Posted on Leave a comment

S8550 Transistor Introduction

The UTC S8550 is a low voltage high current small signal PNP transistor, designed for Class B push-pull audio amplifier and general purpose applications.

What is S8550 transistor

S8550 is a PNP transistor, so when the base pin is grounded, the collector and emitter will remain open (reverse bias); when the signal is provided to the base pin, the collector and emitter will be closed (forward bias). The maximum gain value is 300; the maximum gain value is 300. This value usually determines the amplification capacity of the transistor s8550. Because it is very high, it is usually used for amplification purposes.

When the transistor is fully biased, it allows a maximum current of 700mA to flow through the collector and emitter. This stage is called saturation zone, and the typical voltage allowed for cross collector emitter (VCE) or collector base (VCB) is 20V and 30V respectively. When the base current is removed, the transistor is completely cut off, which is called the cut-off region.

S8550 datasheet

S8550 Pinout &Configuration

S8550 has three terminals, as shown in the table.

Pin NumberPin NameDescription
1EmitterCurrent Drains out through emitter, normally connected to ground
2BaseControls the biasing of transistor, Used to turn ON or OFF the transistor
3CollectorCurrent flows in through collector, normally connected to load
S8550 Pinout &Configuration

S8550 Features

  1. Package Type: TO-92
  2. Transistor Type: PNP
  3. Max Collector Current(IC): -0.7A or -700mA
  4. Max Collector-Emitter Voltage (VCE): -20V
  5. Max Collector-Base Voltage (VCB): -30V
  6. Max Emitter-Base Voltage (VBE): -5V
  7. Max Collector Dissipation (Pc): 1 Watt
  8. Max Transition Frequency (fT): 100 MHz
  9. Minimum & Maximum DC Current Gain (hFE): 40 To 400
  10. Max Storage & Operating temperature Should be: -65 to +150Centigrade

S8550 equivalent transistor

  • The S8550 equivalent transistors are: BC527, KSA708, MPS750
  • The S8550 pnp complementary is: BC557, 2N3906, A1015, 2SA1943, BD140

How does a S8550 transistor work?

S8550 is a PNP transistor, so when the base pin is grounded, the collector and emitter will remain open (reverse bias); when the signal is provided to the base pin, the collector and emitter will be closed (forward bias). The maximum gain value is 300; the maximum gain value is 300. This value usually determines the amplification capacity of the transistor s8550. Because it is very high, it is usually used for amplification purposes.

When the transistor is fully biased, it allows a maximum current of 700mA to flow through the collector and emitter. This stage is called saturation zone, and the typical voltage allowed for cross collector emitter (VCE) or collector base (VCB) is 20V and 30V respectively. When the base current is removed, the transistor is completely cut off, which is called the cut-off region.

S8550 is a general-purpose transistor, so you can use it at the output end of the audio amplifier circuit to amplify the output audio signal to 1 watt. For example, it can be used for the output of electronic doorbell circuit, MP3 audio amplifier and buzzer circuit.

If you want to use it as a switch, you can easily drive large relays, many small LEDs at a time, and one or two 10 to 20 Watt high-power LEDs, turn on another part or application in an electronic project / circuit, and so on. In addition, it can replace or replace many other general-purpose transistors, and it is also an ideal transistor used in amateur electronic projects, so transistors must be available in electronic laboratories.

C1815 Circuit

S8550-Circuit-Diagram
S8550-Circuit-Diagram

C1815 Applications

  • Audio Amplification Circuits
  • Class B Amplifiers
  • Push pull Transistors
  • Circuits where high gain is required
  • Low signal applications

That’s all for today. Hope you enjoyed this article. However, if you have doubts or have any questions about this, you can contact me in the comments section below. I’ll be happy to help you as best I can. Let us know your feedback and suggestions at any time, they allow us to provide you with high-quality work that responds to your needs and expectations, and helps you continue to give back to our products. Thank you for reading this article.

Advertisements
Leave a Reply

Your email address will not be published.