The part number **RTT-35V681MKHT-R5** refers to a specific **Aluminum Electrolytic Capacitor**. These components are essential in electronic circuits for energy storage, filtering, and smoothing power supplies. --- ### 1. Technical Specification Breakdown The alphanumeric code follows a standard industry naming convention for passive components. Here is the breakdown: | Parameter | Value | Description | | :--- | :--- | :--- | | **Series** | RTT | High temperature, low impedance series. | | **Voltage Rating** | 35V | The maximum DC voltage the capacitor can handle. | | **Capacitance** | 681 (680µF) | "681" translates to 68 followed by 1 zero in picofarads, but for these series, it denotes 680 microfarads (µF). | | **Tolerance** | M | ±20% capacitance tolerance. | | **Temperature** | KHT | Typically indicates an operating range up to +105°C or +125°C. | | **Packaging/Size** | R5 | Refers to the physical dimensions and lead spacing (Radial leads). | --- ### 2. Key Physical & Electrical Characteristics * **Type:** Radial Leaded (Through-hole). This means it has two wires coming out of the bottom to be soldered into a PCB. * **Polarity:** As an electrolytic capacitor, it is **polarized**. It has a positive (+) and negative (-) terminal. Reversing the polarity can cause component failure or explosion. * **Low ESR:** The RTT series is designed for low "Equivalent Series Resistance," making it efficient for high-frequency applications. * **Longevity:** Rated for high endurance (often 2,000 to 5,000 hours at its maximum rated temperature). --- ### 3. Common Applications This specific capacitor (35V, 680µF) is commonly used in the following scenarios: 1. **Power Supply Filtering:** Smoothing the output of DC-DC converters or AC-DC adapters to remove voltage "ripple." 2. **Audio Circuits:** Used in power stages of amplifiers to maintain steady current. 3. **Industrial Electronics:** Due to its high temperature rating, it is suitable for power boards in industrial machinery. 4. **Motherboards:** Decoupling power to various integrated circuits. --- ### 4. Safety and Handling * **Voltage Margin:** It is best practice to use a capacitor at a voltage roughly **20% lower** than its rating (e.g., using this 35V cap in a 24V or 28V circuit). * **Heat:** Ensure adequate airflow, as heat is the primary factor that dries out the electrolyte inside, leading to failure.