GDZ12B-HG3-08 vs ZM4751A-GS08
| 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 12V 200MW SOD323 | DIODE ZENER 30V 1W DO213AB |
| Package | Tape & Reel (TR) | Tape & Reel (TR) |
| Series | Automotive, AEC-Q101, GDZ-G | Automotive, AEC-Q101 |
| Operating Temperature | -65°C ~ 150°C | 175°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | SC-76, SOD-323 | DO-213AB, MELF (Glass) |
| Supplier Device Package | SOD-323 | DO-213AB |
| Tolerance | ±2% | ±5% |
| Power - Max | 200 mW | 1 W |
| Voltage - Forward (Vf) (Max) @ If | - | - |
| Current - Reverse Leakage @ Vr | 100 nA @ 9 V | 5 µA @ 22.8 V |
| Voltage - Zener (Nom) (Vz) | 12 V | 30 V |
| Impedance (Max) (Zzt) | 30 Ohms | 40 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. What are Zener diodes used for?
They are mainly used for voltage regulation, protecting circuits from overvoltage damage, and as a voltage reference source.
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3. Are Zener diodes unidirectional?
In normal operation mode, Zener diodes do exhibit unidirectional conductivity, but they start conducting when reverse biased to their Zener voltage.
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4. What is the difference between a Zener diode and a Schottky diode?
Schottky diodes have a low forward voltage drop and fast switching speed, making them suitable for high-frequency applications. In contrast, Zener diodes are mainly used for voltage regulation and voltage stabilization.
