الترانزستور S8550 PNP

S8550 Pinout Configuration

سمات

• Low Voltage, High Current PNP Transistor
• تيار المجمع المستمر (IC) هو 500 مللي أمبير
• Collector-Emitter voltage (VCEO) is -25 V
• Collector-Base voltage (VCB0) is -40V
• Emitter Base Voltage (VBE0) is -5V
• Current Gain (hFE), 85 to 300
• Commonly used as Class B Push-pull transistors
• متوفر في حزمة To-92

Note: Complete Technical Details can be found at the S8550 transistor datasheet given at the end of this article.

Complementary NPN Transistor for S8550

S8050

S8550 Equivalent Transistor

BC527, KSA708, MPS750

Alternative PNP Transistors

BC557, 2N3906, A1015, 2SA1943, BD140

Brief Description on S8550 Transistor

S8550 هو PNP transistor hence the collector and emitter will be left open (Reverse biased) when the base pin is held at ground and will be closed (Forward biased) when a signal is provided to base pin. It has a maximum gain value of 300; this value determines the amplification capacity of the transistor normally S8550. Since it is very high it is normally used for amplification purposes.
When this transistor is fully biased then it can allow a maximum of 700mA to flow across the collector and emitter. This stage is called Saturation Region and the typical voltage allowed across the Collector-Emitter (V­CE) or Collector-Base (VCB) could be 20V and 30V respectively. When base current is removed the transistor becomes fully off, this stage is called as the Cut-off Region.

S8550 in Push-Pull Configuration

As mentioned in the features the S8550 transistor is commonly used in push pull configuration with Class B amplifier. So let us discuss how that is done.
A push pull amplifier, commonly known as Class B amplifier is type of multistage amplifier commonly used for audio amplification of loudspeakers. It is very simple to construct and requires two identical complimentary transistors operate. By complimentary it means that we need a NPN transistor and its equivalent PNP transistor. Like here the NPN transistor will be S8050 and its equivalent PNP transistor will be S8550. A simple circuit diagram of the Class B amplifier with the using the S8050 is shown below.

التطبيقات

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

نموذج ثنائي الأبعاد للمكون

إذا كنت تقوم بتصميم لوحة PCB أو لوحة الأداء مع هذا المكون، فإن الصورة التالية من S8550 Datasheet سيكون من المفيد معرفة نوع العبوة وأبعادها.