The **C519-2-R** is a high-quality, time-delay (slow-blow) glass tube fuse manufactured by **Eaton (formerly Bussmann)**. It is part of the C519 series, which is a standard 5mm x 15mm small-dimension fuse widely used in consumer electronics and industrial power supplies. --- ### ## Technical Specifications Below are the primary electrical and physical characteristics of the C519-2-R: | Feature | Specification | | :--- | :--- | | **Current Rating** | 2 Amperes (2A) | | **Voltage Rating (AC)** | 250 Volts | | **Fuse Type** | Time-Delay (Slow-Blow) | | **Material** | Glass Tube with Nickel-plated Brass Endcaps | | **Dimensions** | 5mm (Diameter) x 15mm (Length) | | **Interrupt Rating** | 100A at 250Vac / 10,000A at 125Vac | | **Resistance (Cold)** | Approximately 0.054 Ohms | | **RoHS Compliant** | Yes (denoted by the "-R" suffix) | --- ### ### Key Characteristics #### 1. Time-Delay Functionality As a **Slo-Blo** fuse, the C519-2-R is designed to withstand temporary surges or "inrush currents." Unlike "Fast-Acting" fuses that blow instantly upon hitting the current limit, this fuse allows a momentary spike (such as when a motor or power supply capacitor charges up) without breaking the circuit. #### 2. Physical Construction * **Glass Body:** Allows for easy visual inspection to see if the internal filament is broken. * **Ferrule Design:** The "C519" series is typically a cartridge style meant for fuse clips or holders, but can sometimes be found with axial leads (though the standard -R is a cartridge). #### 3. The "-R" Suffix In the Bussmann/Eaton 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. --- ### ### Common Applications The C519-2-R is found in various electronic devices where protection against overcurrent is necessary but where initial power-on surges are expected: * **Power Supplies:** Protecting the primary AC input side. * **Consumer Electronics:** Televisions, audio equipment, and chargers. * **Lighting Ballasts:** Used to protect internal circuitry from component failure. * **Small Appliances:** Protection for motors or heaters. --- ### ### Example Implementation (Circuit Context) If you were integrating this into a PCB design, you would typically use it in conjunction with a fuse holder or clips: ```yaml Component: Fuse Reference: F1 Part_Number: C519-2-R Footprint: Fuse_Holder_5x15mm Protection: Overcurrent / Short Circuit ```