The **CSR33B565JS** is a high-reliability tantalum capacitor, typically manufactured according to military specifications (MIL-PRF-39003). These components are designed for critical applications where stability, longevity, and durability are paramount. --- ### 1. Part Number Breakdown Understanding the alphanumeric code helps identify the specific technical characteristics of the component: | Segment | Meaning | Detail | | :--- | :--- | :--- | | **CSR** | Style | Polarized Tantalum Capacitor (Established Reliability) | | **33** | Case Size | Physical dimensions (Case Size B) | | **B** | Voltage Rating | 6 Volts DC | | **565** | Capacitance | 5.6 microfarads (µF) | | **J** | Tolerance | ±5% | | **S** | Failure Rate | 0.001% per 1,000 hours (Exponential) | --- ### 2. Key Technical Specifications Based on the **MIL-PRF-39003/06** standard, here are the primary electrical characteristics: * **Capacitance:** 5.6 µF * **Voltage:** 6V DC (Working Voltage) * **Tolerance:** ±5% (High precision for tantalum) * **Dielectric:** Tantalum Pentoxide ($Ta_2O_5$) * **Case Type:** Hermetically sealed metal case with axial leads. * **Operating Temperature:** -55°C to +125°C. --- ### 3. Construction and Reliability Tantalum capacitors like the CSR33B565JS are "Solid Tantalum" capacitors. Unlike aluminum electrolytic capacitors, they do not contain a liquid electrolyte, which prevents drying out and extends shelf life indefinitely. #### Features: 1. **Hermetic Seal:** The metal case is vacuum-sealed to prevent moisture ingress, ensuring stability in harsh environments (high humidity or vacuum). 2. **Failure Rate Levels:** The "S" rating signifies the highest level of reliability, often required for aerospace, medical implants, and defense systems. 3. **Low ESR:** Compared to standard electrolytics, these have relatively low Equivalent Series Resistance, though higher than modern ceramic (MLCC) capacitors. --- ### 4. Common Applications Due to its military-grade certification and high cost compared to commercial parts, this component is used in: * **Aerospace Electronics:** Satellite power management and navigation systems. * **Defense Systems:** Missile guidance and secure communication hardware. * **Oil & Gas:** Downhole drilling tools where high temperatures and vibration are present. * **Long-term Timing Circuits:** Where capacitance stability over years is required. ---