3421-6620

The 3421-6620 from 3M delivers military-grade performance in Rectangular Connectors - Free Hanging, Panel Mount, engineered for defense and aerospace applications where reliability is non-negotiable. This ruggedized interconnect solution meets MIL-DTL-38999 Series III specifications while offering enhanced performance for avionics, ground vehicles, and naval systems.As a Receptacle solution, it incorporates hermetic sealing for extreme environments. The glass-filled thermoplastic housing maintains dimensional stability from -65 C to +200 C.The Female Socket design features hyperbolic contact geometry for consistent performance under vibration. The beryllium copper alloy springs maintain contact force through severe shock events.Configurable up to 20 contacts, the connector supports mixed signal types in a single shell. The numbered cavity system ensures proper pin assignment in field repairs.The 0.100" (2.54mm) arrangement provides optimal balance between current capacity and weight savings. This spacing allows for proper potting compound flow in environmentally sealed units.The 2 row circular design facilitates 360 shielding effectiveness. The staggered contact arrangement minimizes crosstalk in multi-channel RF systems.0.100" (2.54mm) separation between contact rows prevents voltage breakdown at altitude. This spacing is critical for high-voltage avionics systems.The Free Hanging (In-Line) version includes corrosion-resistant mounting hardware. The stainless steel fasteners meet NAS specifications for aerospace applications.Featuring IDC technology, the system maintains signal integrity up to 40GHz. The precision-machined contacts preserve cable impedance through the termination zone.Compatible with Ribbon Cable military-spec cables, the contacts exceed MIL-W-22759 performance requirements. The quad-crimp termination ensures reliability in high-flex applications.Supporting 26-28 AWG military wire, the contacts maintain performance through 2000 mating cycles. The controlled crimp height ensures consistent compression across all strands.The Feed Through, Polarizing Key, Strain Relief include EMP shielding meeting MIL-STD-188-125 requirements. The conductive gasket system provides 360 shielding continuity in harsh environments.The Gold plating exceeds MIL-G-45204 gold purity standards. The cobalt-hardened gold deposit resists wear from frequent mating cycles.With 30.0µin (0.76µm) plating, the contacts exceed MIL-STD-1344 test requirements. The nickel barrier layer prevents gold migration in humid environments.The Gray housing incorporates radar-absorbent materials for reduced RCS signatures. The chemical-resistant finish withstands decontamination procedures.