The **5MT1-R** is a specific model of miniature glass tube fuse manufactured by Bel Fuse Inc. It is widely used in power supplies, monitors, and consumer electronics to protect circuits from overcurrent conditions. --- ### ## Technical Specifications Below are the primary electrical and physical characteristics of the 5MT1-R: | Characteristic | Specification | | :--- | :--- | | **Fuse Type** | Glass Tube (Miniature) | | **Current Rating** | 1 Ampere (1A) | | **Voltage Rating (AC)** | 250V AC | | **Response Characteristic** | Medium Time-Lag (Medium Blow) | | **Size / Dimension** | 5mm x 20mm | | **Termination Style** | Cartridge (Ferrule) | | **Breaking Capacity** | 35A @ 250V AC / 10,000A @ 125V AC | | **RoHS Compliant** | Yes (The "-R" suffix denotes Lead-Free/RoHS) | --- ### ### Key Electronic Components & Features 1. **The Fuse Element:** Inside the glass tube is a metal wire or filament designed to melt at a specific temperature. The "Medium Time-Lag" rating means it can handle brief surges (like a device starting up) without blowing, but it will disconnect if the overcurrent persists. 2. **Glass Body:** The transparent glass allows for easy visual inspection. If the fuse is "blown," you can often see a broken wire or dark scorch marks inside the tube. 3. **Nickel-Plated Brass Caps:** The two ends of the fuse are made of conductive metal caps. These provide the electrical connection to the fuse holder or clips and are resistant to corrosion. 4. **The "-R" Suffix:** In the Bel Fuse naming convention, the **R** stands for **RoHS Compliant**. This indicates that the part is manufactured without lead or other restricted hazardous materials. --- ### ### Application and Safety * **Protection:** It protects the "load" side of a circuit. If a component fails and shorts out, the 5MT1-R blows, preventing fire or further damage to the motherboard. * **Replacement Warning:** Always replace a 5MT1-R with a fuse of the same current (1A) and voltage (250V) rating. Replacing it with a "Fast-Acting" fuse may cause the fuse to blow prematurely during normal startup.