SMC series RF cable connectors - SMC custom cable assemblies

RF connectors

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Were you in need of custom SMC RF cable assemblies?

Lighthorse Technologies manufactures custom SMC RF cable assemblies in-house at our headquarters in San Diego, CA. Using cutting edge termination equipment we are able to provide quick turn solutions as well as complete testing capabilities. Visit our RF cable assembly wizard or call 1-800-443-3446 to get started!

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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.

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SMC Connector Specifications

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	-

SMC Electrical Ratings

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
Contact Resistance	5 m max	1 m max

SMC Mechanical Ratings

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

SMC Environmental Ratings

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

Materials

		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

VSWR

Cable Type	Frequency Range
Cable Type	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