Description

BC557 is a general-purpose transistor, used like an amplifier or a switch in electronic circuits. Its hFE ratings of this transistor range from 125 to 800 to make the transistor ideal by using like an amplifier within electronic circuits like audio signal amplification. These ratings can be determined through the final letter after its digit. The highest collector dissipation is 500 milliwatt.

When this transistor is used as a switch for below 100mA loads then it works well. The value of VCE for this transistor is good like -45V. This collector to emitter terminal voltage is used within circuits which require 40V to 45V DC.

BC557 Transistor Pin Configuration

The pin configuration of the BC557 transistor is shown below and each pin and its functionality is discussed below. This transistor includes three terminals like a normal transistor namely base, emitter & collector. The BC557 transistor symbol is shown below.
 

• Pin1 (Collector): The current supplies throughout the collector terminal
• Pin2 (Base): The base terminal of this transistor controls the biasing
• Pin3 (Emitter): Flow of current drains out through this terminal

Features & Specifications

The features and specifications of the BC557 transistor include the following.

• The type of package is T092
• The type of transistor is PNP
• Collector Current (IC) Max is -100mA
• Max Operating & Storage Temperature ranges from -65 to +150 degree centigrade
• Collector-Emitter Voltage or VCE Max is -45V
• DC current gain Max or Min (hFE) is 125 – 800
• Collector Base Voltage or VCB Max is-50V
• Max fT or Transition Frequency is 100 MHz
• Emitter-Base Voltage or VBE Max is -5V
• Collector Dissipation or Pc Max is 500 mW
• Peak Collector Current (Icm) is 200mA
• Junction Temperature (Tstg) is 150 Centigrade
• Process technology used in this transistor is advanced
• The error voltage is less
• Switching speed is very quick
• Complete voltage operation
• Handling capability of current & power is high