The **HT-35V680MF80N-R2** is a specific part number for a surface-mount (SMD) aluminum electrolytic capacitor. This component is typically designed for high-temperature stability and low impedance applications. --- ### 1. Part Number Breakdown While naming conventions can vary slightly by manufacturer (often associated with brands like Huatong or similar high-reliability electronic component producers), the code typically follows this logic: | Segment | Interpretation | Description | | :--- | :--- | :--- | | **HT** | Series Type | Often indicates a High-Temperature or Low Impedance series. | | **35V** | Rated Voltage | Maximum operating voltage is **35 Volts DC**. | | **680** | Capacitance | 680 microfarads (**680µF**). | | **M** | Tolerance | Standard tolerance of **±20%**. | | **F80** | Case Size | Often refers to dimensions (e.g., 10mm diameter x 10.2mm height). | | **N-R2** | Packaging/RoHS | Indicates Tape & Reel packaging and RoHS compliance. | --- ### 2. Technical Specifications Based on the standard parameters for this class of electrolytic capacitor: * **Type:** Aluminum Electrolytic (Polarized). * **Mounting Type:** SMD (Surface Mount Device) / V-Chip. * **Capacitance:** 680 µF. * **Voltage Rating:** 35V DC (Surge voltage usually 20% higher). * **Operating Temperature:** Typically -55°C to +105°C. * **Life Endurance:** Usually rated for 2,000 to 5,000 hours at maximum temperature. --- ### 3. Key Applications Because of its high capacitance and mid-range voltage, this part is commonly found in: 1. **Power Supplies:** Used for filtering ripple current in DC-DC converters. 2. **Consumer Electronics:** Found in motherboards, LED drivers, and audio equipment. 3. **Automotive/Industrial:** Used in modules requiring stable power delivery under thermal stress. 4. **Decoupling:** Providing a local energy reservoir for integrated circuits to prevent voltage drops. --- ### 4. Comparison Table: Electrolytic vs. Ceramic (MLCC) In the context of a 680µF value, here is why an electrolytic part like this is chosen: | Feature | HT-35V680MF80N-R2 (Electrolytic) | Standard Ceramic (MLCC) | | :--- | :--- | :--- | | **Capacitance Density** | Very High (Easy to hit 680µF) | Low (Hard/Expensive to hit 680µF) | | **Cost** | Low for high values | High for high values | | **Polarity** | Polarized (Must observe +/-) | Non-polarized | | **Stability** | Ages over time | Very stable |