SMA - 50 Ohm Connectors
Specifications
INCHES (MILLIMETERS)
CUSTOMER DRAWINGS AVAILABLE UPON REQUEST
ELECTRICAL RATINGS
Impedance:
50 ohms
Frequency Range:
Dummy loads .......................................................................... 0-2 GHz
Flexible cable connectors ................................................... 0-12.4 GHz
Uncabled receptacles, RA semi-rigid and adapters ........... 0-18.0 GHz
Straight semi-rigid cable connectors and
field replaceable connectors ............................................... 0-26.5 GHz
VSWR:
(f = GHz)
Straight
Right Angle
Cabled Connectors Cabled Connectors
RG-178 cable .............................. 1.20 + .025f
1.20 + .03f
RG-316, LMR-100 cable .............. 1.15 + .02f
1.15 + .03f
RG-58, LMR-195 cable ................ 1.15 + .01f
1.15 + .02f
RG-142 cable ............................... 1.15 + .01f
1.15 + .02f
LMR-200, LMR-240 cable ............ 1.10 + .03f
1.10 + .06f
.086 semi-rigid ............................ 1.07 + .008f
1.18 + .015f
.141 semi-rigid (w/contact) .......... 1.05 + .008f
1.15 + .015f
.141 semi-rigid (w/o contact) ...... 1.035 + .005f
Jack-bulkhead jack adapter and plug-plug adapter ................. 1.05 + .01f
Jack-jack adapter and plug-jack adapter ............................... 1.05 + .005f
Uncabled receptacles, dummy loads .................................................. N/A
Field replaceable (see
page 59) .........................................................
N/A
Working Voltage:
(Vrms maximum)
Connectors for Cable Type
Sea Level 70K Feet
RG-178 ...................................................................... 170
45
RG-316; LMR-100, 195, 200 ..................................... 250
65
RG-58, RG-142, LMR-240, .086 semi-rigid,
uncabled receptacles, .141 semi-rigid w/o contact ... 335
85
.141 semi-rigid with contact and adapters ................. 500
125
Dummy loads ................................................................................. N/A
Dielectric Withstanding Voltage:
(VRMS minimum at sea level)
Connectors for RG-178 ................................................................... 500
Connectors for RG-316; LMR-100, 195, 200 .................................. 750
Connectors for RG-58, RG-142, LMR-240, .086 semi-rigid,
field replaceable, uncabled receptacles ...................................... 1000
Connectors for .141 semi-rigid with contact and adapters ............ 1500
Connectors for .141 semi-rigid w/o contact, dummy loads .............. N/A
Corona Level:
(Volts minimum at 70,000 feet)
Connectors for RG-178 ................................................................... 125
Connectors for RG-316; LMR-100, 195, 200 .................................. 190
Connectors for RG-58, RG-142, LMR-240, 086 semi-rigid,
uncabled receptacles, .141 semi-rigid w/o contact .......................... 250
Connectors for .141 semi-rigid with contact and adapters .............. 375
Dummy loads ...................................................................................... N/A
Insertion Loss:
(dB maximum)
Straight flexible cable connectors
and adapters ...................... 0.06 f (GHz), tested at 6 GHz
Right angle flexible cable
connectors ......................... 0.15 f (GHz), tested at 6 GHz
Straight semi-rigid cable
connectors with contact ..... 0.03 f (GHz), tested at 10 GHz
Right angle semi-rigid cable
connectors ......................... 0.05 f (GHz), tested at 10 GHz
Straight semi-rigid cable
connectors w/o contact ...... 0.03 f (GHz), tested at 16 GHz
Straight low loss flexible
cable connectors ................ 0.06 f (GHz), tested at 1 GHz
Right Angle low loss flexible
cable connectors ................ 0.15 f (GHz), tested at 1 GHz
Uncabled receptacles, field replaceable, dummy loads ..................... N/A
