The part number **NCD682D2KVY5PD2LSTR25LSF** refers to a high-voltage ceramic disc capacitor. These components are commonly used in power supplies, lighting ballasts, and industrial equipment for decoupling, bypass, and snubbing applications. Below is a detailed breakdown of the technical specifications based on the standardized coding for such components. --- ### 1. Technical Specifications Table | Parameter | Specification | Description | | :--- | :--- | :--- | | **Capacitance** | 6800 pF (6.8 nF) | "682" indicates 68 followed by two zeros. | | **Voltage Rating** | 2000V (2kV) | High dielectric strength for HV circuits. | | **Dielectric Material** | Y5P | Class II ceramic; stable within ±10% from -30°C to +85°C. | | **Tolerance** | ±0.5pF or ±20% | Depending on specific series binning (often 'M' or 'D'). | | **Mounting Type** | Through-Hole | Radial leaded configuration. | | **Packaging** | Tape & Reel / Ammo | Indicated by "TR" in the suffix. | --- ### 2. Part Number Breakdown The long alphanumeric string contains specific manufacturing instructions: * **NCD**: Series prefix (typically High Voltage Ceramic Disc). * **682**: Capacitance code ($68 \times 10^2$ picofarads). * **D**: Tolerance code (often denotes a specific precision range). * **2KV**: Rated DC working voltage ($2,000$ Volts). * **Y5P**: Temperature coefficient (The most stable of the Class II ceramics). * **LSTR**: Lead style and Taping specification (Long Straight Leads / Tape & Reel). * **25LSF**: Lead spacing and RoHS compliance (2.5mm or 5mm lead spacing/Lead-Free). --- ### 3. Key Functional Features #### A. Dielectric Characteristics (Y5P) The **Y5P** material is a "Mid-K" ceramic. It offers a good balance between size and stability. Unlike Y5V (which can lose significant capacitance with temperature), Y5P remains relatively predictable, making it suitable for circuits where timing or filtering consistency is required. #### B. High Voltage Capability Rated at **2kV**, this part is designed to withstand transient voltage spikes. It is frequently used in: * **Snubber Circuits:** To protect MOSFETs/IGBTs from inductive kickback. * **DC-DC Converters:** Filtering input/output noise in high-power modules. * **AC Line Filtering:** Acting as a safety or bypass capacitor (though it must meet X/Y safety ratings if used across mains). #### C. Physical Construction The "Disc" format involves a ceramic wafer coated with silver electrodes, encapsulated in a flame-retardant epoxy resin. This provides moisture resistance and electrical insulation. --- ### 4. Application Summary This specific capacitor is ideal for **Power Electronics**. If you are replacing this part, ensure the replacement has a voltage rating of at least **2kV** and a **Y5P** or **X7R** dielectric. Using a lower-quality dielectric (like Y5V) could result in circuit instability under heat.