The **MX2J10RE-R58** is a high-power, thick film chip resistor manufactured by **Ohmite** (part of the MX series). These components are designed specifically for high-voltage applications where stability and reliability under stress are critical. Below is a detailed breakdown of its electronic characteristics and technical specifications. --- ## 1. Technical Specifications The part number follows a specific nomenclature that defines its electronic properties: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Resistance Value** | 10 $\Omega$ | The nominal resistance. | | **Tolerance** | $\pm 5\%$ (J) | The allowable deviation from the nominal resistance. | | **Voltage Rating** | Up to 5,000V | High dielectric strength for high-voltage circuits. | | **Power Rating** | 2 Watts | The maximum power the resistor can dissipate at 70°C. | | **Technology** | Thick Film | Conductive paste fired onto a ceramic substrate. | | **Termination** | Solderable | Designed for surface mount (SMD) or bolt-on depending on specific package footprint. | --- ## 2. Key Electronic Features The MX series is engineered for harsh electrical environments. Its electronic behavior is characterized by: ### A. Voltage Coefficient of Resistance (VCR) Unlike standard resistors, the MX2J10RE-R58 is designed with a very low VCR. This means the resistance value remains stable even as the applied voltage increases toward the 5kV limit, preventing circuit drift in precision high-voltage dividers. ### B. Thermal Management * **Operating Temperature:** Typically ranges from **-55°C to +155°C**. * **TCR (Temperature Coefficient):** Usually rated at $\pm 100$ ppm/°C, ensuring that resistance does not change significantly as the component heats up during operation. ### C. Construction * **Substrate:** 96% Alumina ($Al_2O_3$) for excellent thermal conductivity and electrical insulation. * **Coating:** Encapsulated in a glass or silicone-based overcoat to protect against moisture and high-voltage arcing (corona discharge). --- ## 3. Common Applications Due to its high voltage and power rating, this part is commonly found in the following electronic systems: 1. **Power Supplies:** Used as a bleeder resistor to discharge high-voltage capacitors safely. 2. **Medical Equipment:** Found in X-ray machines and MRI scanners. 3. **Industrial Controls:** Used in motor drives and high-voltage pulse-forming networks. 4. **Measurement:** Acts as a current sense or voltage divider component in multi-meters and oscilloscopes. --- ## 4. Part Number Breakdown (Ohmite MX Series) | Segment | Code | Meaning | | :--- | :--- | :--- | | **Series** | MX | High Voltage / High Power Thick Film | | **Size/Power** | 2 | 2 Watt Rating | | **Tolerance** | J | 5% Tolerance | | **Resistance** | 10RE | 10.0 Ohms | | **Packaging** | R58 | Tape and Reel / Specific Lead-free packaging code |