Amphenol FCI BergStak® 0.635mm Connectors

Amphenol FCI BergStak® 0.635mm Connectors feature a low 3mm stack height and 80 and 140 positions, making them ideal for applications requiring high pin counts and a low-profile connection. These compact, board-to-board connectors offer a micro-pitch of 0.635mm and support signal speeds of up to 8Gb/s with an open pin field for design flexibility. Additional features include polarization to prevent mismating, side walls that protect the contacts during mating, and UL 94V-0 housing made from high-temperature thermoplastic LCP. The connectors offer a current rating of 0.5A per contact (all contacts powered), 1000MΩ minimum insulation resistance, and a voltage rating of 100VAC/DC. Amphenol FCI BergStak 0.635mm Connectors provide a high-performance, space-saving solution for data servers, automation machines, medical devices, and more.


  • Micro-pitch of 0.635mm
  • Low-profile design to support 3mm stack height
  • High pin counts of 80 and 140
  • High-performance, space-saving solution
  • Polarization feature to prevent mismating
  • Side walls to protect the contacts during mating
  • High-speed performance of 8Gb/s with open-pin-field offers design flexibility
  • UL 94V-0 housing made from high-temperature thermoplastic LCP


  • Medical devices
  • Industrial instrumentation
    • Automation machines
  • Data servers and storage
  • Automotive
    • Advanced driver assistance systems (ADAS)


  • 0.5A current rating per contact (all contacts powered)
  • 1000MΩ minimum insulation resistance
  • 100VAC/DC voltage rating
  • -55°C to +85°C operating temperature range

Connector Details

Amphenol FCI BergStak® 0.635mm Connectors
Published: 2023-01-19 | Updated: 2023-01-27