BC857W

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BC857W

+Nomenclature

Bipolar Transistors - BJT

  • FabricantLe nexperia

  • Pièce fabricant #BC857W

  • En stock18269

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Présentation

Description

The BC857W is a PNP bipolar junction transistor commonly used in electronic circuits for amplification and switching applications. It is known for its small SOT-323 package, making it suitable for compact electronic designs. The transistor features a collector-emitter voltage (Vceo) rating of -45V and a collector current (Ic) of -100mA, which allows it to handle moderate power levels in various circuits.
Key characteristics of the BC857W include its low noise performance and high current gain, typically ranging from 110 to 800, depending on the variant (A, B, or C). This makes it ideal for applications requiring signal amplification with minimal distortion. Its maximum power dissipation is approximately 250mW, which should be considered when designing circuits to avoid overheating.
The BC857W is widely used in consumer electronics, automotive systems, and communication devices due to its reliability and efficiency. It is often employed in audio amplifiers, signal processing units, and digital electronics where small signal amplification is needed.

Equivalent

The BC857W is a surface-mount PNP bipolar junction transistor commonly used in general-purpose amplification and switching applications. Equivalent products include:
1. BC857 (through-hole version)
2. BC558
3. 2N3906
4. KSA1015
5. MMBT2907A (SMD version)
6. PZT2907A (higher power rating)
Ensure to check the specific package type and electrical characteristics to match your application requirements.

Features

The BC857W is a general-purpose PNP bipolar junction transistor (BJT) commonly used in electronic circuits. Key features include:
1. Transistor Type: PNP
2. Package: SOT-323 (also known as SC-70), which is a small surface-mount package ideal for compact designs.
3. Maximum Collector-Emitter Voltage (Vce): -45V
4. Maximum Collector Current (Ic): -100mA, suitable for low-power applications.
5. DC Current Gain (hFE): Typically ranges from 110 to 800, indicating good amplification capability.
6. Collector-Base Voltage (Vcbo): -50V
7. Emitter-Base Voltage (Vebo): -5V
8. Power Dissipation: Up to 150mW, allowing for usage in small signal amplification tasks.
9. Transition Frequency (fT): Approximately 100 MHz, making it suitable for high-frequency applications.
10. Operating Junction Temperature: -65°C to 150°C, providing a broad range for robust operating conditions.
These features make the BC857W ideal for switching and amplification in various small electronic devices, including portable gadgets and communication equipment.

Pinout

The BC857W is a general-purpose PNP bipolar junction transistor (BJT). It typically comes in a SOT323 surface-mount package, which is a small outline transistor with three pins. The pin configuration for the BC857W is as follows:
1. Pin 1 - Emitter (E)
2. Pin 2 - Base (B)
3. Pin 3 - Collector (C)
Functionally, the BC857W is used in switching and amplification applications. It is designed to handle low power and is commonly used in circuits requiring a small form factor. The transistor operates by allowing a small current injected into the base (B) to control a larger current flowing from the collector (C) to the emitter (E). As a PNP transistor, the BC857W is "on" when its base is at a lower voltage relative to the emitter. Its compact size makes it suitable for portable and space-constrained electronic devices.

Manufacturer

The BC857W is a PNP bipolar junction transistor (BJT) commonly used in electronic circuits. It is manufactured by several companies, including Nexperia and Infineon Technologies.
1. Nexperia: Nexperia is a global semiconductor manufacturer known for its expertise in producing discrete, logic, and MOSFET devices. The company was spun off from NXP Semiconductors in 2017 and has a strong focus on efficiency, quality, and manufacturing excellence. Nexperia's products are widely used in automotive, industrial, and consumer electronics applications.
2. Infineon Technologies: Infineon Technologies is a leading semiconductor manufacturer headquartered in Germany. The company specializes in automotive, industrial power control, power management and multimarket, and digital security solutions. Infineon's products are crucial in applications that require energy efficiency, mobility, and security.
Both companies are well-respected in the semiconductor industry and have a reputation for producing high-quality electronic components used in various applications.

Application

The BC857W is a general-purpose PNP bipolar junction transistor commonly used in various electronic applications. Its main application areas include signal amplification, where it is used in audio amplifiers, preamplifiers, and other amplification circuits. It is also employed in switching applications, such as in relay drivers and other low-power switching circuits. Additionally, the BC857W is used in voltage regulation and stabilization circuits. Its compact SMD (Surface Mount Device) package makes it suitable for use in compact and portable electronic devices, including consumer electronics, automotive electronics, and communication equipment. Its reliability and versatility make it a popular choice in many electronic design applications.

Package

The BC857W is a PNP bipolar junction transistor housed in a SOT-323 (SC-70) surface-mount package. This small outline transistor package is commonly used in compact electronic devices due to its minimal size and efficient performance.