MMSZ5242B-13-F vs MMSZ5238B-13-F
| Part Number |
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| Category | Diodes - Zener - Single | Diodes - Zener - Single |
| Manufacturer | Diodes Incorporated | Diodes Incorporated |
| Description | DIODE ZENER 12V 370MW SOD123 | DIODE ZENER 8.7V 370MW SOD123 |
| Package | Tape & Reel (TR) | Tape & Reel (TR) |
| Series | - | - |
| Operating Temperature | -65°C ~ 150°C | -65°C ~ 105°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | SOD-123 | SOD-123 |
| Supplier Device Package | SOD-123 | SOD-123 |
| Tolerance | ±5% | ±5% |
| Power - Max | 370 mW | 370 mW |
| Voltage - Forward (Vf) (Max) @ If | 900 mV @ 10 mA | 900 mV @ 10 mA |
| Current - Reverse Leakage @ Vr | 1 µA @ 9.1 V | 3 µA @ 6.5 V |
| Voltage - Zener (Nom) (Vz) | 12 V | 8.7 V |
| Impedance (Max) (Zzt) | 30 Ohms | 8 Ohms |
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1. What are the two types of Zener diodes?
Zener diodes are mainly divided into two types: one that works based on the avalanche effect (usually in high voltage applications) and the other that works based on the Zener breakdown mechanism (suitable for lower voltages).
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2. 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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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.
