The **C519-3.5-R** is a specific model of a subminiature glass tube fuse manufactured by **Eaton (formerly Bussmann)**. It is part of the C519 series, which is widely used in consumer electronics and industrial equipment for overcurrent protection. --- ### ## Technical Specifications Below are the primary electrical and physical characteristics of the C519-3.5-R: | Parameter | Specification | | :--- | :--- | | **Current Rating** | 3.5 Amps | | **Voltage Rating (AC)** | 250 Volts | | **Fuse Type** | Glass Tube | | **Speed/Characteristic** | Time-Delay (Slo-Blo) | | **Interrupting Rating** | 100A at 250Vac / 10,000A at 125Vac | | **Dimensions** | 5mm x 15mm (2AG size equivalent) | | **Termination Style** | Cartridge (Ferrule) | | **RoHS Compliant** | Yes (Indicated by the "-R" suffix) | --- ### ## Component Breakdown ### 1. Time-Delay Mechanism The "Time-Delay" (or Slow-Blow) characteristic means this fuse is designed to withstand temporary surges in current, such as those caused by a motor starting or a capacitor charging. It will not blow instantly unless the overcurrent is significantly higher than the 3.5A rating or persists for a specific duration. ### 2. Physical Construction * **Body:** Transparent glass, allowing for easy visual inspection to see if the internal filament has melted. * **Caps:** Nickel-plated brass end caps for high conductivity and corrosion resistance. * **Size:** At 5mm x 15mm, it is smaller than the standard 5mm x 20mm fuses, making it ideal for compact PCB layouts. ### 3. Part Number Suffixes * **C519:** The series designation (5x15mm Time-delay). * **3.5:** The rated current (3.5 Amperes). * **-R:** Indicates RoHS compliance (lead-free and environmentally friendly materials). --- ### ## Typical Applications * **Power Supplies:** Protecting input stages from surges. * **LED Lighting:** Used in drivers where initial inrush current is high. * **Consumer Electronics:** Chargers, monitors, and small appliances. * **Industrial Controls:** Protecting low-voltage control circuits. ---