The **MA75TAG-R** is a specific electronic component belonging to the family of high-performance **RF (Radio Frequency) Capacitors**, typically manufactured by companies like ATC (American Technical Ceramics), now part of AVX/Kyocera. These parts are designed for high-power, high-frequency applications where stability and low loss are critical. --- ### 1. Part Number Breakdown While specific prefixes can vary by manufacturer, the breakdown for the MA series generally follows this logic: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **MA** | Series | High-Q Microwave Multi-Layer Ceramic Capacitor (MLCC). | | **75** | Voltage/Size | Often denotes a voltage rating or physical case size (e.g., 1111 size). | | **T** | Temperature Coeff | Typically indicates P90 (Positive 90 ppm/°C) or NP0 stability. | | **AG** | Capacitance | Numerical code for capacitance value (e.g., 7.5 pF). | | **-R** | Termination/RoHS | Indicates Lead-Free / RoHS Compliant finish. | --- ### 2. Key Technical Specifications These components are engineered for "High-Q" performance, meaning they have extremely low energy dissipation. * **Capacitance:** Typically in the low picofarad (pF) range. * **Operating Frequency:** Optimized for VHF, UHF, and Microwave bands (up to several GHz). * **ESR (Equivalent Series Resistance):** Ultra-low ESR to minimize heat generation in high-power transmitters. * **Voltage Rating:** Often rated for 50V to 500V depending on the specific sub-series. * **Dielectric:** Usually a porcelain or high-stability ceramic material. --- ### 3. Common Applications The MA75TAG-R and similar capacitors are found in hardware where signal integrity is paramount: 1. **RF Power Amplifiers:** Used for DC blocking and matching networks. 2. **Filter Networks:** High-Q factors allow for very sharp "cut-off" frequencies in bandpass filters. 3. **Antenna Tuning Units:** Used to match the impedance of an antenna to a transmitter. 4. **Medical Equipment:** Often used in MRI coils due to their non-magnetic properties (if specified) and high voltage stability. --- ### 4. Physical Characteristics * **Form Factor:** Surface Mount Device (SMD). * **Construction:** Multilayer construction with silver or gold-plated terminations for optimal conductivity. * **Stability:** Designed to maintain its capacitance value across a wide temperature range without "drifting." ---