2N2905

The 2N2905 is a silicon PNP bipolar junction transistor (BJT) designed for high-speed saturated switching and general-purpose amplifier applications. It comes in a TO-39 metal can package.
2N2905 PNP BJT Transistor TO-39 (60V, 0.6A) | Makers Electronics
Introduction to 2n2905 – The Engineering Projects
2N2905 PNP General Purpose Transistor – Datasheet
Key Specifications
According to various datasheets, the typical specifications for the 2N2905 transistor include:
Parameter Value Unit
Transistor Polarity PNP
Collector-Emitter Voltage (VCEO) -40 (up to -60V for ‘A’ variant) V
Collector Current (IC) Continuous -0.6 (600) A (mA)
Power Dissipation (Total) 0.6 W (at ambient temp); 3 W (at case temp) W
DC Current Gain (hFE) 30 to 300 (varies by test conditions)
Transition Frequency (fT) 200 MHz
Package Type TO-39 (metal can)
Operating Temperature -65 to +200 °C
Applications
The 2N2905 is a versatile component used in various electronic circuits:
High-speed switching applications due to its fast turn-off and low saturation voltage characteristics.
General purpose amplifier circuits.
Driver applications for industrial services.
Power management and signal processing.
Pinout
The 2N2905 in the standard TO-39 package has three pins with the following configuration when looking at the bottom of the device with the leads pointing down:
Pin 1: Emitter
Pin 2: Base
Pin 3: Collector
The metal case itself is also typically connected to the collector.