The part number **EKMG161ESS331MMP1S** refers to a high-quality aluminum electrolytic capacitor manufactured by **United Chemi-Con (UCC)**. It belongs to the **KMG Series**, which is designed for general-purpose applications requiring high reliability and a wide temperature range. --- ### 1. Technical Specifications Breakdown The part number follows a specific nomenclature that describes its electrical and physical characteristics: | Parameter | Specification | | :--- | :--- | | **Series** | KMG (General Purpose, Radial Lead) | | **Capacitance** | 330 µF | | **Voltage Rating** | 160 VDC | | **Tolerance** | ±20% (M) | | **Temperature Range** | -55°C to +105°C | | **Endurance (Life)** | 2,000 Hours at 105°C | | **Case Size (D x L)** | 18mm x 31.5mm (approximate) | | **Lead Style** | Straight leads, Bulk packaging | --- ### 2. Key Features and Construction * **Electrolyte Type:** Wet aluminum electrolytic. This provides high capacitance-to-volume efficiency. * **Operating Temperature:** Rated for **105°C**, making it more robust than standard 85°C capacitors. This ensures stability in environments with moderate heat dissipation. * **Polarized:** This is a polarized component; the negative lead must be oriented correctly according to the stripe on the sleeve to prevent component failure. * **RoHS Compliant:** The "S" suffix typically denotes compliance with environmental standards regarding hazardous substances. --- ### 3. Common Applications Due to its voltage rating (160V) and capacitance (330µF), this part is commonly used in the following circuits: 1. **Switching Power Supplies (SMPS):** Used in the secondary filter stage or as a buffer for mid-range DC voltages. 2. **LED Drivers:** Provides smoothing and energy storage for high-brightness LED arrays. 3. **DC-DC Converters:** Acts as an input/output filter to reduce ripple current. 4. **Industrial Electronics:** Used in motor controllers and control boards where 110V-120V rectified DC is present. --- ### 4. Part Number Decoding Table | Code Segment | Meaning | Detail | | :--- | :--- | :--- | | **EKMG** | Series Name | KMG Series (105°C Standard) | | **161** | Voltage Code | 160 Volts (16 + 1 zero) | | **ESS** | Lead/Packaging | Straight Lead, Bulk | | **331** | Capacitance Code | 330 µF (33 + 1 zero) | | **M** | Tolerance | ±20% | | **MP1S** | Case Code | Dimensions and internal material spec | ---