The part number **1003-R** typically refers to a specialized electronic component, most commonly associated with **Surface Mount Technology (SMT) Inductors** or **Precision Resistors**, depending on the manufacturer (such as Fastron or Riedon). Below is a detailed breakdown of the specifications usually associated with this part series. --- ### 1. General Specifications In the context of SMT inductors (the most common use for this ID), the "1003" refers to the physical package size, while "-R" often denotes RoHS compliance or a specific tolerance/winding style. | Feature | Specification (Typical) | | :--- | :--- | | **Package Type** | 1003 (Metric) / Approx. 0401 (Imperial) | | **Component Type** | Fixed Inductor or Precision Chip Resistor | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Lead Status** | RoHS Compliant (Lead-Free) | | **Operating Temp** | -40°C to +125°C | --- ### 2. Key Variations The characteristics change based on the specific manufacturer. Here are the two primary interpretations: #### A. SMT Chip Inductors (e.g., Fastron 1003 Series) These are used for high-frequency filtering and signal processing. * **Inductance Range:** Usually ranges from 1.0 nH to 100 µH. * **Core Material:** Ceramic or Ferrite. * **Applications:** Mobile phones, Wi-Fi modules, and RF circuits. #### B. Precision Resistors (e.g., Riedon 1000 Series) If the part is a resistor, "1003" may indicate a specific resistance value (100kΩ) or a series model. * **Resistance:** 100k Ohms (using the 4-digit code: 100 + 3 zeros). * **Tolerance:** Often ±0.1% or ±1% (denoted by the suffix). * **Stability:** High precision with low thermal noise. --- ### 3. Visual and Mechanical Data The "1003" designation indicates the footprint dimensions in millimeters. | Dimension | Measurement (mm) | Measurement (inches) | | :--- | :--- | :--- | | **Length (L)** | 1.00 mm | 0.039 in | | **Width (W)** | 0.30 mm | 0.012 in | | **Height (H)** | 0.50 mm | 0.020 in | --- ### 4. Typical Applications Components labeled 1003-R are generally found in: 1. **Consumer Electronics:** Power management in smartphones. 2. **Automotive:** Sensor signal conditioning. 3. **Telecommunications:** High-speed data transmission filters. 4. **Medical Devices:** Compact PCB designs requiring high reliability.