The **CTX100-2-52M-R** is a high-performance power inductor, specifically a **dual-winding toroidal inductor** manufactured by Eaton (formerly Cooper Bussmann/Coiltronics). Below is a detailed breakdown of its specifications, construction, and typical applications. --- ### 1. Technical Specifications | Feature | Specification | | :--- | :--- | | **Part Number** | CTX100-2-52M-R | | **Inductance** | 100 µH (nominal) | | **Tolerance** | ±20% | | **Current Rating (Irms)** | ~2.18 Amperes | | **DC Resistance (DCR)** | ~0.116 Ohms (Max) | | **Core Material** | Iron Powder (Material -52) | | **Configuration** | Dual Winding (Octa-Pac) | | **Mounting Type** | Surface Mount (SMT) | --- ### 2. Key Features and Construction * **Dual Winding Design:** This part features two separate windings on a single core. This allows the component to be used as: * An inductor in series (higher inductance). * An inductor in parallel (higher current capacity). * A 1:1 transformer or common mode choke. * **Core Material (-52):** The suffix "-52" refers to the specific iron powder core material. It is known for low core losses at high frequencies and good stability, typically used in power conversion up to 500kHz. * **Octa-Pac Series:** This is part of the "Octa-Pac" family, designed for high power density and a low profile, making it suitable for compact PCB layouts. * **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and meets RoHS environmental standards. --- ### 3. Common Applications This specific inductor is widely used in power management circuits due to its versatility: 1. **DC-DC Converters:** Used as the energy storage element in Buck, Boost, or SEPIC converters. 2. **Input/Output Filters:** Functions as a filter to reduce electromagnetic interference (EMI) and ripple current. 3. **Isolation:** Can act as a basic isolation transformer for low-power signal or power transfer. 4. **Common Mode Choke:** When wired appropriately, it can suppress common-mode noise in power lines. --- ### 4. Connection Diagrams Because there are two windings, the behavior changes based on how you connect the pins: | Configuration | Inductance | Current Capacity | | :--- | :--- | :--- | | **Series** | 4x Base Inductance (400µH) | Base Current (1x) | | **Parallel** | Base Inductance (100µH) | 2x Base Current |