The 2N2907A is a PNP bipolar junction transistor produced by CDIL. It is suitable for general purpose amplification and switching circuits. It consists of three layers of semiconductor material and has an emitter, base, and collector configuration. It can handle currents up to 800mA and can switch frequencies up to 1MHz. It features low saturation voltage, high current gain, and a wide range of operating temperatures. It is available in TO-92, SOT-23 and TO-126 packages. This transistor is typically used in radio frequency, audio, and switching circuits.