The part number **398LBA035M2AD** refers to a high-performance **Aluminum Electrolytic Capacitor**, typically manufactured by **Illinois Capacitor** (now part of Cornell Dubilier/CDE). It belongs to the **LBA series**, which is designed for high ripple current and long life in power supply applications. --- ### 1. Technical Specifications The part number is an alphanumeric code that defines the electrical and physical characteristics of the component. | Parameter | Value | | :--- | :--- | | **Capacitance** | 3,900 µF (Microfarads) | | **Voltage Rating** | 35 VDC | | **Tolerance** | ±20% (M) | | **Termination Style** | Snap-In (2-pin) | | **Operating Temperature** | -40°C to +105°C | | **Series** | LBA (High Ripple Current / Long Life) | | **Lifetime** | ~3,000 Hours at 105°C | --- ### 2. Breakdown of the Part Number Decoding the specific segments of **398LBA035M2AD**: * **398**: Represents the capacitance. The first two digits are significant figures, and the third is the multiplier (10^8 pF). Thus, $39 \times 10^8$ pF = 3,900,000,000 pF = **3,900 µF**. * **LBA**: The product series identifier. * **035**: The Working Voltage (WVDC). In this case, **35 Volts**. * **M**: The tolerance code ($M = \pm20\%$). * **2AD**: Physical case size and lead configuration code (typically refers to diameter and height, e.g., 22x30mm or similar depending on the specific catalog datasheet). --- ### 3. Key Features & Applications This specific capacitor is engineered for reliability in demanding environments. #### Features: * **Snap-In Terminals:** Designed for easy PCB mounting and stability against vibration. * **High Ripple Current:** Capable of handling significant AC components superimposed on the DC voltage. * **Polarized:** Must be installed with correct polarity (anode/cathode). #### Common Applications: 1. **Switching Power Supplies (SMPS):** Used for filtering and smoothing rectified AC. 2. **Audio Amplifiers:** Providing a steady "reservoir" of power for peak demands. 3. **Industrial Controls:** Powering motor drives or automation logic. 4. **Inverters:** Essential in DC-to-AC conversion circuits. --- ### 4. Physical Handling Precautions When working with the 398LBA035M2AD, observe the following: * **Polarity:** Ensure the negative stripe on the casing aligns with the negative terminal on the PCB. * **Discharge:** Large capacitors can hold a lethal charge even after power is removed. Always discharge through a resistor before handling.