SMAJ4743A-TP vs 1SMB5948B-13
| Part Number |
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| Category | Diodes - Zener - Single | Diodes - Zener - Single |
| Manufacturer | Micro Commercial Co | Diodes Incorporated |
| Description | DIODE ZENER 13V 1W DO214AC | DIODE ZENER 91V 3W SMB |
| Package | Tape & Reel (TR) | -Reel® |
| Series | - | - |
| Operating Temperature | -65°C ~ 150°C | -65°C ~ 150°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | DO-214AC, SMA | DO-214AA, SMB |
| Supplier Device Package | DO-214AC (SMA) | SMB |
| Tolerance | ±5% | ±5% |
| Power - Max | 1 W | 3 W |
| Voltage - Forward (Vf) (Max) @ If | 1.2 V @ 100 mA | 1.5 V @ 200 mA |
| Current - Reverse Leakage @ Vr | 5 µA @ 9.9 V | 1 µA @ 69.2 V |
| Voltage - Zener (Nom) (Vz) | 13 V | 91 V |
| Impedance (Max) (Zzt) | 10 Ohms | 200 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. 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. What are the special uses of Zener diodes?
Special uses include precision voltage references, overvoltage protection circuits, etc.
