The **MNV-1-R** is a high-precision, subminiature, fast-acting fuse developed by Eaton (formerly Bussmann). It is specifically designed for surface-mount applications where space is limited and reliable circuit protection is critical. --- ### ## Technical Specifications The following table outlines the primary electrical and physical characteristics of the MNV-1-R: | Feature | Specification | | :--- | :--- | | **Current Rating** | 1 Ampere | | **Voltage Rating (AC/DC)** | 125V AC / 125V DC | | **Interrupting Rating** | 50A @ 125V AC/DC | | **Fuse Speed** | Fast-Acting (F) | | **Mounting Type** | Surface Mount (SMD) | | **Case Size/Package** | EIA 1206 (3216 Metric) | | **Resistance (Typical)** | 0.098 Ohms | | **Operating Temperature** | -55°C to +125°C | --- ### ### Key Electronic Components & Materials The MNV-1-R is constructed using materials chosen for thermal stability and precise melting points: 1. **Fusible Element:** A thin film or wire filament made of a high-conductivity alloy (typically silver or copper base) designed to melt instantly when current exceeds 1A for a specific duration. 2. **Ceramic Substrate:** The body is made of high-grade ceramic to withstand the heat of the soldering process and provide insulation after the fuse has blown. 3. **Terminations:** The end caps are typically silver-plated or tin-plated over a nickel barrier to ensure excellent solderability and prevent "leaching" during the assembly process. --- ### ### Applications Because of its small **1206 footprint** and fast response time, the MNV-1-R is commonly found in: * **LCD Monitors:** Protection for backlight inverters. * **Portable Electronics:** Smartphones, tablets, and handheld gaming consoles. * **Power Supplies:** Secondary side protection in DC-DC converters. * **Battery Packs:** Protecting lithium-ion cells from short-circuit conditions. --- ### ### Protection Characteristics As a **Fast-Acting** fuse, the MNV-1-R is designed to open very quickly (usually within milliseconds) when an overcurrent occurs. This prevents sensitive semiconductor components (like ICs and Transistors) downstream from being damaged by thermal runaway or excessive current.