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hm 2.0 – Hardmetric Connectors

High Contact Density
The hm 2.0 series of hardmetric connectors was developed in accordance with the international IEC 61076-4-101 standard. These shielded connectors have a pitch of 2 mm and are suitable for applications that require high contact density and reliability. Standardization ensures that the connectors are compatible with products from different manufacturers.

  • wide selection of types
  • modular connectors with a pitch of 2 mm
  • 5 or 8 signal rows
  • 12 different pin lengths
  • customized assembly layout as an option
  • available with or without shielding
  • supports a data transfer rate of up to 3.125 Gbps
  • robust design
  • accessories such as shrouds and coding keys

More information on hm 2.0

The Standard IEC 61076-4-101

The hardmetric connector system ept hm 2.0 was developed and manufactured according to the international standard IEC 61076-4-101. Thus the user can rely on a worldwide standard for the connection of printed circuit boards using connectors with a large number of contacts. The printed circuit boards can be exchanged between systems without difficulty. Important parameters such as the fixing, shielding and coding of the printed circuit boards are compatible regardless of the individual application.

ept hm 2.0 connectors are designed with a 2 mm metric grid. They can be easily connected in series to form a continuous 2 mm grid. This grid pattern is advantageous when creating a printed circuit board since no space is lost in the individual connector modules.

The modules A, D, L and M are equipped with a multi-function block. This in turn can be equipped with the coding keys. The molded guides ensure the correct alignment of the male and female connectors to each other and they offer anti-twist protection before contacting.
The coding keys can be inserted or withdrawn using a simple insertion or withdrawal tool.

ept offers three different lengths for ­the front and four different lengths for the rear side. The different contact lengths are necessary because certain signal or ground contacts need to be the first to be connected/disconnected when adding/removing a module. The 11.25 mm long contacts are mainly required for the shielding rows z and f.

The ends of the insulator material are chamfered to simplify the connection of additional modules and avoid twisting the connectors. The chamfers ensure the exact positioning on the printed circuit boards and stabilize the modules.

The connectors must be coded in a modern BUS system to avoid mixing up the printed circuit boards. The possibility of coding has already been defined in the IEC 61076-4-101.
“Coding keys” can be manually snapped onto the multi-function block of the connector types A, D, L and M. The different inserts are color-coded and can thus be kept apart.


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  hm2.0 for High-Speed Applications

High-speed applications can be realized with hm2.0 connectors from ept. It was possible to attain data transfer rates of up to 3,125 Gbps under the framework conditions described below.

  • two hm2.0 connector pairs from ept
  • two standard FR4 cards at a thickness of 1.6 mm and strip conductor length of 115 mm
  • one standard FR4 backplane at a thickness of 4.4 mm and strip conductor length of 400 mm
  • special attention is paid to connection interruptions, the stub effect, the skin effect, and dielectric losses in the application design

We would be happy to provide you with more details and the corresponding technical literature on high-speed applications using hm2.0 connectors. Get in touch with us.


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ept GmbH

+ 49 (0) 8861 / 2501 0
+ 49 (0) 8861 / 5507
Bergwerkstr. 50
86971 Peiting, GERMANY


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