5pcs ss14 1n5819 smd diode

🔹 5PCS SS14 / 1N5819 – 1A 40V Schottky Barrier Rectifier Diode (SMB/DO-214AA)

A high-efficiency, surface-mount Schottky diode with a very low forward voltage drop and fast switching characteristics. The SS14 (or its through-hole equivalent 1N5819) is designed for low-voltage, high-current applications where minimizing power loss and heat generation is critical. Ideal for modern, compact power circuits.

✅ Specifications:

• Part Number: SS14 (SMD) / 1N5819 (Through-Hole Equivalent)

• Type: Schottky Barrier Rectifier Diode

• Max Repetitive Reverse Voltage (VRRM): 40V

• Max Average Forward Rectified Current (IO): 1A

• Peak Forward Surge Current (IFSM): 25A (8.3ms single half-sine wave)

• Forward Voltage (VF): ~0.45V (Typical at 1A) – Key Low-Loss Feature

• Reverse Recovery Time (trr): Negligible (Schottky Characteristic)

• Package: SMB / DO-214AA (Surface Mount) for SS14

• Mounting Type: SMD (Surface Mount Device)

• Operating Junction Temperature: -65°C to +125°C

• Quantity: 5 pieces

⚙️ Key Features:

• Ultra-Low Forward Voltage: Typical 0.45V at 1A (vs. ~1V for standard silicon diodes), dramatically reducing conduction losses and heat.

• Very Fast Switching: As a Schottky diode, it has essentially no reverse recovery charge (trr), making it perfect for high-frequency switching circuits.

• Compact SMD Design: The SMB package saves significant board space compared to through-hole parts.

• Efficient & Cool Operation: Lower power dissipation allows for more compact designs with minimal heatsinking.

• High Current Density: The SMB package is designed to handle 1A continuous current when properly soldered to a PCB.

📦 Typical Applications:

• Switch-Mode Power Supplies (SMPS): As the output rectifier in low-voltage DC-DC converters (buck, boost) for 3.3V, 5V, and 12V rails.

• Reverse Polarity Protection: Excellent for battery-powered devices and input stages due to low voltage drop, maximizing usable voltage.

• Freewheeling / Clamping Diodes: In synchronous and non-synchronous buck converters, motor drives, and relay circuits.

• Solar Panel & Battery Circuits: Used as a blocking diode to prevent reverse current flow with minimal loss.

• General Power Management: Any circuit requiring efficient rectification or steering of currents up to 1A.

🔧 Polarity & Mounting Notes:

• Polarity Identification: On the SMB (DO-214AA) package, the cathode is marked with a white line or stripe on one end of the component body.

• PCB Footprint: Requires an SMB-compatible PCB pad layout. Ensure correct orientation during placement.

• Heatsinking (Thermal Management): For continuous operation near 1A, the diode must be soldered to a sufficient PCB copper pad/plane that acts as a heatsink. Inadequate thermal design will lead to overheating.

⚠️ Important Considerations:

• Reverse Leakage: Schottky diodes have higher reverse leakage current than PN junction diodes, especially at high temperatures. This can be a consideration in very high-precision or high-temperature circuits.

• Voltage Rating: The 40V rating is suitable for most low-voltage power applications (e.g., 5V, 12V, 24V systems). For higher voltages, use SS24 (40V/2A) or SS34 (40V/3A).

• Not a Zener: This is a rectifier Schottky diode, not for voltage regulation.

• Replacement: A direct, efficient upgrade for 1N400x series diodes in low-voltage switching circuits.