MMBZ5265C-HE3-18 vs BZX384C12-HE3-08
| Part Number |
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| Category | Diodes - Zener - Single | Diodes - Zener - Single |
| Manufacturer | Vishay Semiconductor - Diodes Division | Vishay Semiconductor - Diodes Division |
| Description | DIODE ZENER 62V 225MW SOT23-3 | DIODE ZENER 12V 200MW SOD323 |
| Package | Tape & Reel (TR) | Tape & Reel (TR) |
| Series | Automotive, AEC-Q101 | Automotive, AEC-Q101, BZX384 |
| Operating Temperature | -55°C ~ 150°C | -55°C ~ 150°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | TO-236-3, SC-59, SOT-23-3 | SC-76, SOD-323 |
| Supplier Device Package | SOT-23-3 | SOD-323 |
| Tolerance | ±2% | ±5% |
| Power - Max | 225 mW | 200 mW |
| Voltage - Forward (Vf) (Max) @ If | - | - |
| Current - Reverse Leakage @ Vr | 100 nA @ 47 V | 100 nA @ 8 V |
| Voltage - Zener (Nom) (Vz) | 62 V | 12 V |
| Impedance (Max) (Zzt) | 185 Ohms | 25 Ohms |
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1. What is the difference between a diode and a Zener diode?
While a normal diode is mainly used for unidirectional current flow, a Zener diode is designed to provide a stable voltage reference point when reverse biased. A normal diode conducts when forward biased and does not conduct or has only a small leakage current when reverse biased; a Zener diode can start conducting after reaching a specific reverse voltage (called the Zener voltage).
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2. How to tell if a diode is a Zener diode?
You can tell by looking at its symbol (which is slightly different from ordinary diodes), the description in the data sheet, or by testing its reverse characteristic curve. Using a multimeter, you can also measure its forward and reverse resistance values and the voltage drop under specific conditions.
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3. Is every diode a Zener diode?
No. Although all Zener diodes are a type of diode, not all diodes can be called Zener diodes.
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4. What happens when a Zener diode fails?
If it is overheated or subjected to excessive current, it may cause permanent damage, which will appear as an open or short circuit state.
