The **2JS3-R** is a specific electronic component, primarily categorized as a **high-voltage, high-speed switching diode**. It is commonly utilized in specialized power supplies and television circuitry (particularly in legacy CRT flyback transformers or focus circuits). --- ### ## 1. Technical Specifications The following table outlines the typical electrical characteristics for the 2JS3-R: | Parameter | Value | Description | | :--- | :--- | :--- | | **Type** | Silicon Diode | High-voltage rectification | | **Peak Reverse Voltage ($V_{RRM}$)** | 3.0 kV | Maximum repetitive peak voltage | | **Average Forward Current ($I_{F}$)** | 5 - 10 mA | Maximum average rectified current | | **Reverse Recovery Time ($t_{rr}$)** | ~0.1 µs | Speed of switching from ON to OFF | | **Mounting Type** | Through-Hole | Standard leaded package | --- ### ## 2. Key Features * **High Voltage Rating:** Capable of handling peaks up to 3,000 volts, making it suitable for secondary high-voltage stages. * **Fast Recovery:** The "Fast Recovery" characteristic prevents power loss and overheating during high-frequency switching operations. * **Compact Form Factor:** Usually found in a small resin-molded cylindrical package designed to prevent arcing between leads. --- ### ## 3. Common Applications The 2JS3-R is generally integrated into the following systems: 1. **CRT Displays:** Used in the anode voltage multiplier or focus voltage regulation of older monitors and televisions. 2. **Laser Power Supplies:** Acts as a rectifier in low-current, high-voltage trigger circuits. 3. **Air Purifiers:** Utilized in ionizer circuits that require high-voltage DC. 4. **Copy Machines:** Found in the high-voltage power blocks for drum charging. --- ### ## 4. Equivalent and Replacement Parts If the 2JS3-R is unavailable, the following components often serve as functional substitutes, provided the physical dimensions fit: * **NTE506:** A common universal high-voltage replacement. * **R3000:** A standard 3kV high-voltage diode. * **2CL Series:** Various Chinese-manufactured high-voltage silicon stacks. ---