The **C520-100-R** is a high-performance, fast-acting subminiature axial leaded fuse manufactured by **Eaton (formerly Bussmann)**. It is specifically designed for primary circuit protection in electronic devices where space is limited and high interrupting ratings are required. --- ### ## Technical Specifications Below are the primary electrical and physical characteristics of the C520-100-R: | Parameter | Specification | | :--- | :--- | | **Current Rating** | 100 mA (0.1A) | | **Voltage Rating (AC)** | 250 V | | **Fuse Type** | Fast-Acting (F) | | **Body Material** | Glass | | **Mounting Type** | Through-hole (Axial Leaded) | | **Interrupting Rating** | 35A @ 250Vac / 10,000A @ 125Vac | | **Resistance (Cold)** | 8.40 Ohms (Typical) | | **Dimensions** | 5mm x 14.48mm (0.2" x 0.57") | | **RoHS Compliant** | Yes (indicated by the "-R" suffix) | --- ### ### Key Features 1. **Fast-Acting Response:** Designed to open quickly under overload or short-circuit conditions, protecting sensitive components like integrated circuits (ICs) and semiconductors. 2. **Axial Leaded Design:** The wire leads are attached to the end caps, allowing the fuse to be soldered directly onto a Printed Circuit Board (PCB) without the need for a fuse holder. 3. **Glass Body Construction:** The transparent glass tube allows for easy visual inspection to determine if the fuse has blown. 4. **High Voltage Rating:** Despite its small size, it is rated for up to 250V AC, making it suitable for mains-connected power supplies. --- ### ### Applications The C520 series is commonly found in the following electronic sectors: * **Power Supplies:** Protecting the input stage of AC/DC converters. * **Consumer Electronics:** Used in chargers, televisions, and small appliances. * **Industrial Equipment:** Protecting control circuits and low-current instrumentation. * **LED Lighting:** Safety protection for driver circuits. --- ### ### Understanding the Part Number `C520` - `100` - `R` * **C520:** The series designation (5 x 14.48mm glass body). * **100:** The current rating in milliamps (100mA). * **R:** Indicates RoHS compliance (Lead-free).