Taiwan Semiconductor

BC847A

BC847A Description

The BC847A from Taiwan Semiconductor Corporation is a high-performance NPN bipolar junction transistor (BJT) in a compact SOT-23 surface-mount package. Designed for general-purpose amplification and switching applications, it offers a collector-emitter voltage (Vce) rating of 45V and a collector current (Ic) capability of 100mA, making it suitable for low-power circuits. With a transition frequency of 100MHz, it ensures efficient high-frequency operation. The device exhibits excellent DC current gain (hFE ≥ 110 @ 2mA, 5V) and low saturation voltage (500mV @ 5mA, 100mA), enhancing energy efficiency in switching applications.

BC847A Features

• High Voltage Tolerance: 45V Vce breakdown voltage for robust performance in varied conditions.
• Low Leakage Current: Collector cutoff current as low as 100nA (ICBO), minimizing power loss.
• Compact & Reliable: SOT-23 package with 200mW power dissipation, ideal for space-constrained designs.
• RoHS3 & REACH Compliant: Environmentally friendly and suitable for global markets.
• Optimized Gain Linearity: Stable hFE across a wide range of operating conditions.

BC847A Applications

The BC847A excels in:

• Signal Amplification: Audio preamps, sensor interfaces, and RF stages due to its 100MHz bandwidth.
• Switching Circuits: Relay drivers, LED controllers, and logic-level shifting with low Vce(sat).
• Portable Electronics: Battery-powered devices leveraging its low leakage and efficiency.
• Automotive & Industrial Systems: Robust performance under moderate voltage/current demands.

Conclusion of BC847A

The BC847A stands out as a versatile, cost-effective NPN transistor, combining high-frequency capability, low power dissipation, and compact packaging. Its balance of gain, saturation voltage, and reliability makes it a preferred choice for designers seeking a drop-in solution for amplification and switching in consumer, industrial, and automotive applications. Taiwan Semiconductor’s adherence to ROHS3 and REACH standards further ensures compliance with modern environmental regulations.