The **SCF110-16-R-1812** is a surface-mount (SMD) **Common Mode Choke** (Filter) designed by manufacturers like Signal Transformer (a Bel group company). It is primarily used for EMI (Electromagnetic Interference) suppression in high-speed data lines and power circuits. --- ### ## Technical Specifications Below are the primary electronic characteristics of this component: | Feature | Specification | | :--- | :--- | | **Component Type** | Common Mode Choke | | **Package Size** | 1812 (Metric 4532) | | **Inductance** | 11.0 µH (nominal) | | **Rated Current** | 1.6 A (Typical) | | **DC Resistance (DCR)** | ~0.06 Ω (Max) | | **Operating Temperature** | -40°C to +125°C | | **Mounting Type** | Surface Mount (SMD) | --- ### ## Key Electronic Functions 1. **EMI Suppression:** The device is designed to filter out "common mode" noise—noise that appears on both signal lines simultaneously—while allowing the desired differential signals to pass through with minimal distortion. 2. **High-Current Handling:** Unlike signal-level chokes, the "16" in the part number indicates a robust current rating (up to 1.6 Amps), making it suitable for small power supply rails or USB charging lines. 3. **Low DCR:** The low Direct Current Resistance ensures that there is minimal voltage drop and heat dissipation across the component during operation. --- ### ## Applications The SCF110 series in the 1812 footprint is commonly found in: * **Power Supplies:** Filtering DC-DC converters to prevent switching noise from leaking back into the system. * **CAN Bus / Industrial Interface:** Protecting communication lines from industrial electrical noise. * **Consumer Electronics:** Used in USB hubs, motherboards, and high-speed peripherals. --- ### ## Deciphering the Part Number | Code Segment | Meaning | | :--- | :--- | | **SCF** | Series Name (Signal Common Mode Filter) | | **110** | Inductance Code (11.0 µH) | | **16** | Rated Current (1.6 Amps) | | **R** | RoHS Compliant | | **1812** | Physical dimensions (0.18" x 0.12") |