The **KSF-DA-R** belongs to a series of specialized high-voltage resistors, typically manufactured by companies like **KOA Speer** or similar electronic component specialists. These parts are primarily designed for power supply circuits, focusing on stability and high resistance values. Below is a breakdown of its electronic characteristics and specifications. --- ### 1. General Overview The KSF (usually referring to the **SIP - Single Inline Package**) DA series consists of high-voltage, thick-film resistors. They are often used as **voltage dividers** or high-impedance loads in precision circuits. ### 2. Technical Specifications | Feature | Specification | | :--- | :--- | | **Type** | High Voltage Thick Film Resistor | | **Package Style** | SIP (Single Inline Package) - Radial Lead | | **Coating** | Silicone or Epoxy resin (Flame retardant) | | **Resistance Range** | Typically $10M\Omega$ to $1G\Omega$ | | **Voltage Rating** | High (Often ranging from 5kV to 30kV depending on size) | | **Tolerance** | $\pm 1\%, \pm 5\%,$ or $\pm 10\%$ | ### 3. Key Electronic Functions * **Voltage Division:** Because of the "DA" (Divider) designation in many of these series, they are used to scale down high voltages to measurable levels for microcontrollers or analog-to-digital converters (ADCs). * **High Stability:** Designed with low Temperature Coefficient of Resistance (TCR), meaning the resistance value doesn't change drastically when the component heats up. * **Anti-Surge:** The thick film construction allows the part to handle sudden spikes in voltage without catastrophic failure. ### 4. Typical Applications 1. **CRT Displays:** Used in older monitor technologies for focus and anode voltage control. 2. **Medical Equipment:** X-ray power supplies and high-voltage diagnostic tools. 3. **Industrial Power Supplies:** Switching power supplies (SMPS) requiring high-voltage feedback loops. 4. **Copy Machines:** Handling the electrostatic discharge and charging units. --- ### Part Number Breakdown (Example) While specific to the manufacturer, the code usually breaks down as follows: * **KSF:** Series Name (High Voltage SIP). * **DA:** Specific configuration (often indicating a Voltage Divider network). * **R:** Indicates Radial leads or RoHS compliance (Lead-free).