## Technical Overview: CSR09B565JS The **CSR09B565JS** is a high-reliability, military-grade solid tantalum capacitor. It is designed to meet the **MIL-PRF-39003** standard, specifically the **CSR09** style, which denotes a hermetically sealed, polar tantalum capacitor with axial leads. --- ### 1. Part Number Breakdown To understand the electronic characteristics, we can decode the part number according to military specifications: | Segment | Code | Meaning | |:--- |:--- |:--- | | **Style** | CSR09 | Tantalum, solid electrolyte, polar, hermetically sealed, axial leads. | | **Voltage** | B | Rated for **6 Volts DC**. | | **Capacitance** | 565 | 5.6 μF (56 followed by 5 zeros in picofarads). | | **Tolerance** | J | **±5%** Capacitance tolerance. | | **Failure Rate** | S | **0.001% per 1,000 hours** (Exponential failure rate). | --- ### 2. Key Electrical Specifications These parameters define how the component performs within a circuit: * **Capacitance:** 5.6 μF * **Voltage Rating:** 6 VDC (Operating), 8 VDC (Surge) * **Tolerance:** ±5% (High precision for tantalum) * **Operating Temperature:** -55°C to +125°C * **Dissipation Factor:** Typically < 4% (at 120Hz) * **Leakage Current:** Very low (measured in microamps), consistent with hermetic sealing. --- ### 3. Construction and Materials The CSR09 series is built for extreme environments where commercial capacitors might fail. * **Hermetic Seal:** The component is encased in a metal tube with glass-to-metal seals at the ends. This prevents moisture ingress and electrolyte drying. * **Axial Leads:** Designed for through-hole mounting. The positive lead is usually identified by a "plus" sign or a bevel on the case. * **Solid Electrolyte:** Uses Manganese Dioxide ($MnO_2$), which offers better stability over time and temperature compared to liquid electrolytes. --- ### 4. Common Applications Due to the **"S" failure rate** (Exponential) and military qualification, this part is used in: 1. **Aerospace & Defense:** Avionics, missile guidance systems, and satellite communication. 2. **Medical Electronics:** Critical life-support or monitoring equipment requiring long-term stability. 3. **Industrial Controls:** High-reliability sensors in harsh environments. --- ### 5. Equivalent Reference If sourcing a commercial equivalent (non-military), one would look for the **KEMET T212** or **Vishay 150D** series with identical electrical ratings, though these lack the rigorous military "S" level reliability testing.