The **A-DF09LL-TL-B-R** is a specific electronic component, typically identifying as a **D-Subminiature (D-Sub) connector**. Based on standard nomenclature from manufacturers like Assmann WSW or similar electronic hardware providers, this part is used for data transmission and peripheral connections. --- ### 1. Part Number Decomposition To understand the part, we can break down the typical alphanumeric code: | Segment | Meaning | Description | | :--- | :--- | :--- | | **A-DF** | Series / Type | D-Sub Female (Socket) | | **09** | Pin Count | 9-Position (standard DE-9 size) | | **LL** | Mounting Type | Low Profile / Solder Cup or PCB Dip | | **TL** | Plating/Style | Typically refers to Tin/Lead or specific contact plating | | **B** | Color/Shell | Usually indicates a Black insulator or specific shell finish | | **R** | Compliance | RoHS Compliant | --- ### 2. Technical Specifications While exact specs can vary slightly by manufacturer, the standard parameters for this type of connector are: * **Connector Type:** D-Sub Socket (Female). * **Number of Positions:** 9 Pins (arranged in 2 rows: 5 on top, 4 on bottom). * **Mounting Orientation:** Right Angle or Straight (Check datasheet for specific lead formation). * **Current Rating:** Typically 3A per contact. * **Voltage Rating:** 250V AC/DC. * **Contact Material:** Phosphor Bronze or Brass with Gold/Tin plating. * **Housing Material:** Thermoplastic (UL 94V-0 rated). --- ### 3. Common Applications This part is a staple in legacy and industrial electronics due to its durability and secure connection: 1. **RS-232 Serial Ports:** Used for communication between PCs and industrial machinery. 2. **Controller Interfaces:** Common in PLC (Programmable Logic Controller) modules. 3. **Networking:** Older Token Ring or specific console management ports. 4. **Video:** Occasionally used in specialized low-resolution analog signal paths. --- ### 4. Footprint and Mechanical Design The "LL" designation often implies a specific mechanical footprint for PCB mounting. ```markdown Side Profile Visualization: [Back Shell] | | ___|__|___ <-- PCB Surface | | | | <-- Solder Pins ``` ---