Micro Commercial Components (MCC)

BC817-25

BC817-25 Description

The BC817-25 from Micro Commercial Components (MCC) is a general-purpose NPN bipolar junction transistor (BJT) designed for small-signal amplification and switching applications. Packaged in a compact 3-pin SOT-23 surface-mount form factor, it offers a maximum collector-emitter voltage (V_CE) of 45V and a collector current (I_C) rating of 0.5A, making it suitable for low-to-medium power circuits. With a power dissipation capability of 310mW and an operating temperature range up to 150°C, this transistor balances efficiency and thermal performance. Its high transition frequency (f_T ≥ 100MHz) ensures reliable performance in high-frequency applications.

BC817-25 Features

• High DC Current Gain: Minimum h_FE of 100@300mA and 160@100mA, ensuring strong signal amplification.
• Low Saturation Voltage: V_CE(sat) ≤ 0.7V@50mA, reducing power loss in switching applications.
• Compact SOT-23 Package: Ideal for space-constrained PCB designs (dimensions: 3.04×1.4×1.1mm max).
• Wide Voltage Tolerance: Supports V_BE up to 5V and V_CE up to 45V, enhancing versatility.
• Surface-Mount Compatibility: Facilitates automated assembly processes.

BC817-25 Applications

• Signal Amplification: Audio preamps, sensor interfaces, and RF stages due to high gain and frequency response.
• Switching Circuits: Relay drivers, LED controllers, and logic-level converters leveraging low saturation voltage.
• Portable Electronics: Battery-operated devices where compact size and efficiency are critical.
• Automotive & Industrial Systems: Non-automotive environments requiring robust performance under thermal stress.

Conclusion of BC817-25

The BC817-25 excels in low-power amplification and switching with its high gain, low saturation voltage, and compact SOT-23 package. While not RoHS-compliant, its reliability, thermal stability, and broad voltage range make it a preferred choice for consumer electronics, industrial controls, and communication systems. Engineers favor this model for its cost-effectiveness and performance consistency in demanding applications.