The part number **MLP331M420EB0A** refers to a high-performance Aluminum Electrolytic Capacitor manufactured by **Cornell Dubilier (CDE)**. It belongs to the **MLP (Flatpack)** series, which is known for its ultra-low profile and high reliability in aerospace and military applications. --- ### 1. Technical Specifications Below are the primary electrical and physical characteristics of this specific component: | Feature | Specification | | :--- | :--- | | **Capacitance** | 330 µF (Microfarads) | | **Voltage Rating** | 420 VDC | | **Capacitance Tolerance** | ±20% (indicated by 'M') | | **Series** | MLP (Flatpack) | | **Case Type** | EB (Square/Rectangular Flatpack) | | **Operating Temperature** | -55°C to +105°C | | **Life Expectancy** | Up to 50 hours at 105°C (Longer at lower temps) | | **Construction** | Aluminum Electrolytic (Sintered) | --- ### 2. Breakdown of the Part Number The alphanumeric code follows a strict logic used by CDE: * **MLP**: Series name (Flatpack, High Energy Density). * **331**: Capacitance value. The first two digits (33) are significant figures, and the third (1) is the multiplier (10^1). Result: 330 µF. * **M**: Tolerance code (±20%). * **420**: Rated working voltage (420 Volts DC). * **EB**: Case code (Specifies the physical dimensions, approximately 1.5" x 1.75"). * **0**: Termination style (Standard plug-in/solder lead). * **A**: Insulation/Mounting style (typically refers to a specific wrap or mounting flange). --- ### 3. Key Advantages The MLP series is distinguished from standard radial or axial capacitors by its unique design: * **Flat Form Factor:** The rectangular "Flatpack" shape allows for much better space utilization on PCBs compared to traditional cylindrical cans. * **Thermal Efficiency:** The flat sides provide a larger surface area for heat dissipation or for mounting against a heatsink/cold plate. * **Vibration Resistance:** Due to their low profile and mounting style, they are highly resistant to mechanical shock and vibration (often rated for up to 80g). * **Hermetic-like Seal:** While not fully hermetic, the laser-welded construction provides excellent protection against electrolyte dry-out. --- ### 4. Common Applications Because of its high voltage (420V) and robust construction, this part is typically found in: 1. **Military/Aerospace Power Supplies:** High-voltage DC-DC converters. 2. **Bulk Storage:** Energy storage for laser pulse or strobe circuits. 3. **UPS Systems:** Uninterruptible power supplies where space is at a premium. 4. **Radar Systems:** Pulse power and filtering.