The **SVFH-2W7W-R** is a high-performance, high-voltage film resistor typically used in specialized industrial and medical applications. It is designed to handle high voltage gradients while maintaining stability. ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Component Type** | High Voltage Thick Film Resistor | | **Power Rating** | 2.0 Watts (at 70°C) | | **Resistance Range** | Typically 100KΩ to 10GΩ (Check specific suffix) | | **Max Operating Voltage** | Up to 7,500V (7.5kV) DC | | **Tolerance** | ±1%, ±5%, or ±10% | | **Temperature Coefficient** | ±100 ppm/°C or ±200 ppm/°C | | **Termination Style** | Radial Leaded | --- ### 2. Physical & Material Construction * **Substrate:** High-purity Alumina ($Al_2O_3$) ceramic, which provides excellent thermal conductivity and electrical insulation. * **Resistive Element:** Proprietary thick film ruthenium oxide paste, screened onto the substrate. * **Coating:** Encapsulated in a high-dielectric silicone or epoxy coating (usually red or blue) to prevent arcing and protect against moisture. * **Terminals:** Solder-plated copper leads designed for Through-Hole Technology (THT). --- ### 3. Functional Features The "SVFH" series is specifically engineered for environments where standard resistors would fail due to dielectric breakdown. 1. **Voltage Stability:** Low voltage coefficient of resistance (VCR), meaning the resistance value does not change significantly as the applied voltage increases. 2. **Surge Handling:** Capable of withstanding momentary overloads and high-voltage pulses without degradation. 3. **Non-Inductive Design:** Due to the thick film pattern, it has very low inductance, making it suitable for high-frequency switching or fast-discharge circuits. --- ### 4. Common Applications Because of its high voltage rating and power dissipation, the SVFH-2W7W-R is found in: * **X-Ray Equipment:** Voltage dividers for high-voltage power supplies. * **Mass Spectrometers:** Precision voltage sensing. * **Laser Systems:** Power supply regulation. * **Test & Measurement:** High-voltage probes and multimeters. --- ### 5. Part Number Breakdown (Generic) While manufacturers vary slightly, the code usually breaks down as follows: * **SVFH:** Series identifier (High Voltage/Thick Film). * **2W:** Power rating (2 Watts). * **7W:** Physical dimensions/Size code. * **R:** Packaging code (often signifies RoHS compliance or Tape & Reel/Bulk).