The **MAH78FAX-R** is a specific surface-mount (SMT) common mode choke (filter) often utilized in automotive and high-speed data communication electronics. It is part of a series designed to suppress electromagnetic interference (EMI) in signal lines. --- ### 1. Technical Specifications Below are the typical technical parameters associated with this component type: | Parameter | Specification (Typical) | | :--- | :--- | | **Component Type** | Common Mode Choke / EMI Filter | | **Inductance** | Usually 75µH to 100µH (varies by sub-version) | | **Rated Current** | ~150mA to 300mA | | **DC Resistance (DCR)** | Max 1.5 Ω to 2.5 Ω | | **Voltage Rating** | 50V - 80V DC | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 1812 (4532 Metric) | --- ### 2. Core Functions The MAH78FAX-R serves two primary electronic purposes: 1. **Noise Suppression:** It filters out "Common Mode" noise—interference that travels in the same direction on both signal lines—while allowing the actual "Differential" data signal to pass through unaffected. 2. **Signal Integrity:** It is specifically tuned for high-speed protocols where maintaining the shape of the data waveform is critical. --- ### 3. Applications This part is commonly found in the following environments: * **CAN-Bus (Controller Area Network):** Used extensively in automotive ECUs (Electronic Control Units) to prevent engine noise from disrupting data. * **FlexRay / Ethernet:** Used in vehicle-to-everything (V2X) communication modules. * **Industrial Automation:** Protecting sensor data lines from heavy machinery interference. --- ### 4. Mounting and Manufacturing The "-R" suffix typically denotes **RoHS compliance** and **Tape & Reel** packaging for automated pick-and-place assembly. ```yaml Part_Number: MAH78FAX-R Mounting_Type: Surface Mount (SMD) Terminal_Finish: Matte Tin (Sn) Material: Ferrite Core with Copper Winding ``` ---