The part number **20021321** typically refers to a **PCB-mount header** or connector, most commonly associated with **Amphenol Communications Solutions** (formerly FCI). It belongs to the Minitek™ 1.27mm pitch series. --- ### 1. Technical Specifications This specific component is designed for board-to-board or wire-to-board connections where space is at a premium. | Feature | Specification | | :--- | :--- | | **Part Series** | Minitek™ 1.27mm (0.050") | | **Connector Type** | Header, Male Pins | | **Mounting Type** | Surface Mount (SMT) or Through-Hole (Vertical) | | **Number of Rows** | 2 (Dual Row) | | **Pitch** | 1.27 mm (0.050 inches) | | **Contact Material** | Copper Alloy | | **Plating** | Gold or Selective Gold/Tin | | **Insulation Material** | Thermoplastic (UL 94 V-0) | --- ### 2. Physical Characteristics * **Shrouding:** These headers are typically "shrouded," meaning they have a plastic wall around the pins to prevent accidental shorting and to ensure the mating connector is inserted in the correct orientation (polarization). * **Compact Design:** The 1.27mm pitch is exactly half the size of standard 2.54mm (0.1") headers, making it ideal for high-density electronics like mobile devices, medical equipment, and industrial controllers. --- ### 3. Common Applications Due to its small footprint and reliability, the 20021321 series is found in: 1. **Industrial Controls:** PLC modules and sensor interfaces. 2. **Data Communications:** Servers and networking hardware where internal space is limited. 3. **Consumer Electronics:** Handheld devices and modular PC components. 4. **Medical Systems:** Portable diagnostic tools. --- ### 4. Ordering Nomenclature Example The digits following `20021321` often dictate specific variations: ```text 20021321-000XXLF | | | |__ Lead-Free (RoHS) | | |_____ Packaging (Tape & Reel vs Tube) | |_______ Number of Positions (e.g., 10, 20, 30 pins) |__________ Plating Code (Gold thickness) ```