SS3P4LHM3_A/H vs SF45GHR0G
| Part Number |
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| Category | Diodes - Rectifiers - Single | Diodes - Rectifiers - Single |
| Manufacturer | Vishay Semiconductor - Diodes Division | Taiwan Semiconductor Corporation |
| Description | DIODE SCHOTTKY 40V 3A TO277A | DIODE GEN PURP 300V 4A DO201AD |
| Package | Tape & Reel (TR) | -Reel® |
| Series | Automotive, AEC-Q101 | Automotive, AEC-Q101 |
| Mounting Type | Surface Mount | Through Hole |
| Package / Case | TO-277, 3-PowerDFN | DO-201AD, Axial |
| Supplier Device Package | TO-277A (SMPC) | DO-201AD |
| Diode Type | Schottky | Standard |
| Current - Average Rectified (Io) | 3A | 4A |
| Voltage - Forward (Vf) (Max) @ If | 470 mV @ 3 A | 1.3 V @ 4 A |
| Current - Reverse Leakage @ Vr | 250 µA @ 40 V | 5 µA @ 300 V |
| Capacitance @ Vr, F | - | 80pF @ 4V, 1MHz |
| Voltage - DC Reverse (Vr) (Max) | 40 V | 300 V |
| Speed | Fast Recovery =< 500ns, > 200mA (Io) | Fast Recovery =< 500ns, > 200mA (Io) |
| Reverse Recovery Time (trr) | - | 35 ns |
| Operating Temperature - Junction | -55°C ~ 150°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 forward voltage drop?
Forward voltage drop refers to the voltage drop generated when the current passes through a diode when it is conducting. The forward voltage drop of silicon rectifier diodes is usually around 0.7V, while the forward voltage drop of Schottky diodes is usually lower, between 0.2V and 0.3V.
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3. What is the maximum reverse voltage (PIV) of a rectifier diode?
The Peak Inverse Voltage (PIV) is the maximum reverse voltage that a diode can withstand. When selecting a diode, the PIV must be higher than the maximum reverse voltage in the circuit, usually twice or more the input voltage.
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4. How to identify the polarity of a single rectifier diode?
Rectifying diodes usually have polarity markings, with the positive (anode) of the diode being "+" and the negative (cathode) being "-". On the packaging of diodes, there is usually a circular mark on the cathode side indicating the direction of the diode.
