BC546-B – TBC

Overview

The onsemi BC546B is a general-purpose NPN bipolar junction transistor (BJT) designed for amplification and switching applications. Its critical operational characteristic lies in its moderate current handling capability (100 mA continuous collector current) and a respectable gain-bandwidth product of 300 MHz, making it suitable for audio frequency circuits and low-power RF preamplifiers. A key design consideration when utilizing the BC546B is managing its collector-emitter saturation voltage (Vce(sat)) of 300 mV; while acceptable for many linear applications, designers must account for this voltage drop in low-voltage switching circuits to ensure sufficient drive to the load.

Key Features

• NPN Bipolar Junction Transistor (BJT)
• Continuous Collector Current (Ic): 100 mA
• Collector-Emitter Voltage (Vceo): 65 V
• DC Current Gain (hFE): 200 (minimum)
• Gain Bandwidth Product (fT): 300 MHz
• TO-92-3 Through-Hole Package (5.33mm H x 5.2mm L x 4.19mm W)

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

• Low-frequency audio amplification stages
• General-purpose signal switching in control circuits
• Voltage-controlled oscillators (VCOs) in moderate frequency bands
• Driver stages for small relays and LEDs