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SMB Series RF Connectors
RF Connectors > SMB Series RF Connectors
Description
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.
Features & Benefits
- Broadband performance with low reflection DC to 4 GHz provides low cost connector combined with high quality.
- Quick connect/disconnect snap-on mating reduces installation time.
- Various plating options in nickel, gold, and tin lead. Selective plating provides corrosion resistance finish as well as good solderability characteristics.
- 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.
Applications
- Automotive
- Automotive (GPS)
- Base Stations
- Cable Assemblies
- Components
- Instrumentation
- PC/LAN
- Process Controls
- Radio Boards
- Surge Protection
- Telecom
- Test & Measurement
- Video Systems
| 50 Ω SMB Specifications | |
| 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) |
| 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 |
| 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 |
| RF Leakage | -55 dB minimum @ 2-3 GHz |
| 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 |
| Connector Durability | 500 mating cycles minimum |
| Center Contact | Female: beryllium copper, gold-plated Male: brass or beryllium copper, gold-plated |
| 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 |
| 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 |
| 75 Ω SMB Specifications | |
| 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) |
| 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 |
| 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 |
| RF Leakage | -55 dB minimum @ 2-3 GHz |
| 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 |
| Connector Durability | 500 mating cycles minimum |
| Center Contact | Female: beryllium copper, gold-plated Male: brass or beryllium copper, gold-plated |
| 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 |
| 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 |
| 75 Ω High Density SMB Specifications | |
| 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 |
| VSWR | Straight connector, 735A: 1.25 + .04 f (GHz) Right angle connector, 735A: 1.35 + .04 f (GHz) |
| 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 |
| 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 |
| RF Leakage | -55 dB minimum @ 2-3 GHz |
| 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 |
| Connector Durability | 500 mating cycles minimum |
| Center Contact | Female: beryllium copper, gold-plated Male: brass or beryllium copper, gold-plated |
| 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 |
| 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 |
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