The **RG1-102S-R15** is a high-precision, ultra-stable thin-film chip resistor manufactured by **Susumu**. It belongs to the **RG series**, which is widely recognized in the electronics industry for its reliability and low noise characteristics. --- ### 1. Technical Specifications The part number can be broken down to understand its electrical characteristics: | Parameter | Specification | Details | | :--- | :--- | :--- | | **Series** | RG | High precision thin film | | **Case Size** | 1005 (Metric) / 0402 (Inch) | 1.0mm x 0.5mm | | **Resistance Value** | 1.0 kΩ (102) | "10" (Significant digits) + "2" (Multiplier) | | **Resistance Tolerance** | ±0.01% (S) | Ultra-tight precision | | **Temp. Coefficient (TCR)** | ±5 ppm/°C (R) | Extremely stable across temperatures | | **Power Rating** | 0.063W (1/16 W) | Standard for 0402 sizing | | **Operating Temp.** | -55°C to +155°C | Industrial/Automotive grade | --- ### 2. Internal Construction The RG series utilizes a specific "Thin Film" architecture that differentiates it from standard thick-film resistors: * **Resistive Element:** A thin layer of metal film (usually Ni-Cr) is sputtered onto a high-grade ceramic substrate. * **Passivation:** It features a unique inorganic glass coating (passivation layer) that protects the resistive element from moisture and sulfur, preventing "silver migration" or corrosion. * **Terminations:** Lead-free (RoHS compliant) wrap-around terminations for surface mount (SMD) soldering. --- ### 3. Key Features & Advantages * **Long-term Stability:** The RG series is known for having a drift of less than ±0.1% after 10,000 hours of testing. * **Low Noise:** Due to the thin-film structure, it has much lower thermal noise and non-linearity compared to thick-film resistors. * **Sulfur Resistance:** The specialized coating makes it suitable for harsh environments (e.g., automotive or industrial sensors). --- ### 4. Typical Applications Because of the **±0.01% tolerance** and **5ppm TCR**, this part is used where accuracy is critical: 1. **Medical Equipment:** Precision measurement in diagnostic devices. 2. **Instrumentation:** Operational amplifier gain setting and voltage dividers. 3. **Automotive Electronics:** Sensors and control units (ECUs) requiring high reliability. 4. **Audio Equipment:** High-end DACs and pre-amplifiers where signal purity is essential.