lamp driving

Features

• High collector-emitter voltage (VCEO = 300V)
• Low saturation voltage
• High gain
• Small outline SOT23 package
• Lead-free finish

Benefits

• Enables switching and amplification in high voltage circuits
• Efficient operation with low saturation voltage
• Compact size allows for use in space-constrained applications
• High gain provides excellent signal amplification
• Environmentally friendly due to lead-free construction

Specifications

The FMMTA42 has a collector-emitter voltage (VCEO) of 300V, a collector-base voltage (VCBO) of 300V, and an emitter-base voltage (VEBO) of 6V. The continuous collector current (IC) is 500mA. The peak pulse current (ICM) is 1A. The power dissipation (Ptot) is 500mW. The DC current gain (hFE) is typically between 25 and 100. The operating and storage temperature range is -55°C to +150°C. The transistor is housed in a SOT23 package. The saturation voltage VCE(sat) is typically 0.3V at IC = 100mA.

Its high VCEO and low saturation voltage make it suitable for efficient high voltage switching and amplification circuits. The SOT23 package allows it to be used in space-constrained applications.