The designation **55152** is most commonly associated with a specific series of **High-Voltage Rectifier Diodes** used in CRT monitors, televisions, and high-voltage power supply units. ### 1. Component Overview The 55152 series (often identified by manufacturers like Sanken) is a fast-recovery high-voltage silicon rectifier. Its primary role is to convert high-voltage alternating current (AC) into direct current (DC) while handling the stress of flyback transformers. --- ### 2. Technical Specifications Below are the typical technical parameters for a 55152 series diode: | Parameter | Typical Value | | :--- | :--- | | **Repetitive Peak Reverse Voltage ($V_{RRM}$)** | 12kV to 15kV | | **Average Forward Current ($I_{O}$)** | 10mA - 20mA | | **Reverse Recovery Time ($t_{rr}$)** | 0.05µs to 0.1µs (Fast Recovery) | | **Forward Voltage Drop ($V_{F}$)** | ~30V to 50V (at rated current) | | **Operating Temperature** | -40°C to +120°C | --- ### 3. Key Features * **High Reliability:** Designed to withstand high transient voltages common in CRT circuits. * **Fast Recovery:** Necessary for high-frequency switching applications to minimize power loss and heat. * **Molded Package:** Usually comes in a resin-molded cylindrical package with long leads to prevent arcing across the component body. --- ### 4. Common Applications * **CRT Televisions & Monitors:** Found in the high-voltage section (anode supply) of the Flyback Transformer (FBT). * **Laser Power Supplies:** Used in the rectification stage for gas discharge lasers. * **X-Ray Equipment:** Part of the voltage multiplier circuits. * **Air Purifiers:** Used in electrostatic precipitators to generate ions. --- ### 5. Identification and Substitutes When searching for this part, it is often listed under full manufacturer prefixes: * **UX-FOB / UX-C2B:** Common functional equivalents. * **2CL Series:** Many 2CL70 or 2CL75 diodes serve as generic replacements if the voltage and current ratings match. > **Safety Warning:** These components are used in circuits carrying over 10,000 volts. Always ensure capacitors are fully discharged before handling or replacing these diodes.