The **RG3-204S-R15** is a high-precision, thin-film chip resistor array manufactured by **Susumu**. It belongs to the RG series, which is industry-renowned for its reliability, low noise, and high stability under harsh environmental conditions. --- ### 1. General Specifications This component is a "network" or "array" of resistors, meaning multiple resistor elements are housed within a single surface-mount package. | Parameter | Specification | | :--- | :--- | | **Manufacturer** | Susumu | | **Series** | RG (High Reliability Thin Film) | | **Circuit Type** | Isolated (Individual resistors) | | **Number of Resistors** | 4 Resistors | | **Resistance Value** | Determined by the specific "R15" suffix (typically 150 $\Omega$ or 15 $\Omega$ depending on series coding) | | **Tolerance** | $\pm 0.1\%$ (Standard for RG series) | | **Temperature Coefficient (TCR)** | $\pm 25 \text{ ppm/}^\circ\text{C}$ | --- ### 2. Key Electronic Characteristics #### A. Thin Film Technology Unlike standard thick film resistors, the RG series uses a thin metal film deposited on a ceramic substrate. This results in: * **Low Noise:** Superior performance in audio and high-frequency signal paths. * **Long-term Stability:** Resistance values remain consistent over thousands of hours of operation. #### B. Integrated Array Advantage By putting four resistors in one package: * **Thermal Tracking:** Because all four resistors are on the same ceramic chip, they heat up and cool down at the same rate. This is critical for differential amplifiers or voltage dividers where the *ratio* between resistors is more important than the absolute value. * **Space Saving:** Reduces the footprint on the PCB compared to four individual 0603 or 0402 components. --- ### 3. Physical Dimensions (S-Type) The "S" in the part number typically refers to the package size. The RG3 series usually follows a standard footprint for multi-resistor chips. ```text [ Terminal 1 ] [ Terminal 2 ] [ Terminal 3 ] [ Terminal 4 ] +-----------------------------------------------------------+ | | | RG3 Chip | | | +-----------------------------------------------------------+ [ Terminal 8 ] [ Terminal 7 ] [ Terminal 6 ] [ Terminal 5 ] ``` --- ### 4. Common Applications * **Precision Instrumentation:** Measurement equipment requiring high accuracy. * **Automotive Electronics:** Sensors and control units (ECUs) where heat cycles are frequent. * **Medical Equipment:** High-reliability circuits for monitoring devices. * **Communication Base Stations:** Maintaining signal integrity in RF circuits.