The **125LD47-R** is a specific electronic component, typically categorized as a High Voltage Ceramic Disc Capacitor. These parts are commonly used in power supplies, monitors, and industrial equipment where high-frequency noise suppression and voltage stability are required. --- ### 1. Technical Specifications Below are the general technical parameters for the 125LD47-R: | Parameter | Specification | | :--- | :--- | | **Capacitance** | 470 pF (0.47 nF) | | **Voltage Rating** | 125 VAC / 15 kV DC (Depending on series) | | **Dielectric Material** | Ceramic (Linear/N4700 or similar) | | **Tolerance** | ±10% or ±20% | | **Mounting Type** | Through-Hole (Radial Leads) | | **Operating Temperature** | -25°C to +85°C | --- ### 2. Part Number Breakdown The nomenclature for these capacitors often follows this logic: * **125**: Often refers to the series or the AC voltage rating (125V) in safety-rated applications. * **LD**: Refers to the physical size/lead configuration (Long Disc/Lead). * **47**: Represents the significant figures of capacitance (47). * **-R**: Typically signifies compliance with **RoHS** (Restriction of Hazardous Substances) standards. --- ### 3. Key Applications Because of its high-voltage tolerance and ceramic construction, the 125LD47-R is used in the following circuits: 1. **Snubber Circuits:** Used to suppress voltage spikes in switching power supplies. 2. **High Voltage Power Supplies:** Found in CRT displays, X-ray equipment, and laser power modules. 3. **EMI/RFI Filtering:** Acts as a filter to prevent electromagnetic interference from entering or leaving a device. 4. **Lightning Arrestors:** Used in protective circuits to shunt high-voltage transients to the ground. --- ### 4. Typical Physical Dimensions These components are usually encapsulated in a blue or brown epoxy resin. ```text _____ / \ | 471 | <-- (47 + 1 zero = 470pF) | 15KV | <-- Voltage Rating \_____/ | | | | <-- Radial Leads ``` ---