Insulation Resistance:
5000 megohms minimum
Contact Resistance:
(milliohms maximum)
Initial After Environmental
Center contact (straight cabled connectors
and uncabled receptacles) ........................... 3.0*
4.0*
Center contact (right angle cabled
connectors and adapters) .............................. 4.0
6.0
Field replaceable connectors ........................ 6.0
8.0
Outer contact (all connectors) ........................... 2.0
N/A
Braid to body (gold plated connectors) ............. 0.5
N/A
Braid to body (nickel plated connectors) ........... 5.0
N/A
*N/A where the cable center conductor is used as a contact
RF Leakage:
(dB minimum, tested at 2.5 GHz)
Flexible cable connectors, adapters and .141 semi-rigid
connectors w/o contact ............................................................. -60 dB
Field replaceable w/o EMI gasket .............................................. -70 dB
.086 semi-rigid connectors and .141 semi-rigid connectors
with contact, and field replaceable with EMI Gasket ................ -90 dB
Two-way adapters ...................................................................... -90 dB
Uncabled receptacles, dummy loads .............................................. N/A
RF High Potential Withstanding Voltage:
(Vrms minimum, tested at 4
and 7 MHz)
Connectors for RG-178 ................................................................... 335
Connectors for RG-316; LMR-100, 195, 200 .................................. 500
Connectors for RG-58, RG-142, LMR-240, .086 semi-rigid,
.141 semi-rigid cable w/o contact, uncabled receptacles .............. 670
Connectors for .141 semi-rigid with contact and adapters ............ 1000
Power Rating (Dummy Load):
0.5 watt @ + 25°C, derated to 0.25 watt @
+125°C
MECHANICAL RATINGS
Engagement Design:
MIL-C-39012, Series SMA
Engagement/Disengagement Force:
2 inch-pounds maximum
Mating Torque:
7 to 10 inch-pounds
Bulkhead Mounting Nut Torque:
15 inch-pounds
Coupling Proof Torque:
15 inch-pounds minimum
Coupling Nut Retention:
60 pounds minimum
Contact Retention:
6 lbs. minimum axial force (captivated contacts)
4 inch-ounce minimum torque (uncabled receptacles)
Cable Retention:
Axial Force*(lbs) Torque (in-oz)
Connectors for RG-178 ............................ 10
N/A
Connectors for RG-316, LMR-100 ........... 20
N/A
Connectors for LMR-195, 200 .................. 30
N/A
Connectors for RG-58, LMR-240 ............. 40
N/A
Connectors for RG-142 ............................ 45
N/A
Connectors for .086 semi-rigid ................. 30
16
Connectors for .141 semi-rigid ................. 60
55
*Or cable breaking strength whichever is less.
Durability:
500 cycles minimum
100 cycles minimum for .141 semi-rigid connectors w/o contact
(Meets or exceed the applicable paragraph of MIL-C-39012)
Temperature Range:
- 65°C to + 165°C
Thermal Shock:
MIL-STD-202, Method 107, Condition B
Corrosion:
MIL-STD-202, Method 101, Condition B
ENVIRONMENTAL RATINGS
Shock:
MIL-STD-202, Method 213, Condition I
Vibration:
MIL-STD-202, Method 204, Condition D
Moisture Resistance:
MIL-STD-202, Method 106
†Avoid user injury due to misapplication. See safety advisory definitions inside front cover.
Cinch Connectivity Solutions
299 Johnson Avenue SW, Waseca, MN 56093 USA • 800.247.8256 • +1 507 833 8822 • cinchconnectivity.com
SMA - 50 Ohm Connectors
End Launch Connectors - A Johnson Components
TM
Original
INCHES (MILLIMETERS)
CUSTOMER DRAWINGS AVAILABLE UPON REQUEST
The
End Launch
connector is attached to the circuit board by inserting
the board edge between the legs and soldering the legs and center con-
ductor to pads on the board. For optimum high frequency performance,
the connector to circuit board transition must be adjusted for low VSWR.
