The **M5M5-2-R** is a specific part number typically associated with **Bussmann (Eaton)** series subminiature fuses. Specifically, it belongs to the **M5 Series**, which are fast-acting, radial-leaded fuses designed for space-constrained printed circuit board (PCB) applications. --- ### 1. Technical Specifications The part number breaks down specific electrical characteristics essential for circuit protection. | Parameter | Specification | | :--- | :--- | | **Series** | M5 (Subminiature Micro Fuse) | | **Current Rating** | 2 Amperes (indicated by the "2") | | **Voltage Rating** | 125V AC / 125V DC | | **Interrupting Rating** | 50A at 125V AC/DC | | **Response Time** | Fast-Acting (F) | | **Termination Style** | Radial Leaded (Through-hole) | | **RoHS Compliant** | Yes (indicated by the "R" suffix) | --- ### 2. Key Features * **Form Factor:** It features a small, rectangular or cylindrical plastic body (often called "micro" or "subminiature") which takes up significantly less space than traditional 5x20mm glass fuses. * **Direct Soldering:** The radial leads allow the fuse to be soldered directly onto the PCB, eliminating the need for a separate fuse holder (though holders exist for this format). * **Fast-Acting:** It is designed to open the circuit quickly when an overcurrent occurs, protecting sensitive semiconductor components. * **Environmentally Friendly:** The "-R" suffix denotes compliance with RoHS standards (Lead-free). --- ### 3. Common Applications Due to its small size and reliable protection, the M5M5-2-R is found in: 1. **Consumer Electronics:** Power supplies for chargers, laptops, and set-top boxes. 2. **Industrial Equipment:** Control boards and PLCs where space is at a premium. 3. **Telecommunications:** Network routers, switches, and modems. 4. **LED Lighting:** Drivers and ballasts. --- ### 4. Comparison with Standard Fuses If you are replacing a fuse, note these physical differences: | Feature | Standard (5x20mm) | M5M5-2-R | | :--- | :--- | :--- | | **Mounting** | Clip/Socket | Through-hole Solder | | **Space Use** | High | Very Low | | **Replaceability** | User-replaceable | Requires Desoldering | ---