The **MA7HTCA-R** is a specific part number belonging to the **MA series** of high-temperature, molded axial inductors, typically manufactured by companies like **Delevan**. These components are engineered for high reliability in extreme environments. ### 1. Technical Specifications Table | Parameter | Specification | | :--- | :--- | | **Component Type** | Fixed Inductor (Molded Axial) | | **Inductance Range** | Typically 0.10 µH to 10,000 µH (Series dependent) | | **Tolerance** | ±5% or ±10% (standard) | | **Operating Temperature** | -55°C to +125°C | | **Core Material** | Iron, Ferrite, or Phenolic (depending on value) | | **Termination Finish** | RoHS compliant (Lead-free) | | **Packaging** | Axial Leaded / Tape & Reel (R suffix) | --- ### 2. Key Features and Construction * **Molded Construction:** The "M" in the prefix generally indicates a molded epoxy housing. This provides excellent mechanical strength and protection against moisture and environmental contaminants. * **High Temperature (HT):** The "HT" designation signifies that the internal wiring and insulation are rated for higher thermal stability compared to standard commercial inductors. * **Military/Aerospace Standards:** These parts are often designed to meet or exceed **MIL-PRF-15305** standards, ensuring performance under high vibration and shock. * **Shielding:** While many axial inductors are non-shielded, the MA7 series often utilizes specific winding techniques to minimize EMI (Electromagnetic Interference). --- ### 3. Part Number Breakdown While exact manufacturer codes vary slightly, the nomenclature usually follows this logic: 1. **MA7:** The Series designation (Molded Axial, Size Class 7). 2. **HT:** High-Temperature rating. 3. **CA:** Specific inductance value and tolerance code (e.g., specific microhenry rating). 4. **-R:** Indicates **RoHS Compliance** or **Reel Packaging** (typically Tape and Reel). --- ### 4. Common Applications * **Aerospace & Defense:** Used in flight control systems and ruggedized communication gear. * **Industrial Sensors:** High-reliability filtering for sensors located near heat-generating machinery. * **Power Supplies:** Used as a choke for noise filtering in DC-DC converters. * **RF Circuits:** Decoupling and parasitic suppression in high-frequency applications. ---