The **SLP331M350C4P3** is a high-voltage, snap-in aluminum electrolytic capacitor manufactured by **Cornell Dubilier (CDE)**. It is part of the SLP series, known for its compact size, high voltage ratings, and long-term reliability. --- ### 1. Key Technical Specifications The part number encodes the primary electrical characteristics of the component: | Parameter | Value | | :--- | :--- | | **Capacitance** | 330 µF (Microfarads) | | **Voltage Rating** | 350 VDC | | **Tolerance** | ±20% | | **Temperature Range** | -25°C to +105°C | | **Load Life** | 3,000 Hours @ 105°C | | **Termination Style** | Snap-In (2 Pins) | | **Case Size (D x L)** | 25mm x 40mm | --- ### 2. Breakdown of the Part Number Understanding the nomenclature helps in identifying equivalent parts: * **SLP**: Series Name (105°C Snap-In Aluminum Electrolytic). * **331**: Capacitance Code. The first two digits are significant figures, the third is the multiplier ($33 \times 10^1 = 330$). * **M**: Tolerance ($\pm 20\%$). * **350**: Rated Voltage ($350$ Volts DC). * **C4**: Case Code (Refers to the physical diameter and length, specifically $25 \times 40$ mm). * **P3**: Lead/Terminal Style (Standard 2-pin snap-in, 6.3mm length). --- ### 3. Application and Usage Because of its high voltage rating and "snap-in" physical stability, this part is typically used in power electronics. #### Typical Circuits: * **Switch Mode Power Supplies (SMPS):** Used as a bulk storage capacitor on the input side to filter rectified AC mains. * **Motor Drives/Inverters:** Providing energy storage for DC bus links. * **Uninterruptible Power Supplies (UPS):** Handling high-voltage DC energy buffers. * **Solar Inverters:** Filtering DC input from PV panels. #### Key Advantages: 1. **Compact Density:** High capacitance-to-volume ratio compared to older screw-terminal models. 2. **Thermal Stability:** Rated for 105°C, making it suitable for enclosed power supplies where internal heat is a factor. 3. **Vibration Resistance:** The "snap-in" terminals provide a secure mechanical connection to the PCB before and after soldering. --- ### 4. Comparison with Similar Components If you are sourcing this part, keep in mind the ESR (Equivalent Series Resistance) and Ripple Current: | Feature | SLP331M350C4P3 | Standard 85°C Equivalent | | :--- | :--- | :--- | | **Heat Tolerance** | High (105°C) | Moderate (85°C) | | **Longevity** | Better (High ripple handling) | Standard | | **Footprint** | 25mm Diameter | May vary (22mm to 30mm) |