### CDR04BP102BFURAJ Technical Overview The part number **CDR04BP102BFURAJ** refers to a high-reliability, military-grade surface mount multilayer ceramic capacitor (MLCC). These components are designed for mission-critical applications where failure is not an option, such as aerospace, defense, and medical instrumentation. --- ### 1. Component Specifications The following table breaks down the electrical and physical characteristics based on the standard MIL-PRF-55681 nomenclature. | Feature | Specification | Detail | | :--- | :--- | :--- | | **Capacitance** | 1000 pF (1.0 nF) | "102" = 10 followed by 2 zeros | | **Tolerance** | ±1% (B) | High precision for timing/filtering | | **Voltage Rating** | 100 VDC | Rated DC working voltage | | **Dielectric** | BP (NPO/COG) | Ultra-stable; 0 ± 30 ppm/°C | | **Case Size** | 1812 (Inch) | Large footprint for high power/voltage | | **Reliability Level** | R (0.01% / 1000 hrs) | Established Reliability (ER) rating | | **Termination** | U (Solderable) | Base metal with solder plating | --- ### 2. Breakdown of the Part Number The military part number follows a specific coding sequence: * **CDR04**: Indicates the style and physical size (1812 surface mount). * **BP**: The characteristic/dielectric code. **BP** corresponds to the **NPO (C0G)** material, which is the most stable capacitor dielectric. It does not change significantly with temperature, voltage, or time. * **102**: The capacitance value. 10 is the base, and 2 is the multiplier (10 x 10^2 = 1000pF). * **B**: The capacitance tolerance (±1%). * **F**: The operating voltage (F = 100V). * **U**: Termination finish (typically Barrier Layer, Tin/Lead Solder Plated). * **R**: The failure rate (R-level is a high-reliability standard). * **AJ**: Packaging or specific group testing code (standard commercial/military bulk or tape). --- ### 3. Key Applications Because this is a **MIL-PRF-55681** qualified part, it is used in environments that require: 1. **Low Loss:** Excellent for high-frequency applications. 2. **Temperature Stability:** Maintaining precise capacitance from -55°C to +125°C. 3. **Durability:** Resistance to thermal shock and mechanical stress in military hardware. ---