## Understanding the STD02W-R Electronic Part The **STD02W-R** is a specific type of cable and wire marker manufactured by **TE Connectivity (Raychem)**. It belongs to the STD series of snap-on pre-printed markers used extensively in industrial, electrical, and telecommunications wiring for identification purposes. ### 1. Technical Specifications | Feature | Description | | :--- | :--- | | **Manufacturer** | TE Connectivity / Raychem | | **Series** | STD Snap-On Markers | | **Marker Legend** | "R" (Uppercase Letter) | | **Color** | White marker with Black ink | | **Material** | Polyoxymethylene (POM / Acetal) | | **Temperature Range** | -40°C to +106°C | | **Mounting Type** | Snap-On (Applied after termination) | | **Wire Diameter Range** | Typically 2.3mm to 3.0mm | --- ### 2. Key Features and Construction * **Side-Entry Design:** The marker features a "C" shape profile. Unlike heat-shrink tubing, these can be applied **after** the wire has been terminated (soldered or crimped), making them ideal for maintenance and retrofitting. * **Expansion Grip:** The material is designed with high elasticity. When snapped onto a cable, it grips the insulation firmly, preventing the marker from sliding or rotating easily. * **Interlocking System:** The edges of the markers are often "wedged" or shaped to interlock with adjacent markers. This ensures that multi-character strings (e.g., "R101") stay aligned and legible. * **Durability:** The use of POM provides excellent resistance to chemicals, fuels, and abrasion, which is critical for long-term industrial use. --- ### 3. Application Use Cases The STD02W-R is commonly found in: 1. **Control Panels:** Identifying signal wires in complex PLC environments. 2. **Automotive/Aerospace:** Marking harnesses for easy troubleshooting. 3. **Data Centers:** Labeling patch cables and power leads. --- ### 4. Part Number Breakdown (Example) | Segment | Meaning | | :--- | :--- | | **STD** | Series Name (Snap-On Terminal Designation) | | **02** | Size code (determines the wire diameter compatibility) | | **W** | Color code (White background) | | **R** | Legend (The character printed on the marker) |