SMA connector male straight crimp for RG178, 1.13mm coax cable

SMA connector male straight crimp for RG178, 1.13mm coax cable


SMA coax connector is a precision coaxial connector for microwave applications. SMA RF connectors have a thread interface and 50 ohm dependence just like N, FME, SMA, SMC RF connectors and so on. It can be crimped with RF coaxial cable from 0.81mm, 1.13mm, 1.32mm, 1.37mm, 1.48mm, to RG178.

SMA connector has complete and full production line than other RF cable connectors. SMA connector is a mature RF connector and has big demands.

Besides SMA straight crimp plug, we still have SMA right angle crimp plug. Various RF SMA connectors are widely used in Telecommunication, Vehicle Tracking System, Wireless LAN and so on.

Part Numbers

P/N & Drawing Description Cable Group Ohm
SMA straight crimp plug
SMA straight crimp plug
SMA straight crimp plug
SMA straight crimp plug
SMA straight crimp plug
SMA straight crimp plug

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

Impedance 50 ohm
Frequency range 0 ~ 18 GHz
VSWR Straight type ≤ 1.3 max.
R/A type ≤ 1.5 max.
Dielectric withstanding voltage 1000 V rms min. for RG142, RG405
750 V rms min. for RG316, RG402
500 V rms min. for RG178
Working voltage 500 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.)
Coupling 1/4-36 thread
Contact Retention 15 in-lbs. min.
Mating torque 2 in-lbs. min.
Mating Durability 500 cycles min. (For Beryllium copper contact only)
Temperature Range −65ºC ~ +155 ºC
Vibration MIL-STD-202 Meth. 204
Corrosion resistance MIL-STD-202 Meth. 101
Body, coupling nut Brass, Non-magnetic stainless steel
Insulator Teflon
Center contact Brass for male, Beryllium copper for female
Crimping sleeve Annealed Brass
Body plating Nickel (Ni), Gold (Au), Passivated
Center contact plating Gold (Au)

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