The part number **2017-15-SMH-RPLF** refers to a specific type of Gas Discharge Tube (GDT) manufactured by **Bourns Inc.** This component belongs to the "2017 Series" of high-performance surface-mount gas discharge tubes designed for surge protection. --- ## 1. Technical Specifications Below are the primary electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Component Type** | Gas Discharge Tube (GDT) | | **Mounting Type** | Surface Mount (SMD) | | **DC Sparkover Voltage** | 150V (±20%) | | **Number of Poles** | 2-Pole | | **Impulse Discharge Current** | 10 kA (8/20 µs) | | **Capacitance** | < 1.0 pF | | **Insulation Resistance** | > 10 GΩ | | **Operating Temperature** | -40°C to +90°C | --- ## 2. Part Number Breakdown The alphanumeric code follows the standard Bourns naming convention: * **2017**: The Series name (High-performance, 2-electrode GDT). * **15**: Indicates the DC Sparkover voltage (150V). * **SMH**: Refers to the "Surface Mount Heavy-duty" package/form factor. * **RP**: Denotes "Reel Pack" (packaging method). * **LF**: Stands for "Lead-Free" (RoHS compliant). --- ## 3. Key Features & Applications ### Key Features * **Flat GDT Technology:** Unlike traditional cylindrical GDTs, the 2017 series features a low-profile, flat design specifically optimized for automated SMT (Surface Mount Technology) assembly. * **Low Capacitance:** With a capacitance of less than 1 pF, it is ideal for high-speed data lines as it does not degrade signal integrity. * **High Reliability:** Capable of handling high surge currents (10kA) despite its small footprint. ### Common Applications 1. **Telecommunications:** Protection for central office equipment, line cards, and modems. 2. **Industrial:** Surge protection for RS-485 or Ethernet communication ports. 3. **Power Supplies:** Protecting sensitive internal circuits from external voltage spikes. 4. **Data Centers:** Protection for high-speed networking hardware. --- ## 4. Typical Circuit Symbol In a schematic, this component is represented by a circle with two opposing electrodes, often with a "Z" or tilde-like symbol inside to represent the gas discharge gap. ```text | | --| |--- | | (Symbol for 2-Pole GDT) ```