Electronic Components & Devices

Board to Board Connectors

5678 Series

Floating type For High-speed Transmission

The 5678 Series feature a pitch of 0.8mm and a stacking height between 12.0 and 19.0mm. These connectors, also featuring high-speed transmission and a floating structure based on Kyocera’s proprietary product concept, are the most suitable stacking type connectors for connection with sub boards to expand functions. They enable high-speed serial data communication of 2.5Gbps compliant with PCI Express 1.0. The floating structure absorbs misalignments in mounting the connector on the printed circuit board and losses caused from installation of the connected printed circuit, by moving ±0.4mm in the X and Y directions respectively. Such structure allows multiple low-pin-count connectors to be mounted on the printed circuit board and does not require crowded wiring to high-pin-count connectors. Thus, there is more flexibility in the wiring layout and the connectors can be positioned in each circuit with the shortest path, enabling effective use of the mounting area. In addition, these connectors have achieved an optimum structure for preventing quality deterioration of data transmission signals.

0.8mm Pitch

Typical Applications

Printers / Copiers, Servers, Industrial Equipment, Medical Equipment etc.

Part No. List by Number of Positions:


Stacking Height 12.0, 14.0, 17.0, 19.0mm
No. of Positions 60 / 120
Connection Style Vertical-Vertical
With or Without
Metal Tabs
Mounting Method
Pitch 0.8mm
Rated Current DC 0.5A/Contact
Rated Voltage DC 50V/Contact
Withstanding Voltage AC 500Vrms/min.


  • With controlled impedance of molded parts and contacts, the 5678 Series allow high-speed serial data transmission of 2.5Gbps by differential pairs comprised of GSSG (up to 38 pairs are recommended for 120-pin connectors). These high-speed transmission connectors correspond to standards such as PCI Express 1.0, USB, IEEE1394, and SATA. Wiring of multiple serial signals inside the connectors is also possible.
  • Due to Kyocera’s proprietary floating structure, the mated connectors are movable by ±0.4mm in the X and Y directions. With the GSSG differential pair and the floating structure, the characteristic impedance is controlled to 100Ω±15%. Impedance variation is restrained within ±3Ω when connectors invoke the ±0.4mm floating feature.
  • Features a stacking height between 12.0 and 19.0mm from combinations of the plug and receptacle connectors.
  • Mating guides on the plug and receptacle connectors assure secure mating.
  • RoHS compliant and Halogen-free
  • Contact Material: Copper alloy
  • Insulator Material: Heat-resistant plastic
  • Operating Temperature Range: -40 to +85°C

Plating Specifications

Plating CodeContact AreaTail AreaMetal tabsRoHS Compliance
831+ Au Au Sn-Cu Yes

Go to Board to Board Connectors TOP

Inquiries about products and technical information

Please feel free to contact us. Our staff will reply to your inquiry.

Inquiries by E-mail