SMA - 50 Ohm Connectors
For Semi-Rigid Cable
SMA Captivated Solderless Contact
Connectors for Semi-Rigid Cable
The Johnson® captivated solderless contact connectors for semi-rigid cable provide a
unique solution for high frequency cable assemblers. As compared to standard solder-
on connectors with separate center contacts, these SMA connectors offer several key
advantages:
• Assembly is easier and faster than non-captive contact connectors.
• Captivated center contacts allow the complete connector assembly to simply
plug onto the prepared cable. The only soldering required is between the
connector body and cable jacket.
• Rugged center contact socket design reduces potential intermittent signals,
which can be caused by the use of high temperature lead free solder alloys.
• Precision center contacts provide predictable mechanical and electrical
performance. Factory controlled contact location reduces variations in high
frequency electrical performance.
• Electrical performance is similar to non-captive contact connectors.
• Low VSWR is specified to 18 GHz. The connectors can be used at higher
frequencies with very good Return Loss.
• Plug connectors feature durable thickwall style mating interfaces with extended
cutoff frequency to 28 GHz.
• Bulkhead jack connectors are provided with silicone rubber o-rings for
environmental sealing of the flange mounting surface.
• Precision hand assembly tooling assures repeatable performance.
• All connectors meet or exceed the performance requirements of MIL-PRF-39012
captive contact semi-rigid SMA connectors.
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Emerson Network Power • Tel: 800.247.8256 • Fax 507.833.6287 • www.EmersonNetworkPower.com/connectivity
SMA - 50 Ohm Connectors
For Semi-Rigid Cable
MATERIAL SPECIFICATIONS
Bodies:
Brass per QQ-B-626, gold plated* per MIL-G-45204 .00001"
min. or nickel plated per QQ-N-290
Contacts:
Beryllium copper per QQ-C-530, gold plated per
MIL-G-45204 .00005" 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
Seal Rings:
Silicone rubber per ZZ-R-765
* All gold plated parts include a .00005" min. nickel underplate barrier layer.
Mating Engagement for SMA Series per MIL-STD-348
MECHANICAL SPECIFICATIONS
Engagement Design:
MIL-STD-348, Series SMA
Durability:
500 Cycles minimum
Engagement/Disengagement Force:
2 inch-pounds maximum
Mating Torque:
7 to 10 inch-pounds
Bulkhead Mounting Nut Torque:
15 inch-pounds maximum
Coupling Proof Torque:
15 inch-pounds minimum
Coupling Nut Retention:
60 pounds minimum
Contact Retention:
6 pounds minimum axial force
Cable Retention:
Axial Force (lbs) Torque (in-oz)
Connectors for .086 semi-rigid . . . . . . . . 30. . . . . . . . . 16
Connectors for .141 semi-rigid . . . . . . . . 60. . . . . . . . . 55
ENVIRONMENTAL SPECIFICATIONS
(Meets or Exceeds the Applicable Paragraph of MIL-PRF-39012)
Temperature Range:
-65°C to +165°C
Thermal Shock:
MIL-STD-202, Method 107, Condition B - Except
115°C High Temp
Corrosion:
MIL-STD-202, Method 101, Condition B
Shock:
MIL-STD-202, Method 213, Condition I
Vibration:
MIL-STD-202, Method 204, Condition D
Moisture Resistance:
MIL-STD-202, Method 106
+ Avoid applications where hazardous voltages are applied to user
contacted components.
Voltage ratings relate to reliable component operation, not safe application.
