The **KEP-2B-R** is an electronic component primarily classified as a **High-Voltage Rectifier Diode**, often utilized in specialized industrial and commercial microwave oven circuits. --- ### ## Technical Specifications Below are the typical electrical parameters for this specific diode series: | Parameter | Specification | | :--- | :--- | | **Component Type** | High Voltage Rectifier Diode | | **Repetitive Peak Reverse Voltage ($V_{RRM}$)** | 12kV (12,000 Volts) | | **Average Forward Current ($I_{F(AV)}$)** | 350mA - 450mA | | **Maximum Forward Voltage Drop ($V_{F}$)** | Approx. 13V - 15V | | **Maximum Reverse Leakage Current ($I_{R}$)** | 5.0 $\mu$A | | **Operating Temperature Range** | -40°C to +130°C | --- ### ### Core Electronic Features 1. **High Voltage Rating:** Designed to handle the extreme potential differences generated by microwave transformers. 2. **Low Reverse Leakage:** Ensures efficiency and prevents overheating during the "blocking" phase of the AC cycle. 3. **Avalanche Protection:** Most versions of this diode include controlled avalanche characteristics to protect against transient voltage spikes. 4. **Molded Plastic Construction:** The body is usually made of flame-retardant epoxy to provide high insulation resistance. --- ### ### Common Applications The KEP-2B-R is most frequently found in: * **Microwave Ovens:** It works in conjunction with a high-voltage capacitor to create a "Voltage Doubler" circuit, providing the DC power required by the magnetron. * **High Voltage Power Supplies:** Used in laser equipment or X-ray machines. * **Electrostatic Air Cleaners:** Providing the high DC voltage needed to ionize particles. --- ### ### Circuit Symbol & Connection In a standard schematic, the diode is represented by the standard triangle and bar symbol. ```markdown (AC Input) ----|>|---- (Ground/Capacitor) Anode Cathode ``` * **The Cathode (Negative side):** Usually marked with a white or silver ring on the body. * **Installation Note:** Because this is a high-voltage part, standard multimeters cannot test it using the "Diode Test" function (as the forward voltage drop is higher than the multimeter's battery voltage). A 9V battery in series is usually required for testing.