## CTX047-1P-R Technical Overview The **CTX047-1P-R** is a specialized electronic component primarily categorized as a **Common Mode Choke** (or sometimes utilized as a high-current power inductor). It is manufactured by **Eaton (formerly Bussmann/Coiltronics)** as part of their **OCTA-PAC®** series. --- ### 1. Key Technical Specifications | Parameter | Value / Description | | :--- | :--- | | **Manufacturer** | Eaton (Coiltronics) | | **Inductance** | 4.7 µH (approximate, varies by configuration) | | **Current Rating** | High Current (Typically 1.0A to 5.0A depending on circuit) | | **Mounting Type** | Surface Mount (SMD) | | **Configuration** | Dual Winding (Toroidal Core) | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Physical Construction & Design The "R" suffix indicates that the part is **RoHS Compliant**. The component features several distinct physical traits: * **Toroidal Core:** Uses a powdered iron or ferrite ring core which offers high efficiency and low electromagnetic interference (EMI). * **Dual Windings:** It contains two separate copper wire windings on a single core. This allows the part to be used in multiple circuit topologies. * **Packaging:** It is housed in an "OCTA-PAC" surface-mount package, which provides a stable base for automated pick-and-place assembly. --- ### 3. Electronic Functions and Applications Because it contains two windings, the CTX047-1P-R is highly versatile: 1. **Common Mode Choke:** When the windings are used in series, it filters out high-frequency noise that is common to both power lines. 2. **Transformer:** It can act as a 1:1 isolation transformer or a basic step-up/step-down component in low-power applications. 3. **Inductor:** The windings can be connected in **series** (to increase inductance) or in **parallel** (to increase current handling capacity). #### Common Use Cases: * **DC-DC Converters:** Used in Buck, Boost, and SEPIC topologies. * **EMI Filtering:** Suppressing noise in switching power supplies. * **Signal Isolation:** Protecting sensitive data lines from power surges. --- ### 4. Circuit Wiring Options Depending on how you solder the pins to your PCB, the behavior changes: ```text Parallel Connection: (Pin 1 to 2) + (Pin 4 to 3) -> Lower Inductance, Double Current Capacity Series Connection: (Pin 2 connected to 4) -> Quadruple Inductance, Standard Current Capacity ```