Backplane Receptacle for 2mm HM Systems
The TE Connectivity 2392921-1 is a 2mm Hard Metric (H.M.) receptacle assembly with A/B-19 keying, designed for use in backplane and midplane interconnect systems. The 'E' suffix in the description indicates a specific contact arrangement or plating variant within the A/B-19 coding group. The 2mm pitch and Hard Metric form factor follow the IEC 61076-4-101 standard for high-density, high-speed differential-pair backplane connectors used in telecom, datacom, and industrial computing equipment.
Mating and Keying
The A/B-19 keying code defines the mechanical polarization of the connector, preventing incorrect mating with headers of a different keying code within the same 2mm HM family.