Based on the description and common industry nomenclature, **PCB-1/2-R** typically refers to a **High-Current PCB Mount Fuse Clip** manufactured by **Eaton (formerly Bussmann)**. These components are designed to secure cartridge fuses directly onto a printed circuit board (PCB). --- ## 1. Component Overview The PCB-1/2-R is a metal clip designed for **5mm diameter fuses** (typically 5x20mm). The "-R" suffix indicates that the part is **RoHS compliant**. ### Technical Specifications | Feature | Specification | | :--- | :--- | | **Compatible Fuse Size** | 5mm Diameter (e.g., 5x20mm) | | **Current Rating** | Up to 15 Amps | | **Voltage Rating** | Typically 250V AC/DC | | **Material** | Tin-plated Bronze | | **Mounting Type** | Through-hole (Solder) | | **Lead Orientation** | Radial / Vertical | --- ## 2. Key Features * **Small Footprint:** Designed to minimize space usage on high-density PCBs. * **Low Resistance:** The tin-plated bronze construction ensures high conductivity and low thermal buildup. * **End-Stop Design:** Often features a physical stop to ensure the fuse is centered correctly within the clip. * **High Retention Force:** Ensures the fuse remains in place during mechanical vibrations or thermal expansion. --- ## 3. PCB Layout Considerations When designing a PCB for these parts, the following dimensions are critical: ### Footprint Details * **Drill Hole Diameter:** Usually around 1.3mm to 1.5mm. * **Spacing:** Since these are individual clips, two clips are required per fuse. The spacing between the clips depends on the length of the fuse (e.g., for a 20mm fuse, the centers are approximately 22.5mm apart). ```markdown [CLIP 1] <---- 20mm Fuse ----> [CLIP 2] | | (Hole) (Hole) ``` --- ## 4. Usage Instructions 1. **Placement:** Insert two clips into the PCB at the appropriate distance for the chosen fuse length. 2. **Soldering:** Use standard wave soldering or hand soldering. Because the clips act as heat sinks, slightly higher temperatures or longer dwell times may be needed compared to small resistors. 3. **Fuse Insertion:** Once soldered, snap the cartridge fuse into the clips. ---