To compensate for the transition from coax to microstrip, trace widths “A”
and “B” must be adjusted based on circuit board thickness. When prop-
erly adjusted, this technique yields a low VSWR over a wide bandwidth.
The tabulated dimensions "A", "B", "C", "D", and "E" were determined
experimentally to achieve low VSWR (typically less than 1.5 up to 18
GHz). The circuit board used for these tests was double-sided FR 4 with
1 oz. copper on both sides. The copper was left on the bottom of the
board to create a ground plane for the 50 Ohm microstrip structure. While
not all inclusive, these dimensions are given as reference information for
selected
SMA End Launch
connectors. Further adjustments may be
necessary depending upon the application. All dimensions are in inches.
Tabulated Dimensions "A", "B", "C" and "D" are symmetrical about the center line
Part
Number
142-0701-801/806
142-0701-851/861
142-0701-871/876
142-0711-821/826
142-0711-871/876
142-0711-881/886
142-0701-881/886
Base
Width
.375
.375
.375
.250
.375
.375
.375
Board
Thick
.062
.062
.062
.062
.047
.047
.031
"A"
.103
.103
.103
.103
.083
.083
.050
"B"
.090
.090
.090
.070
.075
.075
.045
"C"
.250
.250
.250
.170
.250
.250
.250
"D"
.440
.440
.440
.380
.440
.440
.440
"E"
.200
.200
.200
.165
.200
.200
.200
Surface Mount Versions Available!
SMA End Launch Specifications
ENVIRONMENTAL RATINGS:
(Meets or exceeds the applicable paragraph of MIL-C-39012)
Temperature Range:
-65
o
to + 165
o
C
Thermal Shock:
MIL-STD-202, Method 107, Condition B
Corrosion:
MIL-STD-202, Method 101, Condition B
Shock:
MIL-STD-303, Method 213, Condition I
Vibration:
MIL-STD-202, Method 204, Condition D
Moisture Resistance:
MIL-STD-202, Method 106
MATERIAL SPECIFICATIONS
Bodies:
Brass per QQ-B-626, gold plated* per MIL-G-45204 .00001” min.
or nickel plated per QQ-N-290
Contacts:
Male - brass per QQ-B-626, gold plated per MIL-G-45204 .00003”
min.
Female - beryllium copper per QQ-C-530, gold plated per MIL-G-45204
.00003” min.
Nut Retention Spring:
Beryllium copper per QQ-C-533. Unplated
Insulators:
PTFE fluorocarbon per ASTM D 1710 and ASTM D 1457
Mounting Hardware:
Brass per QQ-B-626 or QQ-B-613, gold plated per
MIL-G-45204 .00001” min. or nickel plated per QQ-N-290
*All gold plated parts include a
.00005” min. nickel underplate barrier layer.
ELECTRICAL RATINGS
Impedance:
50 Ohms
Frequency Range:
0-18 GHz
VSWR:
Dependent upon application
Working Voltage
(VRMS max.): 335 @ Sea Level, 85 @ 70K Feet
Dielectric Withstanding Voltage
(VRMS min. at sea level): 1000
Corona Level
(Volts min. at 70,000 feet): 250
Insulation Resistance:
5000 megohms min
Contact Resistance
(milliohms max.): 3.0 Initial, 4.0 after environmental
RF High Potential Withstanding Voltage
(VRMS min. tested at 4 and 7
MHz): 670
MECHANICAL RATINGS
Engagement Design:
MIL-C-39012, Series SMA
Engagement/Disengagement Force:
2 inch-pounds max.
Mating Torque:
7 to 10 inch-pounds
Coupling Proof Torque:
15 inch-pounds min.
Coupling Nut Retention:
60 pounds min.
Contact Retention Force:
6 lbs min. axial force, 4 inch-ounce min. torque
Durability:
500 cycles min.
Cinch Connectivity Solutions
299 Johnson Avenue SW, Waseca, MN 56093 USA • 800.247.8256 • +1 507 833 8822 • cinchconnectivity.com
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