The **12-TQ3-R** is a specific part number typically associated with **SMD (Surface Mount Device) Electrolytic Capacitors**. These components are widely used in power management, filtering, and buffering applications within electronic circuits. ### 1. General Specifications While specific values (Voltage/Capacitance) can vary based on the manufacturer (often associated with brands like **Lelon** or **Samxon**), the "TQ" series generally refers to high-temperature, low-impedance characteristics. | Feature | Typical Specification | | :--- | :--- | | **Type** | Aluminum Electrolytic Capacitor | | **Mounting Type** | SMD (Surface Mount Device) / V-Chip | | **Operating Temperature** | -55°C to +105°C | | **Endurance** | 2,000 to 5,000 hours (at 105°C) | | **RoHS Status** | Compliant (indicated by the "-R" suffix) | --- ### 2. Breakdown of the Part Number Though naming conventions differ slightly by manufacturer, the code usually breaks down as follows: * **12**: Often represents the physical size code (e.g., 12.5mm diameter) or a specific voltage rating code. * **TQ**: The **Series Name**. TQ series capacitors are typically designed for **Low Impedance** and high reliability in high-frequency applications. * **3**: Often a placeholder for the capacitance tolerance or a specific packaging code. * **-R**: Stands for **RoHS Compliant** or **Tape & Reel** packaging. --- ### 3. Key Characteristics * **Low ESR (Equivalent Series Resistance):** These parts are designed to minimize energy loss as heat, making them efficient for high-frequency switching power supplies. * **V-Chip Construction:** The "Vertical Chip" design allows the component to be soldered directly onto the surface of a PCB using automated pick-and-place machines. * **Vibration Resistance:** Many components in this series are designed to withstand mechanical stress, making them suitable for automotive or industrial electronics. --- ### 4. Typical Applications * **DC-DC Converters:** Filtering input and output noise. * **Motherboards/Graphics Cards:** Providing stable voltage to processors. * **LED Drivers:** Smoothing the current to prevent flickering. * **Telecommunications:** Power buffering in networking equipment. --- ### 5. Identification Example If you are looking at a PCB and see "12-TQ3-R", check the markings on top of the aluminum can. They usually display: 1. **Capacitance** (e.g., 100µF) 2. **Voltage** (e.g., 16V, 25V) 3. **Date Code** (for manufacturing batches)