Smiths Connectors is now Smiths Interconnect


MarketID in (1,3,4,6,7,8,11)
  • MDCX VSWR of 1.25:1 (typ) up to 10 GHz (max mated pair)
  • MDHC VSWR of 1.5:1 (typ) up to 40GHz (max mated pair)
  • Maximum overall diameter of 0.125" fitted into low-profile Micro-D housing
  • Constant 50 Ohm airline impedance

Multipin coax connectors (MDCX) have low VSWR of 1.25:1 up to 10 GHz (max mated pair). Each spring loaded contact has a maximum diameter of 0.125" fitted into low profile metalized housing. 

Spring loaded High Frequency Micro-D Coax Connectors (MDHC) offer low VSWR up to 40 GHz (typ). These connectors have a constant 50 ohm airline impedance interface and are 30% smaller than our SCX coaxial connectors. Each coax contact has a maximum overall diameter of Ø.133" fitted into a low-profile metalized or plastic housing. MDHC coaxial contacts are a drop in alternative to Smiths Connectors MDCX RF contacts with increased frequency range from 10 GHz to 40 GHz. 

MDCX and MDHC coaxial contacts are compact in size allowing multiple high density connections in a Micro-D style shell for applications where space and weight savings are important. No cumbersome spring mounts are required. These connectors are also available with locking post mechanisms or blindmate hardware attachment.

  • Insert arrangements available in 2, 4, 6, 8 and 10 way
  • mixed signal and power contacts available in hybrid arrangements
  • RoHS compliant

Mechanical & Environmental Specifications

Durability 1,000 cycles min.
500 cycles min. Signal Contacts
Corrosion MIL-STD-202 Method 101, Test Condition B
Temperature Rating -65˚C to + 165˚C
Shock MIL-STD-202 Method 213, Test Condition B
Vibration MIL-STD-202 Method 204, Test Condition B
Thermal Shock MIL-STD-202 Method 107, Test Condition B
Mating/Unmating Force 1 lb. min.
Float Mount Constraints   0.010" full radial & 0.010 axial misalignment max

Materials and Finishes

Center & Outer Spring Contacts Brass per ASTM-B16, alloy UNS C36000
or BeCu per ASTM-B196, alloy UNS C17200, C17300
Gold Plate per MIL-DTL-45204, Type II, Class 1
Insulator PTFE per ASTM D-1710
Connector Plug/Receptacle Shell Aluminum per ASTM-B211/221, 6061-T6
Electroless Nickel Plate per SAE-AMS-C-26074
Compliance RoHS Compliant


Contact Current Rating 5 Amps max. for 0.030 Signal Pins
2.0 Amps max. for 0.015 Signal Contacts
DWV 500 VDC @sea level with 70% relative humidity
Insulation Resistance 5000 mega-ohms min. @ 200 VDC
Characteristic Impedance 50 Ohm constant airline impedance
RF HI Potential Withstanding Voltage 125 VRMS @ 5 MHz
Corona Level @ 70,000 Center contact to intermediate contact: 125 VAC
Permeability 2.0 max.
Frequency Range MDHC: DC-40 GHz
VSWR 1.5:1   (typ) Mated Pair  up to 40 GHz (MDHC)
1.3:1   (typ) Mated Pair up to 30 GHz (MDHC)
1.25:1 (typ) Mated Pair up to 10 GHz (MDCX)
All specifications are subject to change without notice