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Transistor PNP S8550

Transistor PNP S8550

The S8550 is a widely used low-cost PNP transistor similar to the S8050 (its NPN alternative). It is reliable, versatile, and commonly found in both hobbyist projects and commercial electronic appliances. Designed for audio amplification and general-purpose use, the S8550 offers excellent performance in a small TO-92 package. With an output dissipation of 1 watt, it is well-suited for amplifying audio signals up to 1 watt as well as for other audio amplification stages. Additionally, with a maximum collector current of -700mA and a gain up to 400, it is suitable for a wide range of switching and amplification applications.
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1.05 AED Tax Included

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Specifications

  • Package Type: TO-92
  • Transistor Type: PNP
  • Max Collector Current (IC): -0.7A or -700mA
  • Max Collector-Emitter Voltage (VCE): -20V
  • Max Collector-Base Voltage (VCB): -30V
  • Max Emitter-Base Voltage (VBE): -5V
  • Max Collector Dissipation (Pc): 1 Watt
  • Max Transition Frequency (fT): 100 MHz
  • DC Current Gain (hFE): 40 to 400
  • Storage & Operating Temperature: -65°C to +150°C

Usage

The S8550 is a general-purpose PNP transistor suitable for both amplification and switching. It can be used in the output stages of audio amplifier circuits, electronic doorbells, MP3 amplifiers, and buzzer circuits. As a switch, it can drive relays, multiple LEDs, or even high-power LEDs (10W–20W). It is also a reliable alternative to many general-purpose transistors and is highly recommended for electronics labs and hobby projects.

Applications

  • Class B amplifiers
  • Driving loads under -700mA
  • Switching in electronic circuits
  • Amplifying low-gain signals
  • Output stages of small audio projects

Safe Operating Guidelines

To ensure long-term reliability, do not exceed a collector-emitter voltage of -20V or a collector current of -700mA. Always use a proper base resistor to limit current, and operate within the safe temperature range of -65°C to +150°C. Following these precautions will help the transistor perform efficiently and reliably in circuits.