MD100A Rectifier Diode 5A–150A 1000V Anti-Reverse Module
MD100A Rectifier Diode 5A–150A 1000V Anti-Reverse Module
MD100A Series Rectifier Diode Module — 5A to 150A, 1000V
The MD100A series is a compact, high-performance rectifier diode module engineered for a wide range of electrical and power electronics applications. With selectable current ratings from 5A all the way up to 150A and a maximum blocking voltage of 1000V, this anti-reverse / freewheeling diode module delivers reliable unidirectional current flow, circuit protection, and efficient rectification in a space-saving M220.58 package. Made in Mainland China.
Key Features
- Wide Current Range: Available in 5A, 10A, 20A, 25A, 30A, 40A, 50A, 70A, 100A, 110A, and 150A ratings to suit diverse load requirements.
- 1000V Blocking Voltage: High reverse voltage tolerance makes it suitable for industrial and commercial power circuits.
- Anti-Reverse / Freewheeling Function: Prevents back-current flow and protects sensitive components in inductive and resistive load circuits.
- Compact M220.58 Package: Small form factor for easy integration into control panels, power supplies, and motor drive circuits.
- Customizable: Custom voltage ratings available — 12V, 24V, 600V, 1200V, 1600V, and 1800V versions offered on request. Contact customer service with your quantity and specifications to confirm lead time. Volume discounts available.
- New Condition: Every unit ships brand new, directly from stock for standard 1000V models.
Specifications
- Model: MD100A (MD Series)
- Type: Rectifier Diode
- Max. Forward Current: Up to 150A (model-dependent)
- Max. Forward Voltage: 1000V
- Max. Reverse Voltage: 1000V
- Package: M220.58 (small form factor)
- Default Voltage: 1000V (custom voltages available)
- Condition: New
- Country of Origin: Made in Mainland China
⚠️ Important Selection & Usage Notes
1. Current Rating Selection
The marked current on the module represents the average on-state value, not the long-term effective RMS value. Always leave sufficient margin based on your actual operating conditions:
- Resistive loads: Multiply actual current (A) × 2 to 2.5 to determine the required module nominal current.
- Inductive loads: Multiply actual current (A) × 6 to 7 to determine the required module nominal current.
2. Heat Sink Requirement
When operating at currents above 5A, always install an appropriate heat sink to ensure safe, stable long-term operation and to prevent thermal damage.
3. Custom Orders
Standard 1000V models are available in stock and ready to ship. For custom voltage versions (12V, 24V, 600V, 1200V, 1600V, or 1800V), please contact customer service with your required quantity and specifications to confirm pricing and delivery time.
Typical Applications
- Solar panel charge controllers and battery protection circuits
- AC-to-DC power conversion and rectification
- Motor drive and braking circuits (freewheeling/afterflow diode)
- Industrial power supply units
- Reverse polarity protection in DC systems
- UPS systems and inverter circuits
For technical reference on electronic components and power semiconductor standards, visit the National Institute of Standards and Technology (NIST).
Frequently Asked Questions
Q: What is the default voltage rating of the MD100A rectifier diode module?
A: The default voltage rating is 1000V. Custom voltage options including 12V, 24V, 600V, 1200V, 1600V, and 1800V are available by contacting customer service with your order quantity and requirements.
Q: Do I need a heat sink with the MD100A rectifier diode?
A: Yes. When the actual working current exceeds 5A, it is strongly recommended to configure a suitable heat sink. Operating without adequate thermal management at higher currents can lead to overheating and reduced component lifespan.
Q: How do I choose the correct current rating for my application?
A: Always select a module with sufficient current margin. For resistive loads, choose a module rated at 2–2.5× your actual load current. For inductive loads (motors, solenoids, etc.), choose a module rated at 6–7× your actual load current to ensure reliable, safe operation.
Q: What package type does the MD100A series use?
A: The MD100A series uses the compact M220.58 package, making it easy to integrate into tight control panel spaces and custom PCB or bus-bar mounting configurations.
Q: What is the difference between an anti-reverse diode and a freewheeling (afterflow) diode?
A: An anti-reverse diode prevents current from flowing backward into a power source (e.g., solar panels or batteries). A freewheeling or afterflow diode provides a safe path for inductive load currents when a switching device turns off, protecting the circuit from voltage spikes. The MD100A series can serve both functions depending on circuit configuration.