The **C518-100-R** is a specific type of electronic component used primarily for circuit protection. It belongs to the **C518 series** manufactured by **Eaton (Bussmann Division)**. ### 1. General Overview The C518-100-R is a **Fast-Acting Glass Tube Fuse**. It is designed to protect sensitive electronic components by interrupting the circuit immediately when a current overload or short circuit occurs. ### 2. Technical Specifications Below are the primary technical parameters for this component: | Parameter | Value | | :--- | :--- | | **Current Rating** | 100mA (0.1 Amp) | | **Voltage Rating (AC)** | 250V | | **Fuse Type** | Fast-Acting (Fast Blow) | | **Body Material** | Glass Tube | | **Form Factor / Size** | 5mm x 15mm (2AG Equivalent) | | **Termination Style** | Axial Leaded (Through-hole) | | **RoHS Compliant** | Yes (indicated by the "-R" suffix) | --- ### 3. Key Features * **Axial Leads:** Unlike standard cartridge fuses that fit into clips, this fuse has wire leads soldered to the end caps. This allows it to be soldered directly onto a Printed Circuit Board (PCB). * **Fast-Acting:** It is designed to open (blow) quickly. It does not tolerate sustained surges, making it ideal for protecting ICs and other delicate semiconductors. * **Compact Size:** At 5x15mm, it is smaller than the standard 5x20mm fuse, saving board space. * **Transparency:** The glass body allows for visual inspection to see if the fuse element has melted. ### 4. Common Applications Due to its low current rating (100mA) and fast response time, it is typically found in: 1. **Power Supplies:** Protecting the primary side of small power adapters. 2. **Instrumentation:** Guarding sensitive measurement equipment. 3. **Consumer Electronics:** Used in chargers, set-top boxes, and small appliances. 4. **Telecommunications:** Protecting line cards and networking hardware. --- ### 5. Part Number Breakdown Understanding the nomenclature helps in identifying similar parts: | Segment | Meaning | | :--- | :--- | | **C518** | Series Name (5x15mm Axial Glass Fuse) | | **100** | Current Rating (100mA) | | **-R** | RoHS Compliant (Lead-free) |