The **H4P3N-R** is a specific part number typically associated with the **TE Connectivity (Holsworthy) H4 series** of high-precision metal film resistors. These components are designed for high-reliability applications where stability and tight tolerances are critical. --- ### 1. Technical Specifications The part number "H4P3N-R" follows a specific coding structure. Here is a breakdown of its technical characteristics: | Characteristic | Specification | | :--- | :--- | | **Resistor Type** | Metal Film (High Precision) | | **Series** | H4 (Power rating and physical size) | | **Power Rating** | 0.5 Watts (at 70°C) | | **Maximum Voltage** | 350V | | **Mounting Type** | Through-hole (Axial) | | **Temperature Coefficient** | Generally ±15ppm/°C to ±100ppm/°C (varies by subtype) | --- ### 2. Physical Construction The H4 series is built using specialized materials to ensure long-term stability under varying environmental conditions: * **Resistive Element:** A thin film of metal alloy is vacuum-deposited onto a high-thermal-conductivity ceramic core. * **Termination:** Electrolytic copper lead wires are welded to the end caps for secure electrical contact. * **Coating:** The body is protected by an epoxy resin coating that provides insulation and resistance against solvents and moisture. --- ### 3. Key Applications Due to their precision and low noise characteristics, these resistors are frequently found in: 1. **Industrial Instrumentation:** Calibration equipment and measurement sensors. 2. **Medical Electronics:** Diagnostic equipment requiring stable signal processing. 3. **Audio Processing:** High-end audio circuits where low thermal noise is required. 4. **Telecommunications:** Network equipment and line cards. --- ### 4. Decoding the Part Number (General TE Logic) While specific suffix codes can vary by manufacturer batches, the standard breakdown for the H4 series is as follows: * **H4:** Series identifier (0.5W size). * **P:** Tolerance/Packaging code (often indicates loose or specific tape requirements). * **3N:** Value/Multiplier (Specific resistance value depending on the alphanumeric encoding used). * **-R:** Often signifies **RoHS Compliance** (Lead-free). ---