The **S02-18-R** is a specific part number belonging to the **S02 series** of SolderSleeve Shield Terminators, manufactured by **TE Connectivity / Raychem**. These components are engineered to provide an environmentally sealed, insulated, and encapsulated electrical connection for shield grounding. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Series** | S02 (NAS 1747 Equivalent) | | **Material** | Polyvinylidene fluoride (PVDF) Heat-shrinkable sleeve | | **Solder Alloy** | Sn63 Pb37 (Leaded solder) | | **Temperature Rating** | -55°C to +150°C | | **Flux Type** | ROL1 (Thermally activated) | | **Pre-installed Lead** | Yes (Typically a high-temperature wire lead) | --- ### 2. Functional Components The S02-18-R is a composite part consisting of four main elements: 1. **Heat-Shrinkable Sleeve:** Transparent blue radiation-crosslinked PVDF. It provides insulation and strain relief. 2. **Solder Preform:** A precise amount of solder (Sn63) with a flux core. When heated, it melts to create a permanent electrical bond between the shield and the ground lead. 3. **Thermoplastic Sealing Rings:** Located at both ends of the sleeve. These melt during installation to provide an environmental seal against moisture and contaminants. 4. **Pre-installed Ground Lead:** The "18" in the part number often refers to the gauge or specific configuration of the pre-attached wire used to divert the shield's signal to the ground. --- ### 3. Application Process To install an S02-18-R, a technician typically follows these steps: * **Preparation:** Strip the jacket of the cable to expose the braided shield. * **Positioning:** Slide the SolderSleeve over the exposed shield. * **Heating:** Use a calibrated heat gun with a reflector nozzle. * **Reflow:** The heat shrinks the tubing, melts the sealing rings, and flows the solder into the braid. * **Inspection:** Because the sleeve is transparent, the connection can be visually inspected for a proper "solder fillet." --- ### 4. Advantages * **Reliability:** Meets stringent aerospace standards (like AS83519). * **Space Saving:** Low profile compared to traditional mechanical clamps. * **Consistency:** The pre-measured solder ensures every joint is uniform, reducing human error. ---