The **14CEC-130A-R** is a specific electronic component, primarily categorized as a **Surface Mount (SMT) Common Mode Choke**. These components are essential in power supply designs and data lines to suppress electromagnetic interference (EMI) and radio-frequency interference (RFI). Below is a detailed breakdown of its specifications, functions, and typical applications. --- ### 1. Technical Specifications The "14CEC" series typically follows standard industry parameters for common mode filters. | Feature | Specification (Typical) | | :--- | :--- | | **Component Type** | Common Mode Choke / Filter | | **Mounting Type** | Surface Mount Device (SMD/SMT) | | **Impedance** | ~130 Ohms (at 100MHz) | | **Current Rating** | High Current Capacity (varies by specific sub-batch) | | **DC Resistance (DCR)** | Low (to minimize power loss) | | **RoHS Status** | Compliant (indicated by the "-R" suffix) | --- ### 2. Key Functions The 14CEC-130A-R serves three primary purposes in a circuit: 1. **Noise Suppression:** It filters out "Common Mode" noise—signals that appear on both lines of a differential pair—while allowing the desired "Differential Mode" signals to pass through. 2. **EMI Reduction:** It prevents high-frequency noise generated by the device from escaping into the power lines or radiating into the environment. 3. **Signal Integrity:** By cleaning up the signal path, it ensures that data or power transmission remains stable in noisy electrical environments. --- ### 3. Internal Construction Common mode chokes like this one consist of: * **Ferrite Core:** A magnetic ring or block that provides the necessary inductance. * **Dual Windings:** Two separate coils of wire wrapped around the same core. The magnetic fields from the supply and return currents cancel each other out for differential signals but add together to block common-mode noise. --- ### 4. Typical Applications You will commonly find this part in the following areas: * **Power Supplies:** Switch-mode power supplies (SMPS) and DC-DC converters. * **Consumer Electronics:** Laptop adapters, LED lighting drivers, and smart home hubs. * **Data Lines:** USB 2.0/3.0 interfaces and IEEE 1394 (FireWire) ports. * **Industrial:** Motor control circuits and sensor interfaces where electrical noise is prevalent. --- ### 5. Identification Code Breakdown * **14CEC:** The series designation (likely referring to the physical size or core material). * **130:** Represents the nominal impedance (130 Ohms). * **A:** Design or tolerance revision code. * **-R:** Indicates **RoHS compliance** (Lead-free and environmentally friendly).