The part number **CDR32BP220BFURAB** refers to a high-reliability, military-grade surface mount multilayer ceramic capacitor (MLCC). This specific component is manufactured following the **MIL-PRF-55681** standard, which is typically used in aerospace, defense, and high-reliability industrial applications. --- ### 1. Part Number Breakdown To understand the electronic characteristics, we can deconstruct the part number according to military coding standards: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **CDR32** | Series/Style | MIL-PRF-55681 / Size 1206 (3.2mm x 1.6mm) | | **BP** | Characteristic | COG/NPO (Ultra-stable dielectric, low loss) | | **220** | Capacitance | 22 pF (22 followed by 0 zeros) | | **B** | Capacitance Tolerance | ±5% | | **F** | Voltage Rating | 50 Volts | | **U** | Termination Finish | Standard "U" termination (Solderable) | | **R** | Failure Rate | Level R (0.01% per 1,000 hours) | | **AB** | Packaging/Testing | Standard Bulk or Specific Test Group | --- ### 2. Key Electronic Specifications The CDR32BP220BFURAB is defined by its stability and precision. * **Dielectric (BP/NPO):** This is a Class I dielectric. It is "ultra-stable," meaning its capacitance does not change significantly with temperature, voltage, or time. * **Temperature Coefficient:** 0 ± 30 ppm/°C over the range of -55°C to +125°C. * **Dissipation Factor:** Extremely low, which reduces energy loss and heat generation in high-frequency circuits. * **Failure Rate (R):** This indicates the component has undergone established reliability testing. "R" is a high-level reliability rating required for mission-critical hardware. --- ### 3. Common Applications Due to its military specification and high stability, this part is used in: 1. **RF Oscillators:** Maintaining a precise frequency across wide temperature ranges. 2. **Filtering:** High-frequency noise suppression in sensitive communication gear. 3. **Timing Circuits:** Where precision and low drift are required. 4. **Aerospace Avionics:** Where mechanical and electrical robustness is mandatory. --- ### 4. Comparison with Commercial Alternatives | Feature | CDR32BP220BFURAB (Military) | Standard Commercial 1206 MLCC | | :--- | :--- | :--- | | **Traceability** | Full lot traceability required | Usually not provided | | **Reliability** | Tested to specific failure rates (Level R) | Not rated for failure rate | | **Testing** | Visual, Mechanical, and Thermal Shock | Batch sample testing only | | **Cost** | Significantly Higher | Very Low |