The part number **47LR-152G-R** refers to a high-precision, leaded power inductor. These components are typically used in power supply filtering, decoupling, and EMI suppression applications. ### 1. Part Number Breakdown Based on standard industry conventions for power inductors (specifically from manufacturers like Gowanda or similar military/industrial suppliers), here is the breakdown of the specifications: | Segment | Meaning | Value | | :--- | :--- | :--- | | **47LR** | Series | Low Resistance (LR) series, size 47 | | **152** | Inductance Code | $15 \times 10^2$ µH = **1.5 mH** (1500 µH) | | **G** | Tolerance | **±2%** (Precision grade) | | **-R** | Compliance | **RoHS Compliant** | --- ### 2. Technical Specifications While exact values can vary slightly by brand, a 47LR-152G typically adheres to these electrical parameters: * **Inductance:** 1.5 mH (Millihenries). * **Tolerance:** ±2% (High precision compared to standard ±10% or ±20% inductors). * **Mounting Type:** Through-hole (Leaded). * **Construction:** Usually an axial leaded inductor with a ferrite core and protective epoxy coating or heat-shrink tubing. * **Application focus:** High stability and low DC resistance (DCR) to minimize power loss. --- ### 3. Key Applications Because of the "G" (2%) tolerance, this part is used where precise frequency response or filtering is required: 1. **Switch-Mode Power Supplies (SMPS):** Used for output smoothing and filtering ripple current. 2. **Audio Equipment:** High-precision inductors are used in crossover networks or noise filters where phase consistency is vital. 3. **EMI/RFI Suppression:** Blocking high-frequency noise from entering or exiting a circuit. 4. **Telecommunications:** Signal conditioning in lines where specific impedance is necessary. --- ### 4. Identification Table: Inductance Code Logic The "152" code follows the standard 3-digit EIA rule: | Digits | Calculation | Result | | :--- | :--- | :--- | | First two (15) | Base value | 15 | | Third (2) | Multiplier ($10^2$) | x 100 | | **Total** | **1500 µH** | **1.5 mH** |