The **MAH13FAX-R** is a specialized high-voltage electronic component, typically categorized as a **High Voltage Diode (Rectifier)**. These parts are most commonly found in high-voltage power supply circuits, such as those used in microwave ovens, X-ray equipment, or laser power systems. --- ### 1. Key Technical Specifications While specific datasheets can vary slightly by manufacturer (often produced by companies like **Gaoli** or **Fuji**), the general specifications for this series are as follows: | Feature | Specification | |:---|:---| | **Component Type** | High Voltage Silicon Rectifier Diode | | **Repetitive Peak Reverse Voltage ($V_{RRM}$)** | 13,000V (13kV) | | **Average Forward Current ($I_{F(AV)}$)** | 350mA - 500mA (Typical) | | **Forward Voltage Drop ($V_F$)** | ~10V to 14V (at rated current) | | **Operating Temperature** | -40°C to +130°C | | **Mounting Type** | Through-Hole (Axial Lead) | --- ### 2. Functional Characteristics High voltage diodes like the MAH13FAX-R are distinct from standard signal diodes due to their construction: * **Multi-Junction Stack:** To handle 13,000 volts, the device is internally constructed of several silicon diode chips stacked in series and encapsulated in a high-insulation epoxy resin. * **Avalanche Protection:** These diodes are often designed with "avalanche characteristics," meaning they can withstand brief spikes in reverse voltage without immediate catastrophic failure. * **Low Leakage:** They exhibit extremely low reverse leakage current to ensure efficiency and safety in high-tension environments. --- ### 3. Common Applications This part is essentially a "workhorse" for rectifying AC to DC in high-voltage environments: 1. **Microwave Ovens:** Used in the doubling circuit to convert the transformer's AC output into high-voltage DC for the magnetron. 2. **Electrostatic Air Cleaners:** Providing the high-voltage DC needed to ionize dust particles. 3. **Medical Equipment:** Used in X-ray generators and high-voltage diagnostic tools. 4. **CRT Monitors:** Found in older television flyback transformer circuits. --- ### 4. Identification and Testing When inspecting or replacing a MAH13FAX-R, keep the following in mind: * **Testing with a Multimeter:** You **cannot** test this diode with a standard digital multimeter (DMM) "Diode Test" mode. Because the forward voltage drop ($V_F$) is over 10V and most DMMs only provide 2V–3V for testing, the diode will always appear as an "Open Circuit" (OL). * **Polarity:** The cathode (negative side) is usually marked with a white or silver band. * **Safety:** **WARNING:** This component deals with lethal voltages. Always ensure capacitors are discharged before handling circuits containing this diode.