CMDD4448 TR vs SK3200B-LTP
| Part Number |
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| Category | Diodes - Rectifiers - Single | Diodes - Rectifiers - Single |
| Manufacturer | Central Semiconductor Corp | Micro Commercial Co |
| Description | DIODE GEN PURP 75V 250MA SOD323 | DIODE SCHOTTKY 200V 3A DO214AA |
| Package | SC-76, SOD-323 | Tape & Reel (TR) |
| Series | - | - |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | SC-76, SOD-323 | DO-214AA, SMB |
| Supplier Device Package | SOD-323 | DO-214AA (SMB) |
| Diode Type | Standard | Schottky |
| Current - Average Rectified (Io) | 250mA | 3A |
| Voltage - Forward (Vf) (Max) @ If | 1V @ 100mA | 860 mV @ 3 A |
| Current - Reverse Leakage @ Vr | 25nA @ 20V | 500 µA @ 200 V |
| Capacitance @ Vr, F | 4pF @ 0V, 1MHz | - |
| Voltage - DC Reverse (Vr) (Max) | 75V | 200 V |
| Speed | Fast Recovery =< 500ns, > 200mA (Io) | Fast Recovery =< 500ns, > 200mA (Io) |
| Reverse Recovery Time (trr) | 4ns | - |
| Operating Temperature - Junction | -65°C ~ 175°C | -55°C ~ 150°C |
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1. How to choose the appropriate rectifier diode?
When making a choice, the following factors need to be considered:
Current capacity: Determine the maximum current that the diode needs to handle.
Reverse voltage: Ensure that the reverse voltage of the diode can withstand the highest voltage in the circuit.
Forward voltage drop: A lower forward voltage drop can improve circuit efficiency.
Recovery time: For high-frequency applications, choose fast recovery or Schottky diodes. -
2. What is the difference between Schottky diodes and traditional silicon rectifier diodes?
Schottky diodes have a lower forward voltage drop (typically 0.2V to 0.3V) and faster switching speed, making them suitable for high-frequency applications. However, their reverse voltage is relatively low and is typically used in circuits with lower voltages.
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3. How to determine if the rectifier diode is damaged?
Use a multimeter to measure the forward and reverse resistance of a diode. If the diode exhibits low impedance or high impedance in both directions, it may have been damaged. Under normal circumstances, there should be low impedance when conducting in the forward direction, and high impedance when conducting in the reverse direction.
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4. What are the packaging types of rectifier diodes?
There are various packaging types for rectifier diodes, including axial pin packaging (such as DO-41), surface mount packaging (such as SMA, SMB), and high-power packaging (such as TO-220). When selecting, the appropriate packaging should be chosen based on the application's heat dissipation requirements and installation method.
