
Delta SMA connectors are subminiature, precision, 50 Ωimpedance connectors with 1⁄4"-36 threaded coupling.
They are best suited for use with high-frequency semi-rigid cables in demanding applications up to 18 GHz, or
miniature flexible cables up to 12.4 GHz. Our extensive line of SMA receptacles includes configurations for virtually
any packaging requirement, and we can supply any adapter or accessory you may need to complete your system design.
Adapters between SMA and other series are shown starting on page 176. Many of our SMA connectors are available as
MIL-PRF-39012 QPL versions. These types are listed starting on page 195.
As with our other connector series, Delta’s customer-driven design results in SMA series connectors with practical and
unique features that make your design and assembly process easier. Some of these include:
•One-Step cable connectors for quick, accurate assembly to semi-rigid cable.
•PressMount receptacles (page 115) mount securely in a single round hole, saving space on your components and
reducing your housing fabrication costs.
•Panel receptacles with flange sizes to match the same hole pattern as standard BNC, TNC or N connectors, letting you
drill one hole pattern and mount BNC, N, SMA, TNC, or 7/16 series connectors as needed.
•Edge-mount P.C. board receptacles (page 114).
•Our new E-Line brass SMA connectors provide a lower-cost alternative for commercial applications (page 123).
Our SMA series product line is still growing, so please call if you don’t see what you need.
Cable Plugs for Semi-Rigid Cable ................................. 2
Cable Plugs for Flexible Cable ....................................... 3
Straight Cable Jacks for Semi-Rigid Cable ................. 4
Bulkhead Cable Jacks for Semi-Rigid Cable .............. 4
Panel Cable Jacks for Semi-Rigid Cable ...................... 4
Straight Cable Jacks for Flexible Cable....................... 5
Bulkhead Cable Jacks for Flexible Cable.................... 5
Straight Panel Jack Receptacles.................................... 6
Panel Jack Receptacles for Microstrip .........................10
Right Angle Panel Jack Receptacles............................ 11
Stripline Receptacles......................................................... 11
Bulkhead Jack Receptacles ............................................. 12
P.C. Board Receptacles (Through-Hole Mount)....... 12
P.C. Board Receptacles (Edge Mount)......................... 13
PressMount Receptacles ................................................. 14
Panel Plug Receptacles .................................................... 15
Dust Caps............................................................................... 19
In-Series Adapters.............................................................. 20
Electrical:
Nominal Impedance: 50 ohms.
Frequency Range: DC–18 GHz (with semi-rigid cable);
DC–12.4 GHz (with flexible cable).
Voltage Rating: 335–500 volts RMS (dependent on cable).
Dielectric Withstanding
Voltage : 500–1500 volts RMS (dependent on cable).
Insulation Resistance: 5,000 megohms.
Materials/Finishes:
Insulators: Teflon per ASTM D1710.
Male Contacts: Brass per ASTM B16, or
Beryllium Copper per ASTM B196.
Female Contacts: Beryllium Copper per ASTM B196.
Contact Plating : Gold per MIL-DTL-45204.
Gaskets: Silicone rubber per ZZ-R-765,Class II, Grade 50.
Other Metal Parts: Stainless steel per ASTM A582, plated gold per
MIL-DTL-45204 or passivated to meet corrosion requirements of MIL-
PRF-39012; or Brass per ASTM B16: plated gold per MIL-DTL-45204.
All other specifications are in accordance with the latest issues
of MIL-PRF-39012, or MIL-A-55339, or other applicable MIL
specifications, and interfaces are in accordance with MIL-STD-348.
*These specifications are typical and may not apply to all
connectors. Detailed specifications for individual connectors
are available on request.
SMA Connectors
General Description
1
Delta Electronics Mfg. Corp. deltarf.com 978-927-1060 sales@deltarf.com
SMA Configuration
SMA Specifications*
Reference Plane
Insulator projection .000 max.
.100 max.
Contact shoulder projection
.000 max; recession .010 max.
.135 max.
.250 min.
.1808 max.
.0355/.0370
.015/.045
.250-36 UNS-2B,
.130 min.
full thread
Plug Interface**
Insulator projection .000 max. Contact projection .000 max;
recession .010 max.
.049
.051
.015/.045
.1810
min.
.208
.216
.218 min.
.250-36 UNS-2A,
.170 min. full thread
.074/.078
Reference Plane
Jack Interface**
**Some proportions
altered to illustrate detail.