The **C515-500-R** is a high-performance, time-delay (slow-blow) glass tube fuse manufactured by **Eaton (formerly Bussmann)**. It is part of the C515 series, designed specifically for applications requiring a smaller physical footprint than standard 3AG fuses while maintaining robust electrical protection. --- ## 1. Technical Specifications | Feature | Specification | | :--- | :--- | | **Current Rating** | 500 mA (0.5 Amps) | | **Voltage Rating (AC)** | 250 VAC | | **Fuse Type** | Time-Delay / Slow-Blow (T) | | **Form Factor** | 5mm x 15mm (Small Cylindrical) | | **Material** | Glass Tube with Nickel-plated Brass Endcaps | | **Interrupt Rating** | 35A @ 250VAC / 10,000A @ 125VAC | | **RoHS Compliant** | Yes (indicated by the "-R" suffix) | --- ## 2. Key Characteristics ### A. Time-Delay Functionality Unlike "Fast-Acting" fuses, the C515-500-R is designed to withstand temporary **inrush currents** or power surges. This prevents "nuisance blowing"—where the fuse pops during normal startup cycles of motors or power supplies—while still protecting against sustained overloads or short circuits. ### B. Physical Dimensions The **5mm x 15mm** size is a specific intermediate standard. It is shorter than the standard 5x20mm fuse commonly found in European electronics and significantly smaller than the 6.3x32mm (1/4" x 1-1/4") fuses used in North American appliances. ### C. Termination This specific part number typically refers to the **ferrule (cartridge)** version, which is intended to be placed into a fuse clip or fuse holder. However, the C515 series also offers axial lead versions (C515S) for direct soldering onto PCBs. --- ## 3. Common Applications Due to its 500mA rating and slow-blow nature, this component is frequently used in: * **Power Supplies:** Protecting the primary side of small AC/DC adapters. * **Consumer Electronics:** Televisions, chargers, and audio equipment. * **Industrial Controls:** Protecting sensitive low-current control circuits. * **LED Lighting:** Drivers that experience a high initial current spike when turned on. --- ## 4. Part Number Breakdown * **C515**: The Series name (5x15mm glass tube). * **500**: The current rating (500 milliamperes). * **-R**: RoHS compliant (lead-free and environmentally safe).