## CTX8-4P-R: Technical Overview The **CTX8-4P-R** is a high-performance **shielded drum core power inductor** manufactured by Eaton (formerly Cooper Bussmann/Coiltronics). It is part of the Octa-Path series, known for its versatility and compact surface-mount design. ### 1. Key Specifications The following table summarizes the primary electrical and physical characteristics: | Property | Value / Specification | | :--- | :--- | | **Inductance** | 8.3 µH (at 0A DC) | | **Current Rating (Irms)** | 1.84 Amps | | **Saturation Current (Isat)** | 2.15 Amps | | **DC Resistance (DCR)** | ~0.0461 Ohms (Max) | | **Tolerance** | ±20% | | **Operating Temperature** | -40°C to +125°C | | **Shielding** | Magnetically Shielded | | **Package/Case** | SMD (Size 8: approx. 12.5mm x 12.5mm) | --- ### 2. Physical Construction The "4P" in the part number indicates a specific configuration within the Octa-Path family: * **Core Material:** Ferrite drum core with a magnetic shield (sleeve). This minimizes Electromagnetic Interference (EMI) by containing the magnetic flux. * **Winding:** High-conductivity copper wire. * **Termination:** Lead-free (RoHS compliant), denoted by the **-R** suffix. * **Design:** Designed for surface mount technology (SMT) with a robust base for pick-and-place assembly. --- ### 3. Applications and Usage The CTX8-4P-R is commonly found in power management circuits where high efficiency and low EMI are critical. * **DC-DC Converters:** Used as a storage inductor in Buck (Step-down), Boost (Step-up), and SEPIC converters. * **Filtering:** Acts as a low-pass filter to smooth out ripple current in power supplies. * **Industrial Electronics:** Due to its wide temperature range, it is suitable for industrial control systems and sensors. * **Consumer Electronics:** Found in high-end audio equipment or computer peripherals where noise suppression is vital. --- ### 4. Part Number Breakdown Understanding the Eaton nomenclature helps in identifying variations: | Segment | Meaning | | :--- | :--- | | **CTX** | Octa-Path Series Product Code | | **8** | Physical Size/Case Dimension | | **4P** | Inductance Code / Winding Configuration | | **-R** | RoHS Compliant / Lead-Free |