The part number **519-1-R** typically refers to a specific series of **Miniature Fuse Clips** or **Electronic Hardware Components**, most notably manufactured by companies like **Keystone Electronics**. These are essential for securing fuses onto a Printed Circuit Board (PCB). --- ### 1. Technical Specifications The 519-1-R is designed to hold 5mm diameter fuses (such as the standard 5x20mm fuse). Below are the general technical parameters: | Parameter | Specification | | :--- | :--- | | **Component Type** | Fuse Clip | | **Fuse Diameter** | 5mm | | **Material** | Brass | | **Finish/Plating** | Tin Plating (indicated by the "R" suffix for RoHS compliance) | | **Mounting Type** | Through-Hole (PCB Mount) | | **Current Rating** | Typically up to 6.3 Amps - 10 Amps (varies by manufacturer) | | **Compliance** | RoHS Compliant | --- ### 2. Physical Design and Features The design of the 519-1-R is optimized for reliability and ease of maintenance: * **Ear Style:** It usually features "ears" or tabs that provide a mechanical stop to ensure the fuse stays centered and does not slide out under vibration. * **Low Profile:** Designed to take up minimal vertical space on the PCB. * **Solderability:** The tin plating ensures excellent solderability and protects the base brass material from oxidation. * **Snap-in Design:** The legs are often designed to snap into the PCB holes, holding the clip in place during the soldering process. --- ### 3. Common Applications These clips are found in power supplies, consumer electronics, and industrial equipment where a fuse needs to be easily replaceable without desoldering. * **Protection Circuits:** Acting as the interface between the incoming power and the protective fuse. * **Maintenance:** Allowing technicians to swap blown 5x20mm fuses quickly. --- ### 4. Mounting Layout (Typical) To use two 519-1-R clips for a standard 5x20mm fuse, the PCB footprint must be precisely aligned: ```text [ Clip 1 ] <------- 20mm Fuse -------> [ Clip 2 ] | | (PCB) (PCB) ``` > **Note:** Always ensure the trace width on your PCB is sufficient to handle the current rating of the fuse being used with these clips.