### Overview of RLR-04-P-R The **RLR-04-P-R** is a specific model of a **Resistor, Fixed, Film**. It belongs to a class of high-reliability components typically used in military, aerospace, and critical industrial applications. --- ### 1. Part Number Breakdown To understand the electronic characteristics, we can decode the part number according to the MIL-PRF-39017 specification: | Segment | Meaning | Description | | :--- | :--- | :--- | | **RLR** | Style | Established Reliability, Metal Film Resistor | | **04** | Size / Power | Small form factor (equivalent to 1/8 Watt or 0.125W) | | **P** | Lead Material | Solderable/Weldable leads | | **R** | Failure Rate | 0.01% per 1,000 hours (M-Level or higher reliability) | --- ### 2. Key Electrical Specifications Based on standard manufacturer datasheets for the RLR04 series (such as Vishay Dale): * **Resistance Range:** Typically available from $10\Omega$ to $301k\Omega$. * **Tolerance:** Commonly $\pm 1\%$ or $\pm 2\%$. * **Power Rating:** $0.125 \text{ Watts } (1/8 \text{ W})$ at $70^\circ\text{C}$. * **Voltage Rating:** Maximum working voltage is usually around $200 \text{V}$. * **Temperature Coefficient:** $\pm 100 \text{ ppm/}^\circ\text{C}$. * **Operating Temperature:** $-65^\circ\text{C}$ to $+150^\circ\text{C}$. --- ### 3. Physical Construction The "Electronic Parts" composition involves high-grade materials to ensure stability under harsh conditions: 1. **Resistive Element:** A metal film vacuum-deposited onto a high-quality ceramic rod. 2. **Encapsulation:** Molded epoxy or flame-retardant coating for environmental protection. 3. **Terminations:** Solder-plated copper leads. 4. **Reliability Features:** These parts undergo "Burn-in" testing to weed out infant mortality failures, meeting MIL-PRF-39017 standards. --- ### 4. Comparison with Commercial Resistors | Feature | RLR-04-P-R (Military) | Standard Commercial (CR Series) | | :--- | :--- | :--- | | **Reliability** | Established Failure Rate | Not Specified | | **Environment** | High shock/vibration resistance | Standard protection | | **Testing** | 100% Group A inspection | Batch sampling | | **Application** | Avionics, Medical, Defense | Consumer electronics | ---