The part number **33N-R** typically refers to a **High Voltage Ceramic Disc Capacitor** produced by manufacturers like Murata or specialty electronic component suppliers. The "33N" signifies the capacitance value, while the "R" often denotes tolerance or temperature characteristics depending on the specific series. --- ### 1. Key Technical Specifications Below is a breakdown of the typical characteristics for a **33N-R** rated capacitor: | Feature | Specification | Details | | :--- | :--- | :--- | | **Capacitance** | 33nF (0.033µF) | "33N" translates to 33,000pF. | | **Component Type** | Ceramic Disc | Non-polarized, fixed capacitor. | | **Voltage Rating** | 1kV - 6kV | Common in high-voltage R-series lines. | | **Tolerance** | ±10% or ±20% | Standard for ceramic dielectric materials. | | **Mounting Type** | Through-Hole (THT) | Radial leads for PCB mounting. | --- ### 2. Nomenclature Breakdown Electronic components follow a specific coding logic. Here is how to read "33N-R": * **33:** The base value (significant digits). * **N:** The multiplier/unit. In this context, **N** stands for **Nanofarads (nF)**. * **R:** This suffix often refers to the **Temperature Coefficient** (e.g., SL or R characteristics in Murata’s old coding) or indicates compliance with **RoHS** (Lead-free) standards. --- ### 3. Common Applications These parts are designed for high-stress environments where voltage spikes are common. 1. **Power Supplies:** Used in the primary side of switching power supplies for snubbing circuits. 2. **Lighting Ballasts:** Found in fluorescent and LED drivers to filter high-frequency noise. 3. **TV/Monitors:** Historically used in CRT horizontal resonance circuits and modern backlight inverters. 4. **Surge Protection:** Acting as a bypass to ground for high-voltage transients. --- ### 4. Identifying the Manufacturer While "33N-R" is a generic descriptor, it is most commonly associated with **Murata's DE Series** or **Vishay's High Voltage** line. * *Note:* Always check the physical markings on the body (e.g., "333" which equals 33 followed by three zeros in pF) to confirm the value. ---