Weltech Electronics

RF Microwave Coaxial SMA Connector

RF Microwave Coaxial SMA Connector
Business Type Manufacturer, Exporter, Supplier
Type SMA Series
Material Brass
Certification CE Certified
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Preferred Buyer From

Location Worldwide

Product Details

Connecting Radio Frequency, Electrical Devices
Connection Type
Female, Male
Easy To Connect, Electrical Porcelain, Four Times Stronger
Current Type
Puncture Voltage
0-50Kw, 100-250Kw, 250-500Kw

RF Microwave Coaxial SMA Connector are high performance subminiature connectors for microwave frequencies. The threaded coupling insures uniform contact of the outer conductors, which enables the SMA to minimize reflections and attenuation at higher frequencies while providing a high degree of mechanical strength and durability.

Typical applications for SMA connectors include microwave active and passive components, instrumentation, avionics, and other high-end radio electronics.

Note :Reverse Polarity Connectors are available on special order.

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Interface Dimensions

Interface Dimensions


Letter Millimeters (Inches)
Minimum Maximum
A 0.00(.000) 0.38(.015)
B 0.90(.0355) 0.94(.037)
C - 4.59(.1808)
D 6.35(.250) -
E 0.00(.000) 0.18(.007)
F 0.00(.000) 0.25(.010)
G - 2.54(.100)
H - 3.43(.135)




Letter Millimeters (Inches)
Minimum Maximum
A 4.60(.1810) 4.67(.1837)
B 5.28(.208) 5.49(.216)
C 0.00(.000) 0.18(.007)
D 0.00(.000) 0.25(.010)
E 2.92(.115) -
F 1.88(.074) 1.98(.078)
G 0.38(.015) 1.149.045)
H 4.32(.170) -
I 5.54(.218) -
J 1.24(.049) 1.30(.051)




Impedance 50 ohm
Frequency Range 0 to 18.0 GHz - for RG-402 & RG-405 semi-rigid cable-0 to 18.0 GHz - for flexible cable→max operation frequency of cable per MIL-C-17 (12.4 GHz maz)
VSWR RG178U→ 1.2+0.025 f max (Straight)
1.2+0.03 f max (Right Angle)
RG316U→1.15+0.02 f max (Straight)
1.15+0.03 f max (Right Angle)
RG142U→ 1.15+0.01f max (Straight)
1.15+0.02 f max (Right Angle)
RG402→1.05+0.01 f GHz max (Straight)
1.1+0.01 f GHz max (Right Angle)
RG405→ 1.07+0.01 f GHz max (Straight)
1.1+0.01 f GHz max (Right Angle)
 Working Voltage RG-402(.141"OD.)→500 volts rms max
RG-405(.085:OD.)→335 volts rms max
RG-58,141,142,223→500 volts rms max
RG-174,188,316→335 volts rms max
RG-178,196→250 volts rms max
Dielectric Withstanding Voltage RG-402(.141"OD.)→1,000 volts rms max
RG-405(.085:OD.)→750 volts rms max
RG-58,141,142,223→1,000 volts rms max
RG-174,188,316→750 volts rms max
RG-178,196→500 volts rms max
Contact Resistance center contact=3.0 Milliohms max outer contact=2.0 Milliohms max
Insertion Loss 0.06 dB max - GHz @ 6 GHz
Insulation Resistance 5,000 Megohms min
Mechanical & Environmental
Mating Snap-on coupling
Durability 500 matings
Coupling Nut Retention 60 lbs Min
Recommend Nut Mating Torque 7 to 10 inch-pounds
Cable Retention RG-58,141,142,223→40 lbs minRG-174,188,316 →20 lbs min
Temperature Range -65-C to 165-C
Vibration MIL-STD-202 Method 204 Test Cond. D.
Salt Spray MIL-STD-202 Method 101 Test Cond. B.
Thermal shock MIL-STD-202 Method 107 Test Cond. B




Type Material Plating
Connector Body Brass Nickel or Gold
Center Contact Male:Brass Female:Beryllium Copper 50 - " gold over 100 - " nickel 50 - " gold over 100 - " nickel
Insulation Teflon None
Gasket Silicone Rubber None
Crimp Ferule Annealed Copper Nickel or Gold

Reverse Polarity Sma Interface

Reverse Polarity Sma Interface

Note : In keeping on going product improvement, we reserve right to make product changes at any time without notice.

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