Product Pages
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The SMB name derives from SubMiniature B (the second subminiature
design). Developed in the 1960's, the SMB is a smaller version of
the SMA with snap-on coupling. Amphenol's SMB connectors conform to
the requirements of MIL-C-39012, and the interface is in compliance
with MIL-STD-348. Available in 50 Ω
and 75 Ω impedance, the SMB provides
broadband capability through 4 GHz with a snap-on connector design
and utilizes die cast components on non-critical areas to provide
a low-cost solution.
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Broadband performance
with low reflection DC to 4 GHz provides low cost connector
combined with high quality. |
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Quick connect/disconnect
snap-on mating reduces installation time. |
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Various plating options
in nickel, gold, and tin lead. Selective plating provides corrosion
resistance finish as well as good solderability characteristics. |
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SMB PCB slide-on plug
and jack allows board-to-board mounting with a low insertion
force. This is ideal for mating a high number of connectors
on a pair of PCB's. |
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Automotive |
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Automotive (GPS) |
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Base Stations |
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Cable Assemblies |
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Components |
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Instrumentation |
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PC/LAN |
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Process Controls |
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Radio Boards |
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Surge Protection |
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Telecom |
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Test and Measurement |
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Video Systems |
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| Impedance |
50 Ω |
| Frequency Range |
0-4 GHz with low reflection; usable to 10.0 GHz |
| Voltage Rating for RG-188/U Cable |
335 volts at sea level and 85 volts at 70,000 feet |
| Dielectric Withstanding Voltage |
RG-196: 750 VRMS; RG-188: 1,000 VRMS |
| VSWR |
Straight connector, RG-196/U: 1.30 + .04 f (GHz)
Right angle connector, RG-196/U: 1.45 + .06 f (GHz)
Straight connector, RG-188/U: 1.25 + .04 f (GHz)
Right angle connector, RG-188/U: 1.35 + .04 f (GHz)
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| Contact Resistance |
Center contact: 6.0 mΩ initial, 8.0 after environmental;
Outer contact: 1.0 mΩ initial, 1.5 after environmental
Braid to body: 1.0 mΩ initial, after environmental N/A
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| Insulation Resistance |
1,000 MΩ minimum |
| Insertion Loss |
Straight connector: 0.30 dB @ 1.5 GHz
Right angle connector: 0.60 dB @ 1.5 GHz
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| RF Leakage |
-55 dB minimum @ 2-3 GHz |
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| Mating |
Snap-on coupling per MIL-STD-348 |
| Braid/Jacket Cable Affixment |
Hex crimp |
| Center Conductor Cable Affixment |
Solder |
| Contact Captivation |
All types unless noted otherwise |
| Cable Retention |
Equal to breaking strength of cable employed |
| Engagement Forces |
Engagement: 14 lbs maximum
Disengagement: 2 lbs minimum
After 500 matings, 14 lbs maximum engagement and disengagement
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| Connector Durability |
500 mating cycles minimum |
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| Center Contact |
Female: beryllium copper, gold-plated
Male: brass or beryllium copper, gold-plated
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| Outer Contact Plating |
Nickel or gold plating as indicated |
| Body |
Brass per QQB-626, or zinc per ASTM B86-71 |
| Body Plating |
Nickel or gold plating as indicated |
| Insulator |
TFE |
| Crimp Ferrule |
Annealed copper alloy |
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| Temperature Range |
- 65°C to +165°C |
| Thermal Shock |
MIL-STD-202 method 107, test condition B (except high temperatures
@ 200°C |
| Shock |
MIL-STD-202 method 202, method 13, snap-on, test condition
B; 75 G's @ 6 milliseconds ½ sine |
| Vibration |
MIL-STD-202 method 204, snap-on, test condition B; (15 G's) |
| Corrosion |
MIL-STD-202 method 101, test condition B. 5% salt solution |
Note: These characteristics are typical but may not apply to
all connectors.
