The **RJS2.5-R** is a specific model of a **Radial Leaded Miniature Fuse** manufactured by **Bel Fuse Inc.** It belongs to the RJS series, which is characterized by its rectangular body and through-hole mounting design. --- ### 1. Technical Specifications The RJS2.5-R is designed for board-level overcurrent protection. Below are its primary electrical and physical characteristics: | Parameter | Specification | | :--- | :--- | | **Current Rating** | 2.5 Amperes (A) | | **Voltage Rating (AC)** | 600V AC | | **Voltage Rating (DC)** | 150V DC | | **Fuse Type** | Time-Lag (Slow Blow) / Slow Acting | | **Mounting Type** | Through-Hole (Radial Leads) | | **Body Material** | Thermoplastic / Glass Tube (model dependent) | | **Operating Temperature** | -55°C to +125°C | | **RoHS Compliant** | Yes (indicated by the "-R" suffix) | --- ### 2. Key Features * **Time-Lag Characteristic:** Unlike "Fast Acting" fuses, the RJS2.5-R can withstand temporary current surges (inrush current) without blowing, making it ideal for circuits with motors or capacitors. * **High Voltage Rating:** The 600VAC rating is significantly higher than standard 5x20mm glass fuses, allowing it to be used in high-power industrial power supplies. * **Suffix "-R":** This indicates that the part is fully compliant with RoHS (Restriction of Hazardous Substances) standards (lead-free). * **Compact Footprint:** Designed to save space on Printed Circuit Boards (PCBs) compared to traditional fuse blocks and clips. --- ### 3. Common Applications Due to its slow-blow nature and high voltage tolerance, it is frequently found in: * **Telecommunications:** Protection for line cards and networking hardware. * **Power Supplies:** Primary side protection for AC/DC adapters. * **Industrial Controllers:** Protecting sensitive circuitry from power fluctuations. * **Medical Equipment:** Reliable overcurrent protection in diagnostic devices. --- ### 4. Circuit Representation In a schematic diagram, the RJS2.5-R is represented by the standard fuse symbol with its specific value: ```text F1 -----[~~~~]----- 2.5A (RJS2.5) ```