The **H4P3N-R** is an electronic component belonging to the **H4P Series** of high-precision metal film resistors. These are typically manufactured by companies like **TE Connectivity** (Holsworthy). Below is a detailed breakdown of the technical specifications, physical characteristics, and typical applications. --- ## 1. Technical Specifications The H4P3N-R follows a specific nomenclature. Based on the standard datasheet for the H4P series, the technical parameters are as follows: | Parameter | Specification | | :--- | :--- | | **Resistor Type** | Metal Film (High Precision) | | **Power Rating** | 0.75 Watts (at 70°C) | | **Resistance Value** | Defined by the numeric code (e.g., 3.0 Ohms or similar) | | **Tolerance** | Usually ±0.1% to ±1.0% (Series standard) | | **Temp. Coefficient (TCR)** | ±15ppm/°C to ±50ppm/°C | | **Max Working Voltage** | 350V | | **Mounting Type** | Through-Hole (Axial) | --- ## 2. Key Features The "H4P" series is engineered for stability and reliability in demanding circuits. * **Metal Film Technology:** Provides superior stability under load and resistance to environmental moisture compared to carbon film resistors. * **Precision Performance:** Designed for low noise and low voltage coefficient. * **Encapsulation:** Coated with a multi-layer epoxy for protection against mechanical damage and humidity. * **High Power-to-Size Ratio:** While physically small (roughly 10mm in length), it can handle up to 0.75W, which is higher than standard 0.25W resistors. --- ## 3. Physical Dimensions (Typical) | Part Section | Dimension (mm) | | :--- | :--- | | **Body Length (L)** | 10.0 ± 1.0 | | **Body Diameter (D)** | 3.7 ± 0.5 | | **Lead Diameter (d)** | 0.6 ± 0.05 | | **Lead Length (l)** | 30.0 ± 3.0 | --- ## 4. Common Applications Due to its high precision and low temperature drift, the H4P3N-R is commonly found in: 1. **Measurement Equipment:** Calibration tools and multimeters. 2. **Audio Circuitry:** High-fidelity amplifiers where low noise is critical. 3. **Industrial Controls:** Signal processing units that require consistent resistance regardless of temperature changes. 4. **Medical Electronics:** Diagnostic equipment requiring long-term reliability. ---