The part number **2017-15-SMC-RPLF** refers to a high-performance **Gas Discharge Tube (GDT)** manufactured by **Bourns Inc.** These components are critical for circuit protection against overvoltage transients. --- ## 1. Technical Specifications The following table outlines the primary electrical characteristics of the 2017-15-SMC-RPLF: | Parameter | Specification | | :--- | :--- | | **Component Type** | Gas Discharge Tube (GDT) | | **DC Sparkover Voltage** | 150V (±20%) | | **Number of Poles** | 2-Pole | | **Impulse Discharge Current** | 10 kA (8/20 μs waveform) | | **Insulation Resistance** | > 1 GΩ @ 50V | | **Capacitance** | < 1.0 pF | | **Mounting Type** | Surface Mount (SMD) | | **Series** | 2017 (GDT nextgen™ Series) | --- ## 2. Key Features and Construction The **2017-15-SMC-RPLF** belongs to Bourns' "GDT nextgen™" series, which offers significant improvements over legacy models: * **Low Profile Design:** The "SMC" designation indicates a compact surface-mount package, optimized for automated pick-and-place assembly. * **Flat Response:** It features improved "voltage limiting" performance during fast-rising transients compared to older GDT technologies. * **Stability:** High insulation resistance and low capacitance make it virtually transparent to the circuit during normal operation, ensuring it does not degrade high-speed data signals. * **RoHS Compliant:** The "LF" suffix denotes that the part is Lead-Free and meets environmental standards. --- ## 3. Applications Because of its high current handling and low capacitance, this part is commonly used in: 1. **Telecommunications:** Protecting line cards, modems, and VOIP equipment. 2. **Industrial Controls:** Safeguarding RS-485 or Ethernet interfaces from lightning surges. 3. **Power Supplies:** Used as a primary protection stage for AC/DC converters. 4. **Consumer Electronics:** Protecting sensitive antennas or high-frequency communication ports. --- ## 4. Comparison: GDT vs. TVS Diode While both protect against overvoltage, the GDT functions differently: | Feature | Gas Discharge Tube (GDT) | TVS Diode | | :--- | :--- | :--- | | **Capacitance** | Extremely Low (< 1pF) | Higher (pF to nF) | | **Current Handling** | Very High (up to 10kA) | Moderate | | **Response Time** | Slower (Nanoseconds) | Very Fast (Picoseconds) | | **Failure Mode** | Usually Open Circuit | Usually Short Circuit | ---