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| Impedance |
75 Ω |
| Frequency Range |
0-4 GHz with low reflection; usable to 10.0 GHz |
| Voltage Rating for RG-188/U Cable |
335 volts at sea level and 85 volts at 70,000 feet |
| Dielectric Withstanding Voltage |
1,000 VRMS |
| RF High Potential Withstanding Voltage |
RF-195/U series: 500 VRMS |
| Corona Level |
RG-195/U series: 400 volts minimum @ 70,000 ft |
| VSWR |
Straight connector, RG-196/U: 1.30 + .04 f (GHz)
Right angle connector, RG-196/U: 1.45 + .06 f (GHz)
Straight connector, RG-188/U: 1.25 + .04 f (GHz)
Right angle connector, RG-188/U: 1.35 + .04 f (GHz)
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| Contact Resistance |
Center contact: 6.0 mΩ initial, 8.0 after environmental;
Outer contact: 1.0 mΩ initial, 1.5 after environmental
Braid to body: 1.0 mΩ initial, after environmental N/A
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| Insulation Resistance |
1,000 MΩ minimum |
Insertion Loss
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Straight connector: 0.30 dB @ 1.5 GHz
Right angle connector: 0.60 dB @ 1.5 GHz |
| RF Leakage |
-55 dB minimum @ 2-3 GHz |
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| Mating |
Snap-on coupling per MIL-STD-348 |
| Braid/Jacket Cable Affixment |
Hex crimp |
| Center Conductor Cable Affixment |
Solder |
| Contact Captivation |
All types unless noted otherwise |
| Cable Retention |
Equal to breaking strength of cable employed |
| Engagement Forces |
Engagement: 14 lbs maximum
Disengagement: 2 lbs minimum
After 500 matings, 14 lbs maximum engagement and disengagement
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| Connector Durability |
500 mating cycles minimum |
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| Center Contact |
Female: beryllium copper, gold-plated
Male: brass or beryllium copper, gold-plated
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| Outer Contact Plating |
Nickel or gold plating as indicated |
| Body |
Brass per QQB-626 |
| Body Plating |
Nickel or gold plating as indicated |
| Insulator |
TFE |
| Crimp Ferrule |
Annealed copper alloy |
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| Temperature Range |
- 65°C to +165°C |
| Thermal Shock |
MIL-STD-202 method 107, test condition B (except high temperatures
@ 200°C |
| Shock |
MIL-STD-202 method 213, snap-on, test condition B; 75 G's
@ 6 milliseconds ½ sine |
| Vibration |
MIL-STD-202 method 202, snap-on, test condition B; (15 G's) |
| Corrosion |
MIL-STD-202 method 101, test condition B. 5% salt solution |
Note: These characteristics are typical but may not apply to
all connectors.
|
| Impedance |
75 Ω |
| Frequency Range |
0-4 GHz with low reflection; usable to 10.0 GHz |
| Voltage Rating for RG-188/U Cable |
335 volts at sea level and 85 volts at 70,000 feet |
| Dielectric Withstanding Voltage |
RG-196: 750 VRMS
RG-188: 1,000 VRMS
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| VSWR |
Straight connector, 735A: 1.25 + .04 f (GHz)
Right angle connector, 735A: 1.35 + .04 f (GHz)
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| Contact Resistance |
Center contact: 6.0 mΩ initial, 8.0 after environmental;
Outer contact: 1.0 mΩ initial, 1.5 after environmental
Braid to body: 1.0 mΩ initial, after environmental N/A
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| Insulation Resistance |
1,000 MΩ minimum |
| Insertion Loss |
Straight connector: 0.30 dB @ 1.5 GHz
Right angle connector: 0.60 dB @ 1.5 GHz
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| RF Leakage |
-55 dB minimum @ 2-3 GHz |
Mechanical |
| Mating |
Snap-on coupling per MIL-STD-348 |
| Braid/Jacket Cable Affixment |
Hex crimp |
| Center Conductor Cable Affixment |
Solder or crimp |
| Contact Captivation |
All types unless noted otherwise |
| Cable Retention |
Equal to breaking strength of cable employed Engagement Forces |
| Engagement Forces |
Engagement: 14 lbs maximum
Disengagement: 2 lbs minimum
After 500 matings, 14 lbs maximum engagement and disengagement
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| Connector Durability |
500 mating cycles minimum |
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| Center Contact |
Female: beryllium copper, gold-plated
Male: brass or beryllium copper, gold-plated
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| Outer Contact Plating |
Nickel or gold plating as indicated |
| Body |
Brass per QQB-626 |
| Body Plating |
Nickel or gold plating as indicated |
| Insulator |
TFE |
| Crimp Ferrule |
Annealed copper alloy |
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| Temperature Range |
- 65°C to +165°C |
| Thermal Shock |
MIL-STD-202 method 107, test condition B (except high temperatures
@ 200°C |
| Shock |
MIL-STD-202 method 213, snap-on, test condition B; 75 G's
@ 6 milliseconds ½ sine |
| Vibration |
MIL-STD-202 method 202, snap-on, test condition B; (15 G's) |
| Corrosion |
MIL-STD-202 method 101, test condition B. 5% salt solution |
Note: These characteristics are typical but may not apply to
all connectors.
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