The **PCHC40-R68M-RC** is a high-current, low-profile power inductor commonly used in DC-DC converters and power management modules. It is manufactured by companies like **Taiyo Yuden** (specifically within their MCOIL™ series or similar high-density power series). Below is the detailed breakdown of its specifications and electronic characteristics. --- ### 1. Part Number Decoder Understanding the alphanumeric code helps identify the component's physical and electrical limits: | Segment | Meaning | Description | | :--- | :--- | :--- | | **PCHC** | Series Type | High-current power inductor (Metal Core/Composite) | | **40** | Case Size | Refers to physical dimensions (typically 4.0 x 4.0 mm) | | **R68** | Inductance Value | **0.68 µH** (R denotes the decimal point) | | **M** | Tolerance | **±20%** | | **RC** | Compliance | RoHS Compliant / Standard environmental rating | --- ### 2. Key Electrical Specifications While exact values can vary slightly by manufacturer, the standard specs for an **R68** in this footprint are generally: * **Inductance:** 0.68 µH * **DC Resistance (DCR):** Very low (typically between 5mΩ to 15mΩ) to minimize power loss. * **Saturation Current ($I_{sat}$):** High capacity (often 8A to 15A), meaning the inductance won't drop significantly under high loads. * **Temperature Rise Current ($I_{rms}$):** The current level that causes a 40°C rise in component temperature. * **Operating Temperature:** Typically -40°C to +125°C. --- ### 3. Material and Construction The "HC" in the series usually refers to **High Current** or **High Composite** materials. * **Core Material:** Usually a Metal Powder or Carbonyl Iron composite. Unlike traditional ferrite cores, metal powder cores offer **soft saturation** characteristics (the inductance drops gradually rather than abruptly). * **Shielding:** These are **Magnetic Shielded** components. This prevents Electromagnetic Interference (EMI) from affecting nearby sensitive components on the PCB. * **Structure:** Wire-wound internal structure molded into a solid composite block for high mechanical durability. --- ### 4. Common Applications Due to its small size and high current handling, the PCHC40-R68M-RC is found in: 1. **Voltage Regulator Modules (VRM):** For CPUs and GPUs in laptops and tablets. 2. **DC-DC Converters:** Point-of-Load (POL) power supplies. 3. **Smartphones:** Battery management systems where space is at a premium. 4. **SSD Drives:** Providing stable power to high-speed flash controllers. --- ### 5. Summary Table | Property | Value/Type | | :--- | :--- | | **Component Type** | Fixed Inductor / Power Inductor | | **Inductance** | 0.68 µH | | **Tolerance** | ±20% | | **Shielding** | Shielded | | **Mounting Type** | Surface Mount (SMD/SMT) | ---