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BF459 Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
BF459PHI/ST315Yes

BF459 is a high-voltage NPN transistor manufactured by PHI/ST (Philips/SGS-Thomson).

The BF459 is a high-voltage NPN transistor manufactured by PHI/ST (Philips/SGS-Thomson). Below are its key specifications, descriptions, and features:

Specifications:

  • Transistor Type: NPN
  • Collector-Emitter Voltage (VCE): 400V
  • Collector-Base Voltage (VCB): 400V
  • Emitter-Base Voltage (VEB): 5V
  • Collector Current (IC): 100mA
  • Power Dissipation (Ptot): 800mW
  • Transition Frequency (fT): 50MHz
  • DC Current Gain (hFE): 25 to 250
  • Operating Temperature Range: -55°C to +150°C

Description:

The BF459 is a high-voltage NPN transistor designed for applications requiring medium power and high voltage handling. It is commonly used in switching and amplification circuits, particularly in CRT displays, power supplies, and high-voltage regulators.

Features:

  • High collector-emitter voltage (400V)
  • Medium current capability (100mA)
  • Suitable for high-voltage switching applications
  • Low noise performance
  • TO-92 package for easy mounting

This transistor is often used in conjunction with complementary PNP transistors (e.g., BF458) in push-pull configurations.

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