Cable Group Listing
36
Amphenol® RF: 800-627-7100
36
Amphenol® RF: 800-627-7100
SMB Connectors
Description
The SMB name derives from SubMiniature B (the second subminiature design). Developed
in the 1960’s, this sub miniature interface has 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, the SMB provides broadband capability through 10 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reection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.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
• BaseStations
• CableAssemblies
• Components
• Instrumentation
• PC/LAN
• ProcessControls
• RadioBoards
• SurgeProtection
• Telecom
• TestandMeasurement
• VideoSystems
SMB
SMB
Amphenol® RF
37
Amphenol® RF: 800-627-7100
50 Ω SMB Specifications
Electrical
Impedance 50 Ω
Frequency range DC - 4 GHz (usable to 10 GHz)
VSWR 1.2 max. @ DC - 4 GHz
1.5 max. @ 4 - 10 GHz
RF-leakage 55 dB minimum @ 1 GHz (flexible cable)
Voltage rating (at sea level) ≥ 250 Vrms (depending on cable)
Contact resistance center contact: ≤ 6 mΩ
outer contact: ≤ 2.5 mΩ
braid to body: ≤ 1 mΩ
Insulation resistance 5,000 MΩ minimum
Insertion loss maximum 0.3 dB @ 1.5 GHz
Dielectric withstanding voltage 1,000 Vrms (at sea level)
Mechanical
Mating Snap-on coupling (MIL-STD-348)
Braid/Jacket cable affixment Hex crimp
Center conductor cable affixment Solder
Captivated contacts All, unless noted otherwise
Engagement force ≤ 14.2 lbs (63N)
Disengagement force ≥ 1.8 lbs (8N)
Durability (matings) 500 cycles minimum
Environmental
Temperature range -65°C to +165°C
Thermal shock MIL-STD-202, method 107, cond. B
Moisture resistance MIL-STD-202, method 106
Corrosion MIL-STD-202, method 101, cond. B
Vibration MIL-STD-202, method 204, cond. D
Mechanical shock MIL-STD-202, method 213, cond. B
SMB
SMB
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Amphenol® RF: 800-627-7100
50 Ω SMB Specifications (continued)
Material
Body and outer contacts Body: brass or zinc alloy (ASTM-B86-71), gold or nickel plated
Male contact Brass, gold plated
Female contact Beryllium copper or phosphor bronze, gold plated
Crimp ferrule Copper or brass, nickel or gold plated
Insulator PTFE
Military
MIL-C-22557A where applicable
Plug Jack
.007/.037
.007 MIN
ø.081 MAX
.064 MAX
.141 MIN
.141 MIN
.117
REF PLANE
MIN
L
C
.007
.065
.117
.010
MIN
.052
ø.021/.019
.010 MIN
.141/.131
.000 MIN
ø.082 MIN
ø.146 MAX
MAX
MAX
REF PLANE
MIN
MAX
SMB
SMB
39
Amphenol® RF: 800-627-7100
75 Ω SMB Specifications
Electrical
Impedance 75 Ω
Frequency range DC - 4 GHz
VSWR 1.4 max. @ DC - 4 GHz
RF-leakage 55 dB minimum @ 1 GHz (flexible cable)
Voltage rating (at sea level) ≥ 250 Vrms (depending on cable)
Contact resistance center contact: ≤ 6 mΩ
outer contact: ≤ 1 mΩ
braid to body: ≤ 1 mΩ
Insulation resistance 5,000 MΩ minimum
Insertion loss maximum 0.3 dB @ 1.5 GHz
Dielectric withstanding voltage 1,000 Vrms (at sea level)
Mechanical
Mating Snap-on coupling (MIL-STD-348)
Braid/Jacket cable affixment Hex crimp
Center conductor cable affixment Solder
Captivated contacts All, unless noted otherwise
Engagement force ≤ 14.2 lbs (63N)
Disengagement force ≥ 1.8 lbs (8N)
Durability (matings) 500 cycles minimum
Environmental
Temperature range -65°C to +165°C
Thermal shock MIL-STD-202, method 107, cond. B
Moisture resistance MIL-STD-202, method 106
Corrosion MIL-STD-202, method 101, cond. B
Vibration MIL-STD-202, method 204, cond. D
Mechanical shock MIL-STD-202, method 213, cond. B
SMB
SMB
40
Amphenol® RF: 800-627-7100
SMB
SMB
75 Ω SMB Specifications (continued)
Material
Body and outer contacts Body: brass or zinc alloy (ASTM-B86-71), gold or nickel plated
Male contact Brass, gold plated
Female contact Beryllium copper or phosphor bronze, gold plated
Crimp ferrule Copper or brass, nickel or gold plated
Insulator PTFE
Military
MIL-C-22557A where applicable
Note: These characteristics are typical but may not apply to all connectors.
