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VHDM® H-Series Connector System

Achieve data rates up to 6.25 Gbps with Molex's VHDM® H-Series Backplane Connector System

Molex's H-Series Connectors The Very High Density Metric 'H' Series (VHDM® H-Series) connector system from Molex is designed for applications that require very high interconnect density and high-speed signal integrity. VHDM H-Series enables an installed base to perform at 6.25 Gbps, enabling system upgrades without costly architecture redesigns. With an identical mating interface and envelope, the VHDM H-Series is fully backwards compatible with existing VHDM slots. Designers can use VHDM H-Series to extend the life of existing platforms, reduce development costs, and speed higher performance systems to market.

The signal portion of the VHDM H-Series connector system consists of modules in increments of 10 columns or 25 columns in either 6 rows or 8 rows. The daughter card connector consists of a metal stiffener that combines signal wafers, power modules, and guidance modules to make one continuous connector that can be ordered with one custom part number. The maximum length of a single stiffener is 300mm (~12"). The power contacts can handle 10.0A of current per blade, efficiently delivering up to 120.0A per 25.00mm (.984") of board edge with multiple mating levels for hot plug applications. Metal guide pins and key slots provide excellent guidance for large PCBs and eliminate the possibility of plugging a daughter card into the wrong slot.


  • Enable system upgrade scalability without costly architecture
  • Mates with existing VHDM systems to enable backwards compatibility with existing VHDM slots
  • Ability to combine VHDM® L-Series (1 Gbps), VHDM® (3.125 Gbps), VHDM® H-Series (6.25 Gbps) and VHDM-HSD™ (5Gbps) wafers on the same metal stiffener
  • Extends the life of existing platforms, reduces development costs, and
    provides a high system speed to the market
  • Maximizes design flexibility via custom configuration of signal, power, and guide modules
  • Improves PCB routing and back drilling while reducing impedance discontinuities
  • Internal ground shields
  • Data rates up to 6.25 Gbps
  • Small compliant-pin 0.45mm (.018") PCB hole size
  • Modular construction
  • Reduces application costs while improving design flexibility
  • Control impedance and minimize cross talk


  • Hubs
  • Switches
  • Telecommunications hardware

  • Servers
  • Storage

  • Network equipment
  • Storage systems

  • Test equipment

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Digi-Key P/N Manufacturer P/N Description Datasheet
WM4466-ND 0767619001 VHDM-H BP HDR 6X10 GUIDE LEFT Datasheet
WM4467-ND 0767618501 VHDM-H BP HDR 6X25 GUIDE LEFT Datasheet
WM4468-ND 0767629001 VHDM-H BP HDR 6X10 GUIDE RIGHT Datasheet
WM4469-ND 0767628501 VHDM-H BP HDR 6X25 GUIDE RIGHT Datasheet
WM4470-ND 0767639001 VHDM-H BP HDR 6X10 OPEN Datasheet
WM4471-ND 0767638501 VHDM-H BP HDR 6X25 OPEN Datasheet
WM4472-ND 0761349001 VHDM-H BP HDR 8X10 OPEN Datasheet
WM4473-ND 0761348501 VHDM-H BP HDR 8X25 OPEN Datasheet
WM4474-ND 0761359001 VHDM-H BP HDR 8X10 GUIDE LEFT Datasheet
WM4475-ND 0761358501 VHDM-H BP HDR 8X25 GUIDE LEFT Datasheet
WM4476-ND 0761369001 VHDM-H BP HDR 8X10 GUIDE RIGHT Datasheet
WM4477-ND 0761368501 VHDM-H BP HDR 8X25 GUIDE RIGHT Datasheet