The **SLPX331M350A4P3** is a high-performance aluminum electrolytic capacitor manufactured by **Cornell Dubilier (CDE)**. It belongs to the **SLPX series**, which is designed for high voltage, compact size, and long life in power electronics. --- ### 1. Technical Specifications The part number can be broken down into specific technical parameters: | Parameter | Value | Description | | :--- | :--- | :--- | | **Capacitance** | 330 µF | Energy storage capacity (331 code) | | **Voltage Rating** | 350 VDC | Maximum operating DC voltage | | **Tolerance** | ±20% | Standard capacitance range (M) | | **Temperature Range** | -40°C to +85°C | Standard operating range for the series | | **Lifetime** | 3,000 Hours | Rated at 85°C with full ripple current | | **Mounting Type** | Snap-In | 2-pin through-hole terminals | | **Case Size** | 22mm x 45mm | Diameter (D) x Length (L) | --- ### 2. Physical & Mechanical Properties The "A4P3" suffix indicates specific physical dimensions and terminal styles: * **Case Diameter:** 22 mm (A code). * **Case Length:** 45 mm (4P3 code). * **Terminals:** Standard 6.3mm length snap-in pins. These pins are designed to hold the capacitor firmly to the PCB during the soldering process. * **Safety Vent:** Includes a built-in safety vent on the bottom or side to prevent explosion during failure. --- ### 3. Key Features * **High Ripple Current:** Designed to handle significant AC current superimposed on the DC voltage, which is common in power supplies. * **Low ESR:** Reduced Equivalent Series Resistance minimizes internal heating. * **Density:** Offers a 10% to 20% smaller case size than older electrolytic technologies with the same rating. --- ### 4. Typical Applications This specific capacitor is commonly found in the following electronic circuits: 1. **Switch Mode Power Supplies (SMPS):** Used for bulk filtering on the input or high-voltage side. 2. **Motor Drives/Inverters:** Providing DC bus voltage smoothing. 3. **Uninterruptible Power Supplies (UPS):** Energy storage for emergency power transition. 4. **Renewable Energy:** Filtering in solar inverters. --- ### 5. Part Number Breakdown Structure ```text SLPX 331 M 350 A 4 P 3 | | | | | | | | | | | | | | | +-- Lead Length (3 = 6.3mm) | | | | | | +----- Terminal Style (P = 2-pin) | | | | | +-------- Case Length (4 = 45mm) | | | | +----------- Case Diameter (A = 22mm) | | | +--------------- Voltage (350 = 350VDC) | | +------------------- Tolerance (M = ±20%) | +----------------------- Capacitance (331 = 330µF) +----------------------------- Series Name (SLPX 85°C Snap-in) ``` ---