S8550 2TY SMD Transistor PNP 25V 500mA 300mW Surface Mount
The S8550 (2TY) is a compact PNP silicon transistor in an SOT-23 package, rated for 25 V and 500 mA. It features low saturation voltage, high gain, and fast switching, making it ideal for LED driving, signal amplification, and low-voltage switching in compact consumer and industrial electronic circuits.
الترانزستور S8550 (2TY) من نوع PNP مصنوع من السيليكون ومغلف بحزمة SOT-23، يعمل بجهد 25 فولت وتيار 500 مللي أمبير. يتميز بجهد تشبع منخفض وكسب عالٍ وسرعة تبديل مرتفعة، مما يجعله مثاليًا لتشغيل الـLED وتكبير الإشارات والتبديل في الدوائر الإلكترونية الصغيرة.
The S8550 (2TY) is a PNP silicon epitaxial transistor designed for low-voltage, medium-current switching and amplification. Housed in a compact SOT-23 surface-mount package, it saves PCB space while maintaining excellent performance for portable and embedded applications.
It supports a collector current (Ic) of up to 500 mA and a collector-emitter voltage (Vceo) of 25 V (some datasheets specify up to 40 V). With a low saturation voltage (VCE(sat)), the S8550 minimizes power dissipation, improving circuit efficiency. The transistor’s DC gain (hFE) ranges from 30 to 800, depending on classification, ensuring flexibility for both switching and amplification designs.
Its transition frequency (fT ≥ 150 MHz) allows it to perform reliably in high-frequency and fast-switching applications. The 300 mW power dissipation rating ensures durability and long-term reliability under normal operating temperatures (up to 150 °C junction temperature).
Applications include: driving LEDs, controlling relays, amplifying audio or signal stages, and performing level-shifting or logic interface functions in compact systems such as mobile devices, cameras, and audio electronics.
| Parameter | Value |
|---|---|
| Transistor Type | PNP Silicon Epitaxial |
| Collector-Base Voltage (Vcbo) | 40 V |
| Collector-Emitter Voltage (Vceo) | 25 V |
| Emitter-Base Voltage (Vebo) | 5 V |
| Continuous Collector Current (Ic) | 500 mA |
| Power Dissipation (Pd) | 300 mW |
| DC Current Gain (hFE) | 30 – 800 |
| Transition Frequency (fT) | ≥ 150 MHz |
| Junction Temperature (Tj) | Max 150 °C |
| Package Type | SOT-23 (Surface Mount) |
| Marking Code | 2TY |
| Dimensions | 2.9 × 1.3 × 1.0 mm |
| Mounting | SMT/SMD, RoHS Compliant |
Typical Applications
Switching Circuits: Drives relays, solenoids, and LEDs up to 500 mA
Audio Amplifiers: Used in pre-amp and driver stages
Logic Interfaces: Converts logic-level signals to higher current outputs
Voltage Regulators: Acts as a pass element in simple regulators
Consumer Devices: Common in phones, cameras, and portable electronics