The part code **C20-R27K** refers to a specific surface-mount electronic component, typically a **Thick Film Chip Resistor**. Based on standard manufacturing nomenclature (commonly used by brands like Yageo, Vishay, or Walsin), here is the detailed breakdown: ### 1. Part Number Breakdown | Segment | Meaning | Description | | :--- | :--- | :--- | | **C** | Component Type | Often denotes a Chip Resistor or Capacitor (Context dependent). | | **20** | Case Size | Refers to the **1206** imperial package (3.2mm x 1.6mm). | | **R27** | Resistance Value | The "R" acts as a decimal point. Value: **0.27 Ohms**. | | **K** | Tolerance | Represents a tolerance of **±10%**. | --- ### 2. Technical Specifications If this is a standard 1206 chip resistor, the following electrical characteristics generally apply: * **Resistance:** 0.27 $\Omega$ (Milliohm range, often used for current sensing). * **Power Rating:** Typically **0.25W (1/4 Watt)** for the 1206 package size. * **Maximum Working Voltage:** Usually around 200V (though limited by Ohm's law at this low resistance). * **Operating Temperature:** -55°C to +155°C. * **Construction:** Thick film element on a high-grade ceramic body with protective overcoat. --- ### 3. Common Applications Because the resistance value is very low (0.27Ω), this part is rarely used for simple current limiting. Instead, it is found in: 1. **Current Sensing:** Used to measure current flow by monitoring the voltage drop across the resistor ($V = I \times R$). 2. **Feedback Loops:** In DC-DC converters or Power Management ICs (PMICs). 3. **Low-Frequency Filters:** Used in conjunction with capacitors to smooth signals. 4. **Battery Management:** Sensing charge/discharge rates in portable electronics. --- ### 4. Summary Table | Feature | Specification | | :--- | :--- | | **Category** | Passive Component | | **Type** | Fixed Resistor (SMD/SMT) | | **Package Code** | 1206 (Imperial) / 3216 (Metric) | | **Value** | 270 m$\Omega$ | | **Tolerance** | ±10% |