High Voltage Transistors BUX 86 and BUX 87 – Specifications

Introduction

The Bux 86 and BUX 87 are typically high voltage switching transistors with silicon epibase. They come in TO-126 package and are NPN types.

These devices are especially known for their outstanding short switching characteristics and for having a high dielectric strength.

The main applications using these devices can be found with TV circuits, electronic ballasts, converters, SMPS power suppliers etc.

Technical Specifications and Electrical Tolerances

• The maximum tolerable electrical parameters for BUX 86 and BUX 87 may be understood with the following points:
• Maximum collector to emitter voltage for BUX 86 is 400 volts and 450 Volts for BUX 87.
• Maximum tolerable collector current for is 500 mA for both the devices. 
• Maximum tolerable instantaneous peak current across collector and emitter is 1 Amp for <2 ms for both the devices
• Maximum tolerable constant base current is 200 mA for both the devices.
• Maximum peak instantaneous base tolerable current is 300 mA for both the devices.
• Maximum power dissipation must not exceed 20 watts for both the devices
• Typical Static characteristics @ 25 degree ambient temperature of BUX 86 and BUX 87 transistors are listed below:
• Collector cut-off current is <0.1 mA
• Typical forward current gain for both the devices is around 50
• Collector to emitter saturation voltage is less than 1.5 V @ 100 mA collector current and 10 mA base current.
• Base to emitter saturation voltage is less than 1 volts @ 200 mA collector current and 20 mA base current.
• Maximum frequency handling capacity is 20 MHz for both the devices
• Turn ON switching speed is 0.25 micro-second.