The **2087-150SM-RPLF** is a Gas Discharge Tube (GDT) manufactured by **Bourns Inc.** This component is primarily used for overvoltage protection in sensitive electronic circuits. ### 1. Technical Specifications Below are the key electrical and physical parameters for this specific part: | Parameter | Specification | | :--- | :--- | | **Manufacturer** | Bourns Inc. | | **Series** | 2087 | | **DC Sparkover Voltage** | 150V (±20%) | | **Number of Poles** | 2-Pole | | **Impulse Discharge Current** | 5 kA (8/20 µs) | | **Mounting Type** | Surface Mount (SMD) | | **Packaging** | Tape & Reel (TR) | | **Operating Temperature** | -40°C to +125°C | | **RoHS Status** | Compliant (Lead-Free) | --- ### 2. Functional Description A Gas Discharge Tube acts as a high-speed switch. Under normal operating conditions, the device has a very high resistance (effectively an open circuit). When a voltage surge (like a lightning strike or power spike) exceeds the 150V threshold: 1. **Ionization:** The gas inside the tube ionizes. 2. **Conductivity:** The tube becomes a low-impedance path (arc mode). 3. **Shunting:** The excess energy is diverted to the ground, protecting downstream components. 4. **Reset:** Once the surge passes and the voltage drops, the gas de-ionizes and the device returns to its high-impedance state. --- ### 3. Key Features & Advantages * **Low Capacitance:** Typically less than 1 pF, making it ideal for high-speed data lines (Ethernet, DSL) where signal integrity is critical. * **GDT Technology:** Provides much higher current handling capabilities compared to TVS diodes or MOVs of a similar size. * **SMD Format:** The "SM" in the part number indicates it is designed for automated surface mount assembly, saving board space. * **Reliability:** Bourns GDTs are known for long-term stability and robust performance in harsh environments. --- ### 4. Common Applications * **Telecommunications:** Protection for central office equipment, modems, and line cards. * **Industrial:** Protection for RS-485, RS-232, and CAN bus interfaces. * **Power Supplies:** Used as a primary protection layer against AC line transients. * **Consumer Electronics:** Protecting sensitive internal circuitry from external cable surges.