The part number **23B2-R** typically refers to a **High-Voltage Rectifier Diode**, often utilized in specialized industrial or television applications (specifically in CRT focus circuits or high-voltage power supplies). Below is a detailed breakdown of the technical specifications and characteristics of this component. --- ### 1. Technical Specifications While exact parameters can vary slightly by manufacturer (such as EDI or Voltronics), the standard specifications for a 23B2-R series diode are generally as follows: | Feature | Specification | | :--- | :--- | | **Component Type** | High Voltage Silicon Rectifier | | **Peak Inverse Voltage (PIV/PRV)** | 23,000 Volts (23kV) | | **Average Forward Current ($I_F$)** | ~2.0 mA to 5.0 mA | | **Forward Voltage Drop ($V_F$)** | ~40V to 60V (due to internal series junctions) | | **Max Reverse Current ($I_R$)** | 1.0 $\mu$A at rated PIV | | **Construction** | Molded plastic, axial leads | --- ### 2. Physical Characteristics The "R" suffix often denotes **RoHS Compliance** (Restriction of Hazardous Substances), meaning the part is manufactured without lead or other restricted materials. * **Form Factor:** Axial leaded cylinder. * **Dimensions:** Usually longer than standard diodes to prevent "arcing" (electrical jumping) across the body of the component due to the 23kV potential. * **Polarity:** Indicated by a cathode band or bevel on one end. --- ### 3. Key Applications Because of its extremely high voltage rating and very low current capacity, this part is not used in standard logic or power circuits. Its primary uses include: 1. **CRT Displays:** Used in the focus or anode voltage multiplier circuits of older monitors and televisions. 2. **Electrostatic Air Cleaners:** Used to rectify high voltage for ionizing plates. 3. **X-Ray Equipment:** Small-scale portable X-ray power supplies. 4. **Laser Power Supplies:** Specifically for Gas Lasers (like HeNe) that require high starting voltages. --- ### 4. Safety and Handling Precautions Working with components like the 23B2-R involves significant risks: * **Arcing:** High voltage can jump through the air. Ensure proper spacing between the diode leads and other conductive paths. * **Potting:** In many applications, these diodes are "potted" (encapsulated in resin or silicone) to prevent moisture buildup and surface arcing. * **Capacitance:** Even after power is removed, circuits using these diodes can hold a lethal charge in the filter capacitors.