The **C520-500-R** is a high-performance, fast-acting subminiature axial leaded fuse manufactured by **Eaton (Bussmann Series)**. It is designed for primary and secondary circuit protection in compact electronic devices. --- ### ## Technical Specifications The following table outlines the primary electrical and mechanical characteristics of the C520-500-R: | Parameter | Specification | | :--- | :--- | | **Current Rating** | 500 mA (0.5A) | | **Voltage Rating (AC)** | 250 Volts | | **Fuse Type** | Fast-Acting (Fast Blow) | | **Interrupting Rating** | 35A @ 250VAC / 10,000A @ 125VAC | | **Body Material** | Glass Tube | | **Termination Style** | Axial Leaded (Through-hole) | | **Dimensions** | 5mm x 15mm | | **Resistance (Cold)** | 0.445 Ohms (Typical) | | **RoHS Compliant** | Yes (-R suffix indicates RoHS) | --- ### ## Key Electronic Features * **Fast-Acting Response:** The C520 series is engineered to open quickly when an overload occurs. This protects sensitive semiconductor components that cannot withstand overcurrent conditions for extended periods. * **Small Footprint:** At only 5mm x 15mm, it is significantly smaller than the standard 5mm x 20mm glass fuses, making it ideal for high-density Printed Circuit Boards (PCBs). * **Low Internal Resistance:** The 500mA variant is designed to minimize voltage drop across the fuse, ensuring the circuit receives the intended power without significant loss. * **Glass Construction:** The transparent glass body allows for easy visual inspection to determine if the fuse has blown. --- ### ## Typical Applications Due to its 500mA rating and fast-acting nature, the C520-500-R is commonly used in: 1. **Power Supplies:** Protecting the input stages of small AC/DC adapters. 2. **Consumer Electronics:** Chargers, LED lighting drivers, and small household appliances. 3. **Industrial Equipment:** Control boards and PLCs where space is at a premium. 4. **Test Equipment:** Protecting internal circuitry from user-induced short circuits. --- ### ## Equivalent/Related Parts If you are looking for alternatives or similar parts within the C520 family: * **C520-100-R:** 100mA version. * **C520-3-R:** 3A version. * **C515 Series:** This is the "Time-Delay" (Slow Blow) equivalent for circuits with high inrush currents.