MDK Solar PV Rectifier Diode 200A–400A 1600V Anti-Backflow M353

Solar PV Module MDK Rectifier Diode — 200A to 400A, 1600V

The MDK Solar Photovoltaic Module Rectifier Diode (M353) is a high-performance rectifier diode engineered for solar photovoltaic systems. Available in current ratings of 200A, 250A, 300A, 350A, and 400A with a maximum voltage rating of 1600V, this module delivers robust protection against backflow, back-charge, and reverse current — keeping your PV system running safely and efficiently. Customization is available to meet your specific project requirements.

Made in Mainland China.

Key Features

• Wide Current Range: Available in 200A, 250A, 300A, 350A, and 400A configurations to suit a variety of solar installations.
• High Voltage Rating: Maximum forward and reverse voltage of 1600V for demanding photovoltaic environments.
• Anti-Backflow Protection: Built-in diode design prevents reverse current, back-charge, and backflow — protecting your panels and charge controller.
• Rectifier Diode Type: Industrial-grade rectifier diode for reliable, long-term solar energy conversion.
• Customizable: Custom configurations available — contact our team for bulk orders or special requirements.
• New Condition: Shipped brand new, ready for immediate installation.
• No High-Concern Chemicals: Free from hazardous or restricted substances.

Technical Specifications

Important Selection & Usage Notes

1. Current Rating Selection

The rated current of this power module represents the average on-state value — not the long-term effective operating value. Always leave adequate margin based on your actual working environment:

• Resistive loads: Actual current (A) × 2 to 2.5 = Module nominal current (A)
• Inductive loads: Actual current (A) × 6 to 7 = Module nominal current (A)

2. Heat Sink Requirement

When the actual working current exceeds 5A, a compatible heat sink must be installed to ensure safe and stable operation. Please size and configure your heat sink appropriately for your application.

3. Stock & Bulk Orders

Standard models are available in stock and ready to ship. For bulk or large-quantity orders, please contact our customer service team to confirm quantities and delivery timelines.

Learn More About Solar Energy Safety

For guidance on safe solar photovoltaic system installation and electrical standards, visit the U.S. Department of Energy — Solar Energy Resources.

Frequently Asked Questions

Q: What current ratings are available for the MDK M353 Solar Rectifier Diode?

A: The MDK M353 is available in five current ratings: 200A, 250A, 300A, 350A, and 400A — all supporting a maximum voltage of 1600V. Select the rating that best fits your solar PV system's load requirements, remembering to apply the appropriate safety margin for resistive or inductive loads.

Q: Why does this rectifier diode need anti-backflow protection?

A: In solar photovoltaic systems, current can sometimes flow in reverse — back through the panels or charge controller — especially at night or during shading events. The MDK M353's anti-backflow, anti-back-charge, and anti-reverse-current diode design prevents this, protecting your solar modules and associated equipment from damage caused by reverse current.

Q: Is a heat sink required with this module?

A: Yes. When the actual operating current exceeds 5A, a suitable heat sink must be used to dissipate heat effectively and maintain safe, stable performance. Failure to install a heat sink at higher currents may reduce the lifespan or performance of the module.

Q: Can I order a custom configuration or buy in bulk?

A: Yes, custom configurations are supported. Standard models are available in stock for immediate purchase. For bulk orders, please reach out to our customer service team to confirm your required quantity and arrange an appropriate delivery schedule.