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Original Part

Zener Diode 7.5 V 200 mW ±2% Surface Mount SOD-323

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Alternative Part

Zener Diode 7.5 V 250 mW ±5% Surface Mount SOD-323

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Substitution Feasibility Conclusion

The device can serve as a substitute in non‑precision reference applications, but the performance impact of dynamic impedance and leakage current must be carefully evaluated. Bench verification is recommended before adoption.

Comparison Points

1. Dynamic Impedance (Zzt): CMDZ5236B exhibits 6Ω, significantly lower than the 30Ω of GDZ7V5B. Under varying load or input fluctuation conditions, CMDZ5236B provides better regulation and more stable output voltage. 2. Zener Voltage Tolerance: CMDZ5236B has a ±5% tolerance, which is wider than the ±2% of GDZ7V5B. In volume production, this will increase the dispersion of the system reference voltage and affect consistency. 3. Reverse Leakage Current: At similar test voltages, the leakage current of CMDZ5236B (on the order of µA) is one decade higher than that of GDZ7V5B (nA level). In low‑power, high‑impedance, or high‑temperature environments, this may raise quiescent power dissipation and compromise circuit stability. 4. Forward Voltage Drop: CMDZ5236B specifies its forward characteristic (Vf = 900mV @ 10mA), while GDZ7V5B does not provide this parameter. If the circuit may operate in forward‑bias mode (e.g., bidirectional clamping), compatibility with this parameter should be confirmed.
Analysis ID: F381-3AC7000
Based on part parameters and for reference only. Not to be used for procurement or production.
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