S8550 PNP Transistor, TO-92

The S8550 is a general-purpose bipolar PNP transistor commonly used in both switching and amplifying applications. Its collector-emitter connection stays closed until a base voltage is applied, at which point the path opens, a behaviour that makes it especially useful in push-pull configurations within Class B amplifier designs.

With a maximum current gain of 300, a continuous collector current rating of 500mA and a collector-emitter voltage of 30V, the S8550 delivers reliable performance in audio amplification and other applications requiring high gain from a compact TO-92 package.

• Transistor type – PNP, general purpose
• Continuous collector current – 500mA
• Collector-Emitter voltage – 30V
• Base trigger voltage – 5V
• Current gain – 300 (max)
• Package – TO-92
• Typical applications – Audio amplification circuits, high-gain circuits, low-signal applications
• Configuration use – Class B amplifiers, push-pull transistor pairs

Its combination of high gain and reliable switching behaviour makes the S8550 particularly well suited to push-pull output stages and other audio amplification designs. The S8550 PNP Transistor is a solid choice for hobbyists building amplifier circuits and general low-signal applications.