BZX585-B51,115 vs BZX585-B24,115
| Part Number |
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| Category | Diodes - Zener - Single | Diodes - Zener - Single |
| Manufacturer | National Semiconductor | Nexperia USA Inc. |
| Description | NOW NEXPERIA BZX585-B51 - ZENER | DIODE ZENER 24V 300MW SOD523 |
| Package | Bulk | Tape & Reel (TR) |
| Series | - | - |
| Operating Temperature | -65°C ~ 150°C | -65°C ~ 150°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | SC-79, SOD-523 | SC-79, SOD-523 |
| Supplier Device Package | SOD-523 | SOD-523 |
| Tolerance | ±2% | ±2% |
| Power - Max | 300 mW | 300 mW |
| Voltage - Forward (Vf) (Max) @ If | 1.1 V @ 100 mA | 1.1 V @ 100 mA |
| Current - Reverse Leakage @ Vr | 50 nA @ 35.7 V | 50 nA @ 16.8 V |
| Voltage - Zener (Nom) (Vz) | 51 V | 24 V |
| Impedance (Max) (Zzt) | 180 Ohms | 70 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. 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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3. Can 2 Zener diodes be connected in series?
Yes, two or more Zener diodes can be used in series to obtain higher stable voltage values. But pay attention to the power rating and heat dissipation of each diode.
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4. Where are Zener diodes used in real life?
Applied to power adapters, overvoltage protection in electronic devices, LED drive circuits, etc.
