The **A-DS50LL-TL-B-R** is a specific electronic connector, typically categorized as a High-Density D-Subminiature component. These parts are widely used in computing, industrial control systems, and telecommunications for multi-signal data transmission. Below is a detailed breakdown of its electronic and mechanical specifications. ### 1. Part Number Deciphering While prefixes can vary slightly by manufacturer (such as Assmann WSW or similar vendors), the nomenclature generally follows this logic: | Code Segment | Meaning | Specification | | :--- | :--- | :--- | | **A** | Series Prefix | Standard D-Sub Series | | **DS** | Connector Type | D-Subminiature | | **50** | Pin Count | 50 Positions | | **LL** | Contact Type | Low Profile / Standard Socket (Female) | | **TL** | Mounting/Plating | Through-hole / Tin-Lead or Gold Flash | | **B** | Shell Size | Size 3 or B-Size Shell | | **R** | Compliance | RoHS Compliant (usually) | --- ### 2. Technical Specifications This component is designed to handle multiple low-voltage signals in a space-efficient footprint. #### Electrical Characteristics * **Current Rating:** Typically 1A to 3A per contact. * **Voltage Rating:** 250V AC/DC. * **Contact Resistance:** $\le$ 15-30 $m\Omega$. * **Insulation Resistance:** $\ge$ 1000 $M\Omega$ at 500V DC. * **Dielectric Strength:** 500V AC for 1 minute. #### Mechanical & Material Properties * **Housing:** Thermoplastic (UL 94V-0 rated), usually PBT or Nylon. * **Contacts:** Copper Alloy (Brass or Phosphor Bronze). * **Plating:** Gold flash on the contact area; Tin on the solder tails. * **Orientation:** Right-angle or Straight Through-hole (PCB Mount). * **Mating Cycles:** 50 to 100 cycles minimum. --- ### 3. Application Use Cases Due to the high pin density (50 pins in a shell size normally used for fewer pins in standard D-subs), this part is ideal for: 1. **Industrial Automation:** Connecting PLC units to sensors/actuators. 2. **Legacy Computing:** SCSI interfaces or parallel data transfer. 3. **Telecommunications:** Patch panels and distribution frames. 4. **Medical Equipment:** Multi-channel signal monitoring. --- ### 4. Comparison: High-Density vs. Standard | Feature | Standard D-Sub | High-Density (A-DS50) | | :--- | :--- | :--- | | **Rows** | 2 Rows | 3 Rows | | **Pin Density** | Lower | Higher (3 rows of pins in same shell size) | | **Application** | RS-232 / VGA | High-speed data / SCSI |