The **RJS1.5-R** is a specific type of electronic component used primarily for circuit protection. It is a **radial leaded, slow-blow (time-delay) fuse** manufactured by **Bel Fuse Inc.** Below is a detailed breakdown of its specifications and physical characteristics. --- ### 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Current Rating** | 1.5 Amperes | | **Voltage Rating (AC)** | 600V AC | | **Fuse Type** | Time-Delay (Slow Blow) | | **Body Material** | Glass Tube with Brass Caps | | **Lead Style** | Radial (Through-hole mounting) | | **Breaking Capacity** | 60A @ 600V AC | | **RoHS Compliant** | Yes (indicated by the "-R" suffix) | ### 2. Physical Design and Dimensions The RJS series is known for its unique long-body radial design. Unlike standard axial fuses, these are meant to stand vertically on a PCB to save horizontal space. * **Shape:** Cylindrical glass body. * **Mounting:** Vertical through-hole. * **Dimensions:** Approximately 4.6mm x 19mm (body size). * **Suffix "-R":** This indicates that the part is Lead-Free and compliant with RoHS (Restriction of Hazardous Substances) standards. ### 3. Functional Characteristics * **Time-Delay (T):** This fuse is designed to withstand temporary surges or "inrush" currents (like when a motor starts or a capacitor charges). It will not blow instantly unless the overcurrent persists. * **High Voltage Rating:** At 600V, this fuse is robust enough for industrial power supplies and ballasts where high-voltage protection is required. ### 4. Common Applications Due to its high voltage rating and slow-blow nature, it is typically found in: 1. **Electronic Ballasts:** Used in lighting fixtures. 2. **Power Supplies:** Specifically for input protection. 3. **Industrial Controllers:** Protecting sensitive circuitry from line-side transients. 4. **Telecommunications:** Network equipment requiring high-voltage durability. ---