Plug Jack
ø.130 MAX
.141 MIN
.141 MIN
.117 MIN
.007/.037
.007 MIN
.064 MAX
REF PLANE
ø.021/.019
.141/.131
.117
.007
.065 MIN
.052 MIN
.010 MIN
.000 MIN
ø.244 MAX
ø.131 MIN
.010 MAX
MAX
MAX
REF PLANE
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Amphenol® RF: 800-627-7100 SMB
50 Ω Cable Connectors
Straight Plugs
Plating Termination
Cable Group Part Number Body Contact Body Contact
A 903-287P-51S Gold Gold Crimp Solder
A 903-509P-51S Gold Gold Crimp Solder
A 903-371P-51S Nickel Gold Crimp Solder
A 903-578P-51S Gold Gold Crimp Crimp
A 903-578P-51S1 Nickel Gold Crimp Crimp
B 903-285P-51S Gold Gold Crimp Solder
B 903-370P-51S Nickel Gold Crimp Solder
B 903-577P-51S1 Nickel Gold Crimp Crimp
B 903-577P-51S Gold Gold Crimp Crimp
B2 903-401P-51S Gold Gold Crimp Solder
B2 903-579P-51S Gold Gold Crimp Crimp
B2 903-579P-51S1 Nickel Gold Crimp Crimp
Angle Plugs
Plating Termination
Cable Group Part Number Body Contact Body Contact Description
A 903-291P-51A Gold Gold Crimp Solder
A 903-291P-51A1 Gold Gold Crimp Solder Zinc Diecast Body
A 903-368P-51A1 Nickel Gold Crimp Solder
B 903-289P-51A Gold Gold Crimp Solder
B 903-367P-51A Nickel Gold Crimp Solder
B 903-367P-51A2 Nickel Gold Crimp Solder
B2 903-369P-51A2 Nickel Gold Crimp Solder
SMB
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Amphenol® RF: 800-627-7100
SMB
SMB
Straight Bulkhead Jacks
Plating Termination
Cable Group Part Number Body Contact Body Contact
B2 903-505J-51S1 Gold Gold Crimp Solder
B2 903-505J-51S Gold Gold Crimp Solder
L2 903-659J-51S Gold Gold Solder Solder
Angle Bulkhead Jacks
Plating Termination
Cable Group Part Number Body Contact Body Contact
B 903-422J-51A Gold Gold Crimp Solder
B2 903-683J-51A Gold Gold Solder Solder
B2 903-422J-51A2 Gold Gold Crimp Solder
50Ω Receptacles
Straight Front Mount Bulkhead Jacks
Plating
Part Number Body Contact Terminal Type
903-406J-51R Gold Gold Solder Cup
903-402J-51R Gold Gold Blunt Post
Angle Front Mount Bulkhead Jacks
Plating
Part Number Body Contact Terminal Type
903-416J-51R Gold Gold Solder Cup
Straight Rear Mount Bulkhead Jacks
Plating
Part Number Body Contact Terminal Type
903-305J-51R Gold Gold Solder Cup
Straight Recessed Mount Bulkhead Jacks
Plating
Part Number Body Contact Terminal Type
903-407J-51R Gold Gold Solder Cup
50 Ω Cable Connectors (continued)
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Amphenol® RF: 800-627-7100 SMB
50Ω Printed Circuit Board Connectors
Straight Plugs
Plating
Part Number Body Contact Terminal Type Description
903-410P-53P Gold Gold Blunt Post For .360” (9mm) Bd. Spacing/Four Legs
903-409J-53P Gold Gold Blunt Post For .360” (9mm) Bd. Spacing/Four Legs
Accessories
SMB/SMC Accessories: Jam Nuts
Part Number Description
903-10408-1 SMB/SMC Gold Plated Nut Hex, Bulk pack version
SMB/SMC Accessories: Lockwashers
Part Number Description
903-10409-1 SMB/SMC Gold Plated Lockwasher, Bulk pack version
Angle Bulkhead Jacks
Plating
Part Number Body Contact Terminal Type Description
903-413J-51A Gold Gold Blunt Post Four Legs/Leak Tight
903-373J-51A Gold Gold Blunt Post Four Legs/Leak Tight
Straight Bulkhead Jacks
Plating
Part Number Body Contact Terminal Type Description
903-375J-53P Nickel Gold Blunt Post Four Legs
903-518J-51P Gold Gold Blunt Post Four Legs
903-515J-51P Matte Tin Gold Blunt Post Four Legs
SMB
Straight Jacks
Plating
Part Number Body Contact Terminal Type Description
903-415J-51P Gold Gold Blunt Post Four Legs
903-499J-51P2 Gold Gold Blunt Post Four Legs
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Amphenol® RF: 800-627-7100
SMB
SMB
75 Ω Cable Connectors
Straight Plugs
Plating Termination
Cable Group Part Number Body Contact Body Contact
B 903-502P-71S Nickel Gold Crimp Solder
B1 903-152P-71S3 Gold Gold Crimp Solder
B1 903-575P-71S Nickel Gold Crimp Solder
B1 903-660P-71S Gold Gold Crimp Solder
B3 903-574P-71S Nickel Gold Crimp Solder
I2 903-152P-71S7 Gold Gold Crimp Solder
I2 903-663P-71S Gold Gold Crimp Solder
K3 903-152P-71S Gold Gold Crimp Solder
Angle Plugs
Plating Termination
Cable Group Part Number Body Contact Body Contact
B1 903-661P-71A Gold Gold Crimp Solder
B1 903-662P-71A Nickel Gold Crimp Crimp
Straight Bulkhead Jacks
Plating Termination
Cable Group Part Number Body Contact Body Contact
B1 903-108J-71S Gold Gold Crimp Solder
75Ω Receptacles
Straight Bulkhead Jacks
Plating
Part Number Body Contact Termination Type Description
903-382J-71R Gold Gold Solder Cup Rear Mount
903-675J-71S Gold Gold Solder Cup Panel Threaded
45
Amphenol® RF: 800-627-7100 SMB
75Ω Printed Circuit Board Connectors
Straight Plugs
Plating
Part Number Body Contact Termination Type Description
903-522P-71P Gold Gold Blunt Post Four Legs, Slide-On
Angle Jacks
Plating
Part Number Body Contact Termination Type Description
903-585J-71A Nickel Gold Blunt Post Four Legs
903-519J-71P Gold Gold Blunt Post Four Legs
Edge Mount Jacks
Plating
Part Number Body Contact Termination