SMC RF connectors are semi-precision, subminiature devices that provide repeatable electrical performance from DC to 10 GHz. The SMC family of connectors fill subminiature requirements, while providing a semi-permanent connection with their screw on mating mechanism. They are best suited for use with cables in the range of .070" to .120" diameters, such as RG-178, RG-174, and RG-316. The series is similar in size to SMB connectors. LTI SMC type connectors are designed to conform to MIL-C-39012 specifications.
Typical applications for SMC connectors are telecommunications, test equipment, instrumentation and GPS.
SMC Plug
|
SMC Jack
|
|
|
|
Letter
|
Minimum
|
Maximum
|
|
A
|
2.79
|
-
|
|
B
|
-
|
2.06
|
|
C
|
3.37
|
3.81
|
|
D
|
0.00
|
-
|
|
E
|
2.79
|
-
|
|
F
|
-
|
3.10
|
|
G
|
-
|
3.40
|
|
H
|
-
|
3.40
|
|
I
|
-
|
5.92
|
|
-
|
-
|
-
|
|
-
|
-
|
-
|
|
|
Letter
|
Minimum
|
Maximum
|
|
A
|
5.94
|
-
|
|
B
|
3.12
|
3.38
|
|
C
|
-
|
2.13
|
|
D
|
-
|
0.25
|
|
E
|
0.48
|
0.53
|
|
F
|
2.08
|
-
|
|
G
|
-
|
3.71
|
|
H
|
0.00
|
0.30
|
|
I
|
0.61
|
-
|
|
J
|
3.40
|
3.66
|
|
K
|
3.40
|
-
|
|
| Impedance |
50 ohm |
|
| Frequency Range |
DC to 4 GHz |
|
| |
RG-174,188,316 |
RG-178,196 |
| Dielectric Withstanding Voltage (at sea level, in V rms, 50 Hz) |
1000 |
750 |
| Working Voltage (at sea level, in V rms, 50 Hz) |
335 max |
250 max |
| Insulation Resistance |
1000 M min |
|
| RF Leakage |
-55dB max @ 2.5 GHz |
|
| Insertion Loss |
Straight |
Right Angle |
| |
.3dB max @ 1.5 GHz |
.6dB max @ 1.5 GHz |
| Contact Resistance |
Center Contact |
Outer Contact |
| 5 m max |
1 m max |
|
Mating
|
1/4"-36 threaded coupling
|
|
|
|
Brass
|
Stainless Steel
|
|
Durability
|
100 matings max
|
500 matings max
|
|
Coupling Proof Torque
|
5.3 in-lbs
|
15 in-lbs
|
|
Coupling Nut Retention Force
|
60.7 lbs min
|
60.7 lbs min
|
|
Contact Captivation - Axial
|
6.1 lbs min
|
6.1 lbs min
|
|
Cable Retention
|
RG 174, 188, 316
|
RG 178, 196
|
|
|
12.1 lbs min
|
7.3 lbs min
|
|
Temperature Range
|
-65C to +165C
|
|
|
Thermal Shock
|
MIL-STD-202, Method 1017, Condition A
|
|
|
Vibration
|
MIL-STD-202, Method 204, Condition D
|
|
|
Corrosion
|
MIL-STD-202, Method 101, Condition B
|
|
|
Temperature Cycling
|
MIL-STD-202, Method 1003, Condition A
|
|
|
|
|
Material
|
Plating
|
|
Connector Body
|
|
Brass per QQ-B-626
|
Gold/Nickel
|
|
Center Contact
|
Male
|
Brass per QQ-B-626
|
Gold
|
|
|
Female
|
Beryllium Copper per QQ-C-530
|
Gold
|
|
Insulator
|
|
Teflon
|
None
|
|
Gasket
|
|
Silicone Rubber
|
None
|
|
Crimp Ferrule
|
|
Annealed Copper per WW-T-799
|
Same as body
|
|
Cable Type |
Frequency Range |
|
|
1 GHz
|
3 GHz
|
4 GHz |
|
RG 55,142,223,400 |
1.15 |
1.35 |
1.35 |
Typical VSWR for SMC straight connectors |
|
RG 58 |
1.15 |
1.35 |
1.35 |
|
RG 174,188,316
|
1.15
|
1.35
|
1.35
|
|
RG 178,196
|
1.15
|
1.35
|
1.35
|
|
Semi Rigid .086"
|
1.15
|
1.15
|
1.35
|
|
RG 55,142,223,400 |
1.15 |
1.3 |
1.3 |
Typical VSWR for SMC right angle connectors |
|
RG 58 |
1.15 |
1.3 |
1.3 |
|
RG 174,188,316
|
1.15
|
1.3
|
1.3
|
|
RG 178,196
|
1.15
|
1.3
|
1.3
|
|
Semi Rigid .086"
|
1.15
|
1.3
|
1.3
|
|
Semi Rigid .141"
|
1.15
|
1.3
|
1.3
|
