BU205 NPN Power Transistor 700V 2.5A TO-3 Metal Package

BU205 NPN Power Transistor 700V 2.5A TO-3 Metal Package

The BU205 is a high-voltage NPN silicon power transistor designed for line output, horizontal deflection, and high-speed switching applications. With a collector-emitter voltage of 700V and a collector current of 2.5A, it offers excellent switching performance, high breakdown voltage, and robust thermal stability.

Encased in a TO-3 metal package, the BU205 provides superior heat dissipation and mechanical durability, making it ideal for television line output stages, SMPS (Switched-Mode Power Supplies), and high-voltage pulse circuits. Its high transition frequency and fast switching capability ensure efficient performance and minimal power loss, even in demanding high-voltage applications.

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Features:

• Transistor Type: NPN Silicon Power Transistor
• Package: TO-3 Metal Can (excellent heat dissipation and rugged reliability)
• Collector-Emitter Voltage (V_CE): 700V
• Collector Current (I_C): 2.5A
• Power Dissipation (P_tot): Up to 60W (with proper heatsink)
• Transition Frequency (f_T): Typically 4 MHz
• High Breakdown Voltage: Withstands high-voltage pulse operations
• Fast Switching Speed: Suitable for horizontal deflection and pulse circuits
• Rugged Construction: Ensures long service life under high load conditions
• High Thermal Conductivity: Metal TO-3 case for superior heat handling

Applications:

• Television Horizontal Output Stages: Designed for CRT deflection circuits
• Switch-Mode Power Supplies (SMPS): Used in high-voltage switching and power conversion
• High-Voltage Pulse Circuits: Suitable for pulse and driver applications
• Power Inverters and Converters: For efficient DC-AC or DC-DC conversion
• Industrial Power Circuits: Ideal for high-voltage switching and control
• Line Deflection Circuits: Common in older CRT-based video displays
• Educational and Hobby Electronics: Useful for high-voltage transistor experiments

bu205-transistor-datasheet