The **RG3-303N-R15** is a high-precision, thin-film chip resistor array manufactured by **Susumu**. These components are designed for applications requiring high reliability, thermal stability, and precise resistance ratios between multiple resistive elements. --- ## 1. Core Specifications The "RG" series is known for its "Metal Glaze" or "Thin Film" construction, which provides superior performance compared to standard thick-film resistors. | Feature | Specification (Typical) | | :--- | :--- | | **Resistor Type** | Thin Film Chip Resistor Network | | **Resistance Value** | 30k $\Omega$ (indicated by "303") | | **Tolerance** | $\pm$ 0.1% (N) or higher precision | | **Power Rating** | ~0.063W per element | | **Temperature Coefficient (TCR)** | $\pm$ 25 ppm/°C (R15 series typical) | | **Operating Temperature** | -55°C to +155°C | --- ## 2. Part Number Breakdown Understanding the nomenclature helps identify the exact electronic characteristics: * **RG**: Series code (High reliability, thin film). * **3**: Size/Physical dimensions (typically 3216 metric / 1206 imperial for the array). * **303**: Resistance value. The first two digits (30) are significant figures; the third digit (3) is the multiplier ($10^3$). Result: **30,000 $\Omega$ (30k $\Omega$)**. * **N**: Tolerance code. Represents high precision (often $\pm$0.1% for this series). * **R15**: Packaging/Specific TCR rating or revision indicator. --- ## 3. Key Electronic Characteristics ### A. Thin Film Construction Unlike thick film resistors, thin film technology uses a sputtered metal layer on a ceramic substrate. This results in: * **Lower Noise:** Reduced current noise for sensitive analog circuits. * **High Stability:** Excellent resistance against aging and environmental moisture. ### B. Thermal Tracking Because the resistors are integrated onto a single substrate, they experience the same temperature variations. This allows for **tight tracking**, meaning the ratio between resistors stays constant even if the ambient temperature changes. ### C. Reliability (Sulfur Resistance) Susumu’s RG series is specifically designed to be inorganic and sulfur-resistant, making them ideal for automotive or industrial environments where atmospheric pollutants might cause standard resistors to fail. --- ## 4. Common Applications * **Instrumentation:** Differential amplifiers and bridge circuits. * **Medical Electronics:** Precision sensing and signal conditioning. * **Automotive:** Engine control units (ECU) and battery management systems. * **Industrial:** High-accuracy voltage dividers.