## S505H-2-R Component Overview The **S505H-2-R** is a high-performance ceramic tube fuse manufactured by **Eaton (Bussmann Series)**. It is specifically designed to handle high-breaking capacities and is often used in power supplies and industrial equipment. --- ### 1. Key Technical Specifications The table below summarizes the primary electrical and physical characteristics: | Property | Value | | :--- | :--- | | **Current Rating** | 2 Amperes (2A) | | **Voltage Rating (AC)** | 600 VAC | | **Voltage Rating (DC)** | 400 VDC / 500 VDC (varies by certification) | | **Fuse Type** | Time-Delay (Slow-Blow) | | **Breaking Capacity** | 1500A at 600VAC | | **Body Material** | Ceramic Tube | | **End Cap Material** | Nickel-plated brass | | **Dimensions** | 5mm x 20mm | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying the specific features of the part: * **S505H**: Indicates the series. The "H" typically denotes **High Breaking Capacity**. * **2**: Represents the rated current in Amperes (**2 Amps**). * **-R**: Signifies **RoHS Compliance** (Lead-free and environmentally friendly). --- ### 3. Core Features and Applications #### Features * **High Interrupting Rating:** Unlike standard glass fuses, the ceramic body allows it to safely interrupt much higher fault currents without shattering. * **Time-Delay Characteristic:** It can withstand temporary surges (like motor startups or capacitor charging) without blowing, but will trip if a sustained overcurrent occurs. * **Compact Form Factor:** The 5x20mm size is a global standard, making it easy to source and replace. #### Common Applications 1. **Power Supplies (SMPS):** Used on the primary side to protect against internal component failure. 2. **LED Lighting Drivers:** Provides protection against line surges. 3. **Industrial Controllers:** Safeguards sensitive PLCs and circuitry. 4. **Consumer Electronics:** High-end appliances requiring robust circuit protection. --- ### 4. Safety and Standards The S505H-2-R is designed to meet rigorous international safety standards, including: * **UL 248-14** (Supplemental Fuses) * **IEC 60127-2** (Cartridge Fuses) * **CSA** and **VDE** certifications.