The **CTX8-2A-R** is a specific electronic component manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the **OCTA-PAC® PLUS** series of power inductors/transformers. --- ## 1. Component Overview The CTX8-2A-R is a versatile **dual-winding toroidal inductor**. Because it contains two separate windings on a single core, it can be configured as an inductor (series/parallel), a 1:1 transformer, or a common-mode choke. ### Technical Specifications | Parameter | Value / Description | | :--- | :--- | | **Inductance (Parallel)** | ~8.4 µH | | **Inductance (Series)** | ~33.7 µH | | **Current Rating (Parallel)** | ~3.16 Amps | | **DCR (Direct Current Resistance)** | ~0.043 Ohms | | **Mounting Type** | Surface Mount (SMD) | | **Operating Temperature** | -40°C to +125°C | | **Package/Case** | Size 2 (approx. 11.4mm x 11.4mm) | --- ## 2. Key Features * **High Efficiency:** Uses a low-loss iron powder core material, making it ideal for high-frequency power applications. * **Dual Winding:** Provides flexibility. The two windings can be connected in series or parallel to double the inductance or the current capacity, respectively. * **Magnetic Shielding:** The toroidal shape naturally contains the magnetic flux, reducing Electromagnetic Interference (EMI) with surrounding components. * **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and meets environmental standards. --- ## 3. Common Applications This part is frequently used in power management circuits where space is limited but high performance is required: 1. **DC-DC Converters:** Used in Buck, Boost, and SEPIC topologies. 2. **Transformers:** Can function as a 1:1 isolation transformer or flyback transformer. 3. **Filtering:** Acts as a common-mode choke to filter out noise in data lines or power supplies. 4. **Battery Powered Equipment:** Due to its high energy density and compact size. --- ## 4. Connection Diagram (Internal) ```text Winding 1: Pins 1 --- 2 Winding 2: Pins 4 --- 3 - Parallel: Connect 1 & 4, and 2 & 3 (Higher Current) - Series: Connect 2 & 4 (Higher Inductance) ```