5pcs m7 1n4007 smd diode

🔹 5PCS M7 / 1N4007 – 1A 1000V General Purpose Rectifier Diode (SMA/DO-214AC)

A surface-mount version of the ubiquitous 1N4007 rectifier diode, marked with the SMD code M7. This is a standard recovery diode designed for general-purpose rectification, freewheeling, and protection in AC/DC power supplies, offering a high voltage rating suitable for mains-derived circuits.

✅ Specifications:

• Part Number: M7 (SMD code) / 1N4007 (Standard equivalent)

• Type: Standard Recovery Rectifier Diode

• Max Repetitive Reverse Voltage (VRRM): 1000V

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

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

• Forward Voltage (VF): ~1.1V (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: M7 printed on diode body

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

• Quantity: 5 pieces

⚙️ Key Features:

• High Voltage Rating: The 1000V rating makes it suitable for rectification in offline AC-DC power supplies (110V/220V AC mains), providing a significant safety margin.

• Compact SMD Design: Replaces the bulky through-hole DO-41 package, saving considerable PCB space.

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

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

• Easy Identification: Clear “M7” marking for straightforward part verification.

📦 Typical Applications:

• AC Mains Rectification: In bridge or half-wave rectifier circuits for low-power offline switch-mode power supplies (SMPS) or linear adapters.

• High-Voltage DC Circuits: Rectification in voltage multipliers, CRT flyback circuits, or other high-voltage DC generators.

• Freewheeling / Flyback Diode: Across relays, solenoids, or transformer primary windings to suppress inductive voltage spikes.

• General Purpose Blocking/Steering: In various industrial and consumer electronics where high-voltage isolation is needed.

• Replacement: Direct SMD replacement for through-hole 1N4007 diodes in new PCB designs.

🔧 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 “M7” 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. Power dissipation (~1.1W) requires proper thermal design.

⚠️ Critical Safety & Usage Warnings:

• AC MAINS VOLTAGE WARNING: This diode is rated for high-voltage applications. Extreme caution is required when designing or testing circuits connected to AC mains. Ensure proper creepage/clearance distances on the PCB and use appropriate enclosures.

• Frequency Limitation: Standard recovery time (~2µs) makes it unsuitable for high-frequency switching (SMPS above ~1 kHz). Use fast recovery diodes for switching power supplies.

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

• Voltage Margin: For 230V AC rectification (peak ~325V), a 400V diode is theoretically sufficient, but the 1000V rating of the M7 provides excellent protection against line transients and surges.

• SMD Soldering: Use reflow or hand soldering techniques suitable for SMA packages. Ensure no solder bridges given the high voltage potential.