SMA connector male straight crimp for RG174, RG316 coax cable

SMA connector male straight crimp for RG174, RG316 coax cable


This male SMA connector is a cable connector which is designed to terminate with thicker coaxial cables. The biggest coaxial cable this SMA connector can terminate is LMR 400 which has 10.3mm diameter.

All kinds of RF coaxial cable for SMA male straight crimp type are RG174, RG316, RG58, RG223, LMR 400, LMR240, LMR195, LMR200, RG188, LMR100, RG142, RG400, RG141, RG303, RG55, B7806A, B7807A, RG8X, Belden 8214, Belden 9913, H1000.

The SMA adaptor cable/ SMA connector cable/ SMA Cable assembly are used in various RF markets, like GPS antenna, GSM antenna, WLAN and so on. Wellshow not only can provide you SMA gold plug, but also nickel type. If you want to cost down, SMA connector nickel plug will be your best option.

SMA connector is an acronym for SubMiniature version A and was developed in the 1960’s. Built in accordance with MIL-C-39012 and CECC 22110/111, SMA connectors are designed per SMA interface dimensions.

If you need SMA connector for mini coaxial cable like 0.81, 1.13, 1.32, 1.37, 1.48 or RG178, please link here.

Part Numbers

P/N & DrawingDescriptionCable GroupOhm
SMA straight crimp plug
SMA straight crimp plug
SMA straight crimp plug
SMA straight crimp plug
SMA straight crimp plug
SMA straight crimp plug
SMA straight crimp plug
SMA straight crimp plug (Nickel)
RG174, RG316, RG188, LMR100
RD316 (double shielding)
RG58, RG141, RG303, LMR195, B7806A
RG142, RG400, RG55
LMR200, B7807A
LMR240, RG8/X, Belden 8214
LMR400, H1000, B9913, RG8/U


Cable Assembly

Cable assembly Instructions Crimp type

Step1. All parts of SMA RF connector are shown as the top line.

Step2. Strip the RF coaxial cable into center conductor, insulator, shielding three parts per recommended stripping dimension shown in SMA RF connector spec.

Step3. Slide the heat shrinking tube, then ferrule onto the cable jacket.

Step4. Insert the center conductor of the cable into the contact pin of SMA plug and then solder through the side hole.

Step5. Spread out the shielding and put the contact pin into main body until it stops, and then cover shielding onto the knurled barrel.

Step6. Slide the ferrule over the shielding, and proceed the first open-short test to make sure signal can transmit well.

Step7. Crimp the ferrule.

Step8. Heat shrink the shirking tube.

Step9. Do the open-short test of every cable assembly before QC examination.



SMA Connector Technical Characteristics

Impedance50 ohm
Frequency range0 ~ 18 GHz
VSWRStraight type ≤ 1.3 max.
R/A type ≤ 1.5 max.
Dielectric withstanding voltage1000 V rms min. for RG142, RG405
750 V rms min. for RG316, RG402
500 V rms min. for RG178
Working voltage500 V rms max. for RG142, RG405
375 V rms max. for RG316, RG402
170 V rms max. for RG178
Center contact resistance≤ 6.0 mΩ (Milliohms max.)
Outer contact resistance≤ 2.0 mΩ (Milliohms max.)
Insulation resistance≥ 5×103 MΩ (Megohms min.)
Coupling1/4-36 thread
Contact Retention15 in-lbs. min.
Mating torque2 in-lbs. min.
Mating Durability500 cycles min. (For Beryllium copper contact only)
Temperature Range−65ºC ~ +155 ºC
VibrationMIL-STD-202 Meth. 204
Corrosion resistanceMIL-STD-202 Meth. 101
Body, coupling nutBrass, Non-magnetic stainless steel
Center contactBrass for male, Beryllium copper for female
Crimping sleeveAnnealed Brass
Body platingNickel (Ni), Gold (Au), Passivated
Center contact platingGold (Au)

Note: These characteristics are typical and may not apply to all connectors.