The part number **2003-23-SM-RPLF** refers to a specific Gas Discharge Tube (GDT) manufactured by **Bourns Inc.** This component is designed for circuit protection against high-voltage transients. --- ### 1. Technical Specification Table | Feature | Specification | | :--- | :--- | | **Manufacturer** | Bourns Inc. | | **Series** | 2003 Series | | **Type** | 3-Electrode Gas Discharge Tube (GDT) | | **DC Sparkover Voltage** | 230V ±20% | | **Mounting Type** | Surface Mount (SMD) | | **Discharge Current** | 10 kA (8/20 μs waveform) | | **Packaging** | Reel Packaging (indicated by "RP") | | **Compliance** | RoHS Compliant (Lead-Free - "LF") | --- ### 2. Breakdown of the Part Number The alphanumeric code follows a specific logic used by Bourns to identify the component's characteristics: * **2003**: The series identifier (3-electrode GDT, 5mm diameter). * **23**: The voltage rating (230V). * **SM**: Surface Mount technology. * **RP**: Tape and Reel packaging. * **LF**: Lead-Free (RoHS compliant). --- ### 3. Key Functions and Applications #### Functionality This device acts as a "crowbar" circuit protector. Under normal conditions, it remains in a high-impedance state. When a high-voltage surge (like lightning or power cross) occurs, the gas inside ionizes, creating a low-resistance path to ground, effectively diverting the excess energy away from sensitive electronics. #### Common Applications * **Telecommunications**: Protection for DSL, ADSL, and Ethernet lines. * **Industrial Equipment**: Protection for signal and data lines. * **Consumer Electronics**: Power supplies and modems. * **Smart Grids**: Protection for metering infrastructure. --- ### 4. Implementation Example In a typical 3-electrode setup, the GDT protects two lines (e.g., Tip and Ring in telephony) relative to a common ground. ```c // Concept: Overvoltage Protection Logic if (Input_Voltage > GDT_Sparkover_Voltage) { GDT_State = CONDUCTING; // Surge diverted to ground } else { GDT_State = HIGH_IMPEDANCE; // Normal operation } ```