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BC817-25
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BC817-25 Description
BC817-25 Description
The BC817-25 from Diotec Semiconductor is an NPN bipolar junction transistor (BJT) designed for high-performance switching and amplification in compact surface-mount applications. Packaged in SOT23-3, it offers a robust 45V collector-emitter breakdown voltage (VCE) and a maximum collector current (IC) of 800mA, making it suitable for medium-power circuits. With a transition frequency of 100MHz, it ensures efficient high-frequency operation. The device is RoHS non-compliant and carries an ECCN EAR99 classification, indicating unrestricted export control.
BC817-25 Features
- High Current Handling: Supports up to 800mA IC, ideal for driver stages and load switching.
- Low Saturation Voltage: 700mV max @ 50mA base current (IB) and 500mA IC, minimizing power loss in saturated switching.
- High DC Current Gain (hFE): 160 (min) @ 100mA, 1V, ensuring strong signal amplification.
- Surface-Mount Design: SOT23-3 package enables compact PCB layouts, suitable for space-constrained designs.
- Wide Operating Range: -55°C to +150°C junction temperature tolerance for robust performance in varied environments.
BC817-25 Applications
- Switching Circuits: Relay drivers, LED drivers, and power management due to low VCE(sat).
- Amplification: Audio preamps, signal conditioning, and sensor interfaces leveraging high hFE.
- Portable Electronics: Battery-operated devices benefiting from its 310mW power dissipation and small footprint.
- Automotive Modules: Non-critical subsystems where 45V breakdown voltage provides sufficient headroom.
Conclusion of BC817-25
The BC817-25 excels in high-efficiency switching and amplification with its low saturation voltage, high gain, and compact form factor. While it lacks RoHS compliance, its 100MHz bandwidth and 800mA current rating make it a versatile choice for industrial, consumer, and automotive electronics. Engineers will appreciate its balance of performance and cost-effectiveness in medium-power analog and digital designs.



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