The **LMK105BJ104MH-R** is a high-performance Multi-Layer Ceramic Capacitor (MLCC) manufactured by **Taiyo Yuden**. It is designed for high-density surface mount applications where space and reliability are critical. --- ### 1. Key Specifications The technical identity of this component can be broken down into the following parameters: | Parameter | Specification | | :--- | :--- | | **Capacitance** | 0.1 µF (100,000 pF) | | **Rated Voltage** | 10V DC | | **Tolerance** | ±20% | | **Temperature Characteristic** | X5R (-55°C to +85°C, ΔC ±15%) | | **Package / Case** | 0402 (1005 Metric) | | **Thickness** | 0.125mm (Ultra-low profile) | | **Termination** | Standard (Plated) | --- ### 2. Breakdown of the Part Number Understanding the Taiyo Yuden naming convention helps in identifying the specific attributes: * **LMK**: Indicates the Rated Voltage (L = 10V). * **105**: Represents the Dimensions (1.0 x 0.5 mm, which is 0402 inch). * **BJ**: Refers to the Temperature Characteristic (X5R). * **104**: The Capacitance code (10 followed by 4 zeros = 100,000pF or 0.1µF). * **M**: The Tolerance code (M = ±20%). * **H-R**: Specific series/packaging suffix (High reliability/Tape & Reel). --- ### 3. Core Features and Technology * **X5R Dielectric:** This is a Class II ceramic material. It offers a high volumetric efficiency (high capacitance in a small size) but is subject to capacitance changes based on temperature and applied DC voltage (DC Bias effect). * **Ultra-Miniature Size:** The 0402 footprint is roughly $1.0mm \times 0.5mm$, making it ideal for compact consumer electronics like smartphones and wearables. * **Low ESR/ESL:** Being an MLCC, it provides low Equivalent Series Resistance (ESR) and low Equivalent Series Inductance (ESL), which is essential for high-frequency filtering. --- ### 4. Typical Applications This component is commonly used in the following scenarios: 1. **Decoupling:** Placed near IC power pins to filter out high-frequency noise. 2. **Bypass:** Diverting unwanted AC signals to the ground in DC circuits. 3. **Smoothing:** Reducing ripple voltage in small DC-DC converters. 4. **Mobile Devices:** Due to the 10V rating and small size, it is a staple in mobile phone power management units (PMUs). ---