The term **1P0-R** typically refers to a specific naming convention used for passive electronic components, most commonly **Surface Mount Device (SMD) Power Inductors** or **Resistors**. Below is a detailed breakdown of what this part designation usually represents in the electronics industry. --- ### 1. Common Identification: SMD Power Inductor In the context of power electronics, "1P0-R" is frequently used as a part number suffix or value code for **High-Current Shielded Power Inductors** (often from manufacturers like Coilcraft, Eaton/Bussmann, or Wurth Elektronik). | Feature | Specification | | :--- | :--- | | **Inductance Value** | 1.0 Microhenries (µH) | | **"1P0" Notation** | The "P" acts as a decimal point. 1P0 = 1.0 | | **"R" Suffix** | Usually denotes "RoHS Compliant" or a specific Tolerance/Series designation. | | **Core Material** | Typically Ferrite or Metal Composite. | | **Typical Use Case** | DC-DC Converters, Voltage Regulator Modules (VRMs). | --- ### 2. Component Specifications If you are looking at a specific series (like the popular **FP1007R** or **HC8** series), the technical characteristics generally follow these patterns: #### Electrical Parameters * **Inductance:** $1.0 \mu H \pm 20\%$ * **DCR (Direct Current Resistance):** Very low (often $< 1 m\Omega$) to minimize power loss. * **Isat (Saturation Current):** The current level where inductance drops by a specific percentage. For a "1P0" inductor, this is often between **30A to 60A** depending on the physical size. #### Physical Attributes * **Mounting:** Surface Mount Technology (SMT). * **Shielding:** Usually magnetically shielded to prevent Electromagnetic Interference (EMI) with nearby components. --- ### 3. Alternative Identification: Resistors In some marking systems (though less common than inductors for this specific string), **1P0** can represent a resistor value. * **Value:** 1.0 Ohm ($\Omega$). * **Coding:** Under the BS 1852 standard, "R" or "P" is used as a decimal placeholder. * **Example:** `1R0` or `1P0` = 1.0 $\Omega$. --- ### Summary Table | Context | Meaning of "1P0" | Meaning of "-R" | | :--- | :--- | :--- | | **Power Inductors** | $1.0 \mu H$ Inductance | RoHS Compliant / Series Code | | **Resistors** | $1.0 \Omega$ Resistance | Resistance Tolerance / Reel Packaging | | **General Parts** | Part Revision 1.0 | Lead-Free / Restricted Substances | --- ### Comparison with Similar Codes * **R10:** $0.10 \mu H$ or $0.10 \Omega$ * **100:** $10 \mu H$ (where the third digit is the multiplier) * **2R2:** $2.2 \mu H$ or $2.2 \Omega$