The part number **15255-R** typically refers to a specific type of **surface-mount power inductor** or a specialized **automotive-grade component**, depending on the manufacturer (commonly associated with brands like Bourns, Coilcraft, or custom automotive hardware). Below is a breakdown of the technical specifications and characteristics generally associated with this part series. ### 1. Component Overview The "15255" series is often categorized as a high-current, shielded inductor designed for high-density electronic circuits where space is limited but power requirements are high. | Feature | Specification (Typical) | | :--- | :--- | | **Component Type** | Fixed Inductor / Power Choke | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Shielding** | Magnetically Shielded (Low EMI) | | **Material** | Ferrite Core | | **Termination** | RoHS Compliant (Lead-Free) | --- ### 2. Key Technical Characteristics In electronic engineering, the "R" suffix and the numerical prefix define how the part behaves in a circuit: * **Inductance Value:** Inductors in this range are designed to store energy in a magnetic field. They are used to filter noise or manage voltage conversion in DC-DC converters. * **The "R" Suffix:** In many component naming conventions, "R" signifies: 1. **RoHS Compliance:** The part meets environmental standards for hazardous substances. 2. **Decimal Point:** In value marking (e.g., 1R5), it represents a decimal (1.5µH). 3. **Taping/Reel:** It may indicate the packaging format (Tape & Reel). * **High Current Handling:** These parts are built to handle high "Saturation Current" ($I_{sat}$), meaning the inductance won't drop significantly even when high current flows through it. --- ### 3. Common Applications Parts labeled 15255-R are frequently found in the following sectors: 1. **Automotive Electronics:** Used in Engine Control Units (ECUs) and Infotainment systems due to their durability and shielding. 2. **Power Supplies:** Essential components in Buck or Boost converters to smooth out output current. 3. **Computing:** Found on motherboards and server cards for "Voltage Regulator Modules" (VRMs) that power CPUs. 4. **Industrial:** Used in motor drivers and PLC controllers to filter out electromagnetic interference (EMI). --- ### 4. Selection Criteria When replacing or designing with this part, engineers look at these critical parameters: * **DCR (DC Resistance):** Lower resistance is better to prevent heat loss. * **Saturation Current:** The limit where the inductor loses its effectiveness. * **Self-Resonant Frequency (SRF):** The frequency at which the part stops acting like an inductor. ---