The part number **2017-23-SMH-RPLF** refers to a high-performance Gas Discharge Tube (GDT) surge arrestor manufactured by **Bourns Inc.** This component is part of the 2017 series, specifically designed for Surface Mount (SMD) applications requiring robust overvoltage protection. --- ### 1. Key Technical Specifications Below is a breakdown of the primary electrical and physical characteristics of this component: | Parameter | Specification | | :--- | :--- | | **Series** | 2017 (GDT Surge Arrestor) | | **DC Sparkover Voltage** | 230V (±20%) | | **Technology** | FLAT® GDT (Low profile design) | | **Configuration** | 2-Pole | | **Impulse Discharge Current** | 5 kA (8/20 μs waveform) | | **Mounting Type** | Surface Mount (SMD) | | **Termination Style** | Horizontal Mount with Leads (SMH) | | **RoHS Status** | Compliant (RPLF - RoHS Compliant / Lead-Free) | --- ### 2. Physical Design and Construction The **"SMH"** suffix indicates a specific physical configuration: * **FLAT® Technology:** Unlike traditional cylindrical GDTs, this part uses a flat, low-profile design. This reduces the height on the PCB, making it ideal for high-density boards. * **Horizontal Leads:** The leads are bent for horizontal surface mounting, ensuring a stable mechanical connection to the solder pads. --- ### 3. Application Use Cases This part is primarily used to protect sensitive electronic equipment from voltage transients caused by lightning or power switching. Typical applications include: * **Telecommunications:** Protection for ADSL, VDSL, and Ethernet ports. * **Industrial Equipment:** Protecting PLC inputs and sensitive sensors. * **Consumer Electronics:** Power supplies and set-top boxes. * **Modems/Gateways:** Shielding communication lines from surge events. --- ### 4. Key Advantages 1. **Low Capacitance:** GDTs have extremely low capacitance (typically <1 pF), making them "invisible" to high-speed data signals. 2. **High Current Handling:** Despite its small size, it can divert high-energy surges (up to 5,000 Amps) safely to ground. 3. **Space Saving:** The FLAT® technology allows for a significant reduction in vertical volume compared to standard GDTs. ---