The **2JS1-R** is a specific electronic component primarily identified as a **Micro Fuse** (Subminiature Fuse) from the **2JS series**, typically manufactured by companies like **Bel Fuse Inc.** --- ### ## Technical Overview The 2JS1-R is a glass-bodied, slow-blow (time-delay) fuse designed for space-constrained applications on Printed Circuit Boards (PCBs). The "R" suffix generally denotes **RoHS compliance** (Restriction of Hazardous Substances). ### ### Key Specifications | Parameter | Specification | | :--- | :--- | | **Current Rating** | 1 Ampere (1A) | | **Voltage Rating** | 350V AC / 140V DC | | **Fuse Type** | Slow-Blow / Time-Lag | | **Body Material** | Glass | | **Termination Style** | Axial Leaded (Through-hole) | | **Dimensions** | 4.7mm x 15mm (approx.) | | **Compliance** | RoHS 6 Compliant | --- ### ## Functional Characteristics * **Time-Delay (Slow-Blow):** Unlike fast-acting fuses, the 2JS1-R can withstand temporary surges or "inrush currents." This makes it ideal for circuits with motors or capacitors that draw a momentary spike of power when turned on. * **Axial Leads:** The metal wires extend from the ends of the fuse, allowing it to be soldered directly into PCB holes or mounted in specific fuse clips. * **High Voltage Rating:** With a 350VAC rating, it is suitable for primary-side protection in power supplies and industrial equipment. ### ## Common Applications The 2JS1-R is frequently used in the following electronic sectors: 1. **Power Supplies:** Protecting the input stage of AC/DC adapters. 2. **Consumer Electronics:** Used in chargers, monitors, and LED lighting drivers. 3. **Industrial Equipment:** Protecting control circuits and small motors. 4. **Telecommunications:** Used in line cards and network interfaces. --- ### ## Safety and Standards The component is typically tested and certified under various international safety standards to ensure it breaks the circuit safely under fault conditions: * **UL/CSA:** Recognized for safety in North America. * **PSE:** Compliance for the Japanese market. * **CE:** Compliance for European safety standards.