The part number **48V-2RHA-R** refers to a specific type of **Gas Discharge Tube (GDT)**, which is a protection component used to suppress high-voltage transients (surges). These are commonly manufactured by companies like Littelfuse or Bourns and are crucial for protecting sensitive telecommunications and data equipment. --- ### 1. Component Overview The **48V-2RHA-R** is a 2-electrode, high-voltage spark-over gas discharge tube. Its primary function is to act as a high-speed switch that diverts excess electrical energy to the ground when a voltage spike (like lightning or power surges) occurs. ### 2. Technical Specifications The following table outlines the typical electrical characteristics for this series: | Parameter | Specification (Typical) | |:---|:---| | **DC Spark-over Voltage** | 4800V (4.8kV) ± 20% | | **Number of Electrodes** | 2 | | **Impulse Discharge Current** | 10kA to 20kA (8/20μs) | | **Insulation Resistance** | > 10 GΩ | | **Capacitance** | < 1.0 pF | | **Mounting Type** | Axial Lead (RHA series) | | **RoHS Compliant** | Yes (indicated by the "-R" suffix) | --- ### 3. Key Electronic Characteristics * **High Spark-over Voltage:** The "48V" in the prefix (in the context of this specific high-voltage series) often denotes a **4800V** rating. This is used in applications where high isolation is required. * **Low Capacitance:** Because it has a capacitance of less than 1pF, it does not distort high-frequency signals, making it ideal for high-speed data lines. * **Crowbar Effect:** Once the voltage exceeds 4800V, the gas inside ionizes, creating a low-impedance path (arc) that "clamps" the voltage to a very low level until the surge passes. ### 4. Applications These components are typically found in: 1. **Telecommunications:** Protection for telephone lines and base stations. 2. **Power Supplies:** High-voltage surge protection in AC/DC converters. 3. **Industrial Equipment:** Protecting sensors and control circuits from motor-induced transients. 4. **Medical Electronics:** Ensuring patient safety by isolating high-voltage power sections. --- ### 5. Part Number Breakdown While manufacturer codes vary slightly, the nomenclature generally follows this logic: * **48V (or 482):** Represents the DC breakdown voltage (4800V). * **2R:** Indicates a 2-electrode device. * **HA:** High-Amperage/High-Voltage series designation. * **-R:** RoHS compliant (Lead-free).