The **RG1-302S-R15** is a high-precision, thin-film chip resistor network manufactured by **Susumu**. It is part of the RG series, which is renowned in the electronics industry for its high reliability, low noise, and extreme stability under harsh environmental conditions. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Resistance Value** | 3k$\Omega$ (302 indicates $30 \times 10^2$) | | **Tolerance** | $\pm$0.1% (Standard for "B" or "S" grade) | | **Power Rating** | 0.1W (1/10W) | | **Temperature Coefficient (TCR)** | $\pm$5 ppm/°C or $\pm$10 ppm/°C (Ultra-stable) | | **Package Size** | 0603 (Metric 1608) | | **Operating Temperature** | -55°C to +155°C | --- ### 2. Core Electronic Characteristics #### A. Thin-Film Technology Unlike standard thick-film resistors, the RG series uses a thin-metal film deposited onto an alumina substrate. This results in: * **Lower Noise:** Ideal for audio and sensitive measurement circuits. * **Higher Precision:** Tight tolerances that do not drift significantly over time. #### B. Inorganic Passivation The "RG" series features a unique glass-passivation layer. This provides superior protection against: * **Sulfur:** Prevents corrosion in industrial environments. * **Moisture:** Ensures the resistance value doesn't shift in high-humidity settings. #### C. Stability (Long-term drift) These parts are designed for "long-life" applications. While a standard resistor might drift 1-5% over its lifetime, the RG1 series typically maintains drift within **<0.1%** after thousands of hours of load life. --- ### 3. Part Number Breakdown The nomenclature follows a specific logic: * **RG:** Series Name (High reliability thin film). * **1608 / 1:** Refers to the physical dimensions (0603 Inch / 1608 Metric). * **302:** Resistance code. The first two digits (30) are significant figures; the last digit (2) is the multiplier ($10^2$). $30 \times 100 = 3,000\Omega$. * **S / B:** Indicates the tolerance and TCR combinations. * **R15:** Packaging suffix (usually referring to tape and reel specifications). --- ### 4. Common Applications * **Automotive Electronics:** Engine control units and safety sensors. * **Medical Equipment:** High-precision imaging and diagnostic tools. * **Industrial Automation:** Precision bridges and scale instrumentation. * **Test and Measurement:** Oscilloscopes and multi-meters. ---