HD-EFI Connectors

HD-EFI Connectors

The HD-EFI product series is a micro-miniature interface designed to allow large board tolerance stack ups, blind mating, and multiple RF lines. It is available in common PCB jack and cable plug configurations, with an assortment of bullet adapters to accommodate many board to board spacing options.

The HD-EFI interface is a proprietary design, allowing for a very stable RF signal over the full axial range of the connector system. It has generous “float” to compensate for the axial and radial misalignment tolerance common in small package sized applications.

The interface is available as a 50 ohm connector system with a performance of DC to 6 GHz, making them ideal for high-performance applications with a small package size.

Features and Benefits
  • Performance to 6 GHz for 50 ohm systems
  • Proprietary configuration designed to maximize radial and axial float in board-to-board applications
  • Closed entry interface and crash-proof mating design
  • Ideal for blindmating and multiple RF lines between boards
  • Wireless Base Station Equipment
  • Multiple Board to Board Connections
  • Complex PCB Stack-ups
  • Military/Aerospace
  • Broadband
  • Routers
  • Telecommunications

HD-EFI Connectors Specifications


Impedance 50 Ohm
Frequency Range DC - 6 GHz
Voltage Rating 335 Volts RMS Continuous
Dielectric Withstanding Voltage 1000 Volts RMS Max
VSWR  (Return Loss)  
     Axial Misalignment ± 0.7 mm  
     DC - 2 GHz 1.14 (-24 dB) Max
     2 - 4 GHz 1.22 (-20 dB) Max
     4 - 6 GHz 1.38 (-16 dB) Max
     Axial Misalignment ± 0.3 mm  
     DC - 2 GHz 1.08 (-28 dB) Max
     2 - 4 GHz 1.12 (-25 dB) Max
     4 - 6 GHz 1.2 (-21 dB) Max
Insulation Resistance  5000 MΩ Min
Center Contact Resistance 5 mΩ Max
Outer Contact Resistance 5 mΩ Max
Insertion Loss  
     DC - 3 GHz -0.14 dB Max
     3 - 6 GHz -0.27 dB Max
3rd Order Intermodulation  930 & 955 MHz (2X43 dBm), -163dBc Max (Low PIM Designs)
Power Handling 40 W Max @ 2.6 GHz @ 95ºC
  120 W Max @ 2.5 GHz @ 95ºC


Temperature Range −45°C to +125°C
Thermal Shock MIL-STD-202, Method 107, Condition B
Corrosion MIL-STD-202, Method 101, Condition B - 5% Salt Spray
Vibration MIL-STD-202, Method 204, Condition B
Mechanical Shock MIL-STD-202, Method 213, Condition A - No Discontinuity Permitted
Humidity/Temperature Cycling MIL-STD-202, Method 106, Condition A
Temperature Life 250 Hours at 125° C, No Damage to Parts


Mating Cycles 50 Min (Limited Detent), 200 Min (Smooth Bore)
Coupling Mechanism Push-On
Interface Specification Amphenol RF Proprietary
Engagement Force 12 N Max (Smooth Bore), 25 N Max (Limited Detent)
Disengagement Force 2 - 6 N (Smooth Bore), 9 N Min (Limited Detent)
Mechanical Misalignment  
     Axial ±0.7 mm
     Radial ±0.7 mm
     Max Float Angle 5⁰ Surface Mount Parts, 3.5⁰ Through-hole Mount Parts
     Min Board to Board Distance 11.46 mm
Note: These characteristics are typical and may not apply to all connectors.
Connector configurations may affect performance.