The **RG2-211S-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 exceptional reliability and low noise characteristics. --- ### 1. Key Technical Specifications Below are the primary electrical parameters for the RG2-211S-R15: | Feature | Specification | |:---|:---| | **Resistance Value** | 210 $\Omega$ (indicated by the '211' code) | | **Resistance Tolerance** | ±0.1% (S-grade precision) | | **Power Rating** | 0.25W (1/4 Watt) | | **Temperature Coefficient (TCR)** | ±5 ppm/°C | | **Case Size** | 0805 (2012 Metric) | | **Operating Temperature** | -55°C to +155°C | | **Maximum Voltage** | 150V | --- ### 2. Composition and Construction The "Electronic Parts" aspect refers to how this component is built to achieve its performance: * **Thin-Film Technology:** Unlike standard thick-film resistors, the RG series uses a thin metallic film sputtered onto a high-grade ceramic substrate. This results in much lower noise and better linearity. * **Inorganic Passivation:** The resistor element is covered by a glass-based inorganic thin-film layer. This protects the part from moisture and sulfur, preventing "sulfur-induced corrosion" which is common in automotive and industrial environments. * **Terminations:** Typically features a lead-free (Sn) finish over a nickel barrier, ensuring excellent solderability and resistance to leaching during the assembly process. --- ### 3. Part Number Breakdown Understanding the nomenclature helps identify the specific characteristics: | Code | Meaning | |:---|:---| | **RG** | Series Name (High Precision Thin Film) | | **2012** (Implied) | Body size (2.0mm x 1.25mm) | | **211** | Resistance: 21 (significant digits) + 1 (multiplier: $10^1$) = 210 $\Omega$ | | **S** | Tolerance: ±0.1% | | **R15** | Specific TCR/Packaging code (indicates ±5ppm/°C) | --- ### 4. Typical Applications Because of its high stability and low Temperature Coefficient (TCR), this part is used in: 1. **Medical Equipment:** Precision imaging and diagnostic tools. 2. **Test and Measurement:** Multimeters, oscilloscopes, and signal generators. 3. **Automotive Electronics:** Sensors and Engine Control Units (ECUs) where heat fluctuates. 4. **Audio Equipment:** High-end DACs and amplifiers where signal purity (low noise) is critical.