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Original Part

Bipolar (BJT) Transistor PNP 45 V 100 mA 200MHz 330 mW Surface Mount SOT-23

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Alternative Part

Bipolar (BJT) Transistor PNP 45 V 100 mA 100MHz 250 mW Surface Mount SOT-23-3 (TO-236)

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Substitution Feasibility Conclusion

In most general-purpose low-frequency and low-to-medium power applications, Diotec's BC857C can serve as a substitute for Panjit's BC857C_R1_00001. However, for high-frequency applications or designs with limited thermal margin, reevaluation is recommended.

Comparison Points

1. Power Dissipation (Max): Panjit specifies 330 mW, while Diotec is rated at 250 mW. The Panjit variant supports higher power dissipation, offering better reliability in poor thermal environments or when driving heavier loads. 2. Transition Frequency: Panjit offers 200 MHz compared to Diotec’s 100 MHz. The Panjit version exhibits superior high-frequency performance, making it more suitable for amplification or switching applications above 100 MHz, whereas the Diotec part may experience degraded performance beyond this frequency. 3. Lower Operating Temperature: Panjit is rated down to –50°C, while Diotec extends to –55°C. Diotec holds a slight advantage in extreme low-temperature conditions, though this difference is negligible for most industrial-grade applications. 4. Price and Manufacturer: Diotec is priced approximately 31% lower. However, factors such as manufacturer reputation, supply chain stability, and long-term reliability should be considered. As an established brand, Panjit may provide tighter consistency control and proven field performance.
Analysis ID: 6A15-8AF1000
Based on part parameters and for reference only. Not to be used for procurement or production.
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