Based on the component designation **WRPPB-JM5K5R-R**, this part belongs to a specific series of high-precision, wirewound, surface-mount resistors, typically manufactured by companies like **Vishay** or specialized precision resistor brands. Below is a breakdown of the electronic specifications and features associated with this part number. --- ### 1. Part Number Deciphering The alphanumeric string follows a standard industrial coding system for resistors: | Segment | Meaning | Specification | | :--- | :--- | :--- | | **WRPPB** | Series Code | Wirewound, Precision, Power, Surface Mount | | **JM** | Package Size | Often correlates to a 2010 or 2512 SMD footprint | | **5K5** | Resistance Value | 5.5 kΩ (5,500 Ohms) | | **R** | Tolerance | ±0.05% or ±0.1% (High Precision) | | **-R** | Packaging/RoHS | Tape & Reel / RoHS Compliant | --- ### 2. Technical Specifications These parts are designed for stability and high-reliability environments. * **Technology:** Wirewound (Resistance wire wrapped around a ceramic core). This provides superior pulse handling compared to thin-film resistors. * **Resistance:** 5.5 kΩ. * **Power Rating:** Typically ranges from **1W to 3W** depending on the specific package size and ambient temperature. * **Temperature Coefficient (TCR):** Usually very low (±10 ppm/°C to ±50 ppm/°C), ensuring the resistance doesn't drift significantly with heat. * **Tolerance:** Extreme precision, often used for voltage sensing or calibration. --- ### 3. Key Applications Because this is a **Precision Wirewound Resistor**, it is used in circuits where accuracy is more critical than cost: 1. **Current Sensing:** High stability under load makes it ideal for measuring current in power supplies. 2. **Medical Equipment:** Used in monitoring devices that require long-term stability. 3. **Industrial Controls:** Precision analog-to-digital (ADC) conversion circuits. 4. **Test & Measurement:** Found in high-end multimeters and calibration standards. --- ### 4. Physical Characteristics Unlike standard thick-film resistors (which are flat), these parts often have a molded "pedestal" or "tombstone" shape to accommodate the internal wire coil. * **Mounting Type:** Surface Mount (SMD/SMT). * **Construction:** Flameproof silicone or epoxy coating over a ceramic core. ---