The **JARP2-CM-R/Q** is a specific series of high-precision, fixed metal film chip resistors commonly used in industrial and automotive electronics. These components are designed for surface-mount technology (SMT) and prioritize stability and low noise. --- ### 1. Key Technical Specifications Based on the standard nomenclature for this component class, here are the primary electronic characteristics: | Parameter | Typical Value / Range | Description | | :--- | :--- | :--- | | **Component Type** | Fixed Chip Resistor | Metal film technology | | **Tolerance** | ±0.1% to ±1% | Indicated by 'R' or 'Q' suffix variants | | **Temperature Coefficient** | ±25 ppm/°C to ±100 ppm/°C | Stability across temperature shifts | | **Power Rating** | 0.1W - 0.25W | Depending on physical package size | | **Operating Temp** | -55°C to +155°C | Standard industrial/automotive range | ### 2. Suffix Breakdown (R/Q) In electronic part numbering, the suffixes usually denote specific performance tolerances: * **-R:** Generally signifies a **Resistance Tolerance of ±0.5%** or is sometimes used to indicate **Tape & Reel** packaging. * **-Q:** Often signifies a **Resistance Tolerance of ±0.02% to ±0.1%** (Ultra-precision) or compliance with specific quality standards like AEC-Q200. ### 3. Internal Construction The "CM" designation often refers to **Metal Film** or **Carbon/Metal hybrid** construction: 1. **Substrate:** High-purity Alumina ($Al_2O_3$) ceramic base. 2. **Resistive Layer:** A thin film of metal alloy (like Nickel-Chromium) sputtered onto the substrate. 3. **Protective Coating:** An epoxy or glass-based overcoat to prevent oxidation and moisture ingress. 4. **Terminations:** Lead-free (Sn) solderable ends with a Nickel barrier layer to prevent "leaching" during soldering. ### 4. Typical Applications These parts are selected when standard thick-film resistors are too "noisy" or drift too much. * **Precision Instrumentation:** For signal conditioning and gain setting. * **Automotive ECUs:** High reliability in engine control and safety systems. * **Medical Equipment:** Low-noise requirements for monitoring devices. * **Communication Base Stations:** Stability in high-frequency environments. --- ### 5. Identification Code Example If you are looking at the physical component, the marking usually follows a 3 or 4-digit code: ```text Example: 1002 100 = Significant digits 2 = Multiplier (10^2) Result = 10,000 Ohms (10kΩ) ```