5PCS M2 1N4002 SMA SMD DIODE

🔹 5PCS M2 / 1N4002 – 1A 100V General Purpose Rectifier Diode (SMA/DO-214AC)

A surface-mount version of the classic 1N4002 general-purpose rectifier diode in the compact SMA package. Designed for low-frequency rectification, freewheeling, and reverse polarity protection in AC/DC power supplies and general circuit protection where through-hole mounting is not feasible.

✅ Specifications:

• Part Number: M2 (SMD code) / 1N4002 (Standard equivalent)

• Type: Standard Recovery Rectifier Diode

• Max Repetitive Reverse Voltage (VRRM): 100V

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

• Peak Forward Surge Current (IFSM): 30A (8.3ms single half-sine wave)

• Forward Voltage (VF): ~1.0V (Typical at 1A)

• Reverse Recovery Time (trr): ~2 µs (Standard recovery, for 50/60Hz)

• Package: SMA / DO-214AC (Surface Mount)

• Mounting Type: SMD (Surface Mount Device)

• Marking: M2 printed on diode body

• Operating Junction Temperature: -65°C to +150°C

• Quantity: 5 pieces

⚙️ Key Features:

• Compact SMD Design: Saves significant PCB space compared to through-hole DO-41 packages.

• Standard Recovery: Ideal for 50/60Hz line frequency rectification (bridge, center-tap).

• Robust & Reliable: Industry-standard silicon rectifier performance in a small package.

• High Surge Current: Can handle brief high-current overloads, common in power supply startup.

• Easy Identification: Clear “M2” marking for easy part verification.

📦 Typical Applications:

• Low-Frequency Power Rectification: In AC/DC adapters, battery chargers, and small linear power supplies.

• Reverse Polarity Protection: Placed in series on DC input lines to block reverse current.

• Freewheeling / Flyback Diode: Across relays, solenoids, or small motor coils to suppress inductive voltage spikes.

• Signal Demodulation & Clipping: In low-frequency analog circuits.

• General Purpose Blocking/Steering Diode: In various DIY electronics and repair applications.

🔧 Polarity & Mounting Notes:

• Polarity Identification: On the SMA package, the cathode is marked with a white line or stripe on one end of the component body. The body marking “M2” is typically read from the cathode end.

• PCB Footprint: Requires a standard SMA (DO-214AC) land pattern. Ensure correct orientation during placement.

• Thermal Management: For continuous operation near 1A, ensure the diode is soldered to adequate PCB copper area to act as a heatsink. A dedicated thermal pad on the PCB is recommended.

⚠️ Important Considerations:

• Frequency Limitation: Standard recovery time (~2µs) makes it unsuitable for high-frequency switching (SMPS). Use fast recovery or Schottky diodes for switching power supplies.

• Current Derating: The 1A rating is for continuous DC. At high ambient temperatures, current should be derated.

• Not for High-Frequency: Avoid using in circuits operating above ~1 kHz for efficient performance.

• Voltage Rating: Ensure your circuit’s peak reverse voltage does not exceed 100V. For 120V AC rectification (peak ~170V), use a 1N4004 (400V) or higher.

• SMD Soldering: Use reflow or hand soldering techniques suitable for SMA packages.