BZX585-B51,115 vs BZX585-B39,115
| 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 39V 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 @ 27.3 V |
| Voltage - Zener (Nom) (Vz) | 51 V | 39 V |
| Impedance (Max) (Zzt) | 180 Ohms | 130 Ohms |
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1. 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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2. 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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3. 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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4. Where are Zener diodes used in real life?
Applied to power adapters, overvoltage protection in electronic devices, LED drive circuits, etc.
