Amphenol 1221 Series — amphenol Interconnect and Electromechanical Component

Amphenol 1221 Series from amphenol offers 6 variants covering board-to-board, wire-to-board, and cable assembly interconnect configurations. This series serves PCB assembly, wire harness manufacturing, and electronic system integration across industrial controls, consumer electronics, automotive, and telecommunications equipment.

Application Scope

• PCB Assembly: Board-to-board stacking, mezzanine connections, right-angle interconnects, and programming/debug headers in embedded systems, industrial controllers, single-board computers, and consumer electronics.
• Wire Harness Manufacturing: Crimp-and-poke or insulation displacement (IDC) wire-to-board connections in cable harnesses for home appliances, automotive interior electronics, HVAC equipment, and industrial machinery.
• Field Installation and Service: Modular, field-repairable connector systems used in building automation, security and access control, commercial LED lighting, and telecommunications infrastructure where minimizing service downtime is critical.

Key Selection Parameters

• Contact Pitch: Center-to-center spacing from 2.54mm (0.100 inch, standard density) to 2.00mm, 1.27mm, 1.00mm, and 0.50mm (ultra-high density). Finer pitch enables smaller PCB footprint but demands more precise assembly.
• Number of Positions and Rows: Single row or dual row, typically from 2 to 100+ positions per connector.
• Termination Style: Through-hole solder for mechanical strength, surface mount (SMT) for automated reflow assembly, press-fit for solderless PCB connection, or discrete crimp contacts for wire harness assembly.
• Contact Plating: Gold flash (0.76µm, cost-effective for single-mate applications), 15µ inch gold (industrial, 100-250 mating cycles), or 30µ inch gold (military/aerospace, 500+ mating cycles). Tin plating for lowest cost.
• Housing Material and Compliance: UL 94V-0 rated thermoplastic for standard applications; LCP (liquid crystal polymer) for high-temperature Pb-free reflow soldering. RoHS and REACH compliant. Halogen-free options available.

Mating Compatibility Considerations

When ordering, verify that the PCB header, receptacle housing, and crimp terminal contacts are from the same connector family. While connectors at the same pitch from different manufacturers may mechanically mate, the contact normal force, plating compatibility, and rated mating cycles can differ significantly from the original manufacturer specifications.

Availability

Standard configurations (2-36 position, gold flash or tin plating, single and dual row) are commodity items with broad distributor stock and same-day shipment availability. Custom pin counts, heavy gold plating, or non-standard post lengths may carry 4-8 week lead times.