The **S505-10-R** is a specific model of a cartridge fuse manufactured by **Eaton (Bussmann Series)**. It is a high-performance electronic component designed to protect circuits from overcurrent and short-circuit conditions. --- ## 1. Technical Specifications The following table summarizes the key electrical and physical characteristics of the S505-10-R: | Feature | Specification | | :--- | :--- | | **Product Series** | S505 (Bussmann Series) | | **Current Rating** | 10 Amperes | | **Voltage Rating (AC)** | 250 VAC | | **Fuse Type** | Ceramic Tube, Time-Delay (Slow-Blow) | | **Breaking Capacity** | 1500A at 250VAC | | **Physical Dimensions** | 5mm x 20mm | | **Termination Style** | Ferrule (Cartridge) | | **RoHS Compliant** | Yes (indicated by the "-R" suffix) | --- ## 2. Key Component Features ### A. Time-Delay (Slow-Blow) Characteristic Unlike "fast-acting" fuses, the S505-10-R is designed to withstand temporary surges or "inrush currents." This is crucial for devices like motors or power supplies that draw a large amount of current momentarily when turned on but operate at a lower current thereafter. ### B. Ceramic Construction The body is made of ceramic rather than glass. Ceramic fuses offer: * **Higher Breaking Capacity:** They can safely interrupt much higher fault currents without shattering. * **Thermal Stability:** They handle high-temperature environments better than glass equivalents. ### C. The "-R" Suffix In the Eaton/Bussmann naming convention, the **-R** indicates that the part is fully compliant with **RoHS** (Restriction of Hazardous Substances) standards, meaning it is lead-free and environmentally friendly. --- ## 3. Typical Applications Because of its high breaking capacity and 10A rating, this part is commonly found in: * **Power Supplies:** Protecting the primary (AC input) side. * **Industrial Control Panels:** Protecting small motors or actuators. * **Consumer Electronics:** Large appliances or high-end audio equipment. * **LED Drivers:** Where high inrush currents are expected during startup. --- ## 4. Safety and Equivalents When replacing this part, it is vital to match the **1500A breaking capacity**. A standard glass fuse (which usually has a much lower breaking capacity) may physically fit but could explode if a major short circuit occurs.