The BUT72 is a silicon NPN power transistor designed for high-speed switching applications. Manufactured by Seme LAB, it was commonly used in inverters, converters, and power amplifiers where efficient switching and high voltage/current handling are required. While now categorized as END-OF-LIFE, understanding its specifications remains relevant for legacy system maintenance.

Applications

• Switch-mode power supplies (SMPS)
• Inverters and converters
• Motor control circuits
• High-frequency switching applications
• Power amplifiers

Features

• High Collector-Emitter Voltage (VCEO)
• High Collector Current (IC) capability
• Fast switching speed
• Low saturation voltage
• High power dissipation capability

Benefits

• Enables efficient switching in power supplies and converters.
• Reduces switching losses due to fast switching speeds.
• Provides reliable performance in high-voltage and high-current applications.
• Minimizes power dissipation due to low saturation voltage.
• Suitable for driving inductive loads due to its high current handling capability.

Additional Details

The BUT72's typical specifications include a Collector-Emitter Voltage (VCEO) of around 400V, a Collector Current (IC) of up to 10A, and a Power Dissipation (PD) of approximately 80W. Its switching speeds are typically in the microsecond range. It is generally packaged in a TO-220 or similar through-hole package. Because it's an END-OF-LIFE product, consult datasheets for precise characteristics and consider modern alternatives for new designs. Its high voltage and current ratings make it suitable for demanding power applications, while the fast switching speed contributes to efficient energy conversion.