Emerson Network Power • Tel: 800.247.8256 • Fax 507.833.6287 • www.EmersonNetworkPower.com/connectivity
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SMA - 50 Ohm Connectors
For Semi-Rigid Cable
ELECTRICAL SPECIFICATIONS
Impedance:
50 Ohms
Frequency Range:
Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0-28 GHz
Jacks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..0-25 GHz
VSWR:
(f = GHz)
Plugs for Cable Type
0-18 GHz
18-28 GHz
.086 semi-rigid . . . . . . . . . . . . . . . . . . . 1.07+.01f
<1.30 Typical
.141 semi-rigid . . . . . . . . . . . . . . . . . . . 1.05+.01f
<1.25 Typical
Jacks for Cable Type
0-18 GHz
18-25 GHz
.086 semi-rigid . . . . . . . . . . . . . . . . . . . 1.07+.01f
<1.30 Typical
.141 semi-rigid . . . . . . . . . . . . . . . . . . . 1.05+.01f
<1.25 Typical
Working Voltage:
(Vrms maximum)
Connectors for Cable Type
Sea Level
70K Feet
.086 semi-rigid . . . . . . . . . . . . . . . . . . . . . 335
85
.141 semi-rigid . . . . . . . . . . . . . . . . . . . . . .500
125
Dielectric Withstanding Voltage:
(Vrms minimum at sea level)
Connectors for Cable Type
.086 semi-rigid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000
.141 semi-rigid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1500
Corona Level:
(Volts minimum at 70,000 feet)
Connectors for Cable Type
.086 semi-rigid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250
.141 semi-rigid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375
Insertion Loss:
0.03 f(GHz), dB maximum, tested at 10 GHz
Insulation Resistance:
5000 Megohms minimum
Contact Resistance:
(milliohms maximum) Initial After Environmental
Center Contact . . . . . . . . . . . . . . . . . . . . . 3.0
5.0
Outer Conductor . . . . . . . . . . . . . . . . . . . . 2.0
Not Applicable
RF Leakage:
(dB minimum, tested at 2.5 GHz) . . . . . . . . . . . . . . . . . . .-90
RF High Potential Withstanding Voltage:
(Vrms minimum, tested at 4 and 7 MHz)
Connectors for Cable Type
.086 semi-rigid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .670
.141 semi-rigid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000
Typical Return Loss
142-0594-421
SMA One Piece Captivated Contact Connectors
Assembled to RG-402 (.141 OD Semi-rigid Cable)
-10
142-0694-061
VSWR = 1.05+.01F
-20
S11 (dB)
-30
-40
-50
-60
0
5
10
15
Frequency (GHz)
20
25
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Emerson Network Power • Tel: 800.247.8256 • Fax 507.833.6287 • www.EmersonNetworkPower.com/connectivity
SMA - 50 Ohm Connectors
For Semi-Rigid Cable
Straight Solder Type Plug With Captivated Solderless
Contact, Captive Nut and Thick Wall Interface
CABLE TYPE
.086 Semi-Rigid
.141 Semi-Rigid
VSWR & FREQ. RANGE
0-18 GHz: 1.07 + .01f (GHz)
18-28 GHz: <1.30 Typical
0-18 GHz: 1.05 + .01f (GHz)
18-28 GHz: <1.25 Typical
GOLD PLATED
142-0693-061
142-0694-061
NICKEL PLATED
142-0693-066
142-0694-066
Assembly instructions on
back page.
Straight Solder Type Bulkhead Jack With Captivated
Solderless Contact and O-Ring
CABLE TYPE
.086 Semi-Rigid
.141 Semi-Rigid
VSWR & FREQ. RANGE
0-18 GHz: 1.07 + .01f (GHz)
18-25 GHz: <1.30 Typical
0-18 GHz: 1.05 + .01f (GHz)
18-25 GHz: <1.25 Typical
GOLD PLATED
142-0593-421
142-0594-421
NICKEL PLATED
142-0593-426
142-0594-426
Assembly instructions and
mounting hole layout
on back page.
Straight Solder Type Bulkhead Jack With Captivated
Solderless Contact and O-Ring
CABLE TYPE
.086 Semi-Rigid
.141 Semi-Rigid
VSWR & FREQ. RANGE
0-18 GHz: 1.07 + .01f (GHz)
18-25 GHz: <1.30 Typical
0-18 GHz: 1.05 + .01f (GHz)
18-25 GHz: <1.25 Typical
GOLD PLATED
142-0593-431
142-0594-431
NICKEL PLATED
142-0593-436
142-0594-436
Assembly instructions and
mounting hole layout
on back page.
Emerson Network Power • Tel: 800.247.8256 • Fax 507.833.6287 • www.EmersonNetworkPower.com/connectivity
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