The **CTX100-1-R** is a high-performance, surface-mount (SMT) power inductor manufactured by **Eaton (formerly Cooper Bussmann/Coiltronics)**. It is part of the **OCTA-PAC** series, known for its versatility in power conversion applications. --- ## 1. Key Technical Specifications The following table summarizes the primary electrical and physical characteristics of the CTX100-1-R: | Parameter | Specification | | :--- | :--- | | **Inductance** | 100 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 0.65 Amps | | **Peak Current (Isat)** | 0.82 Amps | | **DC Resistance (DCR)** | 0.606 Ohms (Max) | | **Operating Temperature** | -40°C to +125°C | | **Mounting Type** | Surface Mount (SMD) | | **Core Material** | Powdered Iron (Toroidal) | --- ## 2. Core Features and Design The "R" in the part number denotes that the component is **RoHS compliant**. The CTX100-1-R is designed with several specific engineering advantages: ### A. Toroidal Geometry The inductor uses a toroidal (ring-shaped) core. This design is highly efficient because it inherently contains the magnetic flux within the core, resulting in: * **Low EMI:** Minimal electromagnetic interference with surrounding components. * **High Efficiency:** Lower core losses compared to traditional E-core shapes. ### B. Octa-Pac Construction The "1" in the part number refers to the size (Size 1). These inductors are wound on a header that allows for secure surface mounting and automated pick-and-place assembly. ### C. Thermal Stability Designed to withstand high reflow temperatures, it maintains stable inductance across a wide temperature range, making it suitable for automotive and industrial environments. --- ## 3. Common Applications The CTX100-1-R is primarily used in power management circuits where compact size and low noise are critical: 1. **DC-DC Converters:** Used as an energy storage element in buck, boost, or buck-boost regulators. 2. **Input/Output Filters:** Filtering high-frequency noise in switching power supplies. 3. **Telecom Equipment:** Providing stable power to sensitive communication boards. 4. **Computer Peripherals:** Voltage regulation for CPUs and memory modules on motherboards. --- ## 4. Comparison with Alternatives If the CTX100-1-R does not fit your specific power envelope, the series offers variations: * **CTX100-2-R:** Larger size with higher current handling capabilities. * **CTX100-1P-R:** "PLUS" version with higher power density and lower DCR for the same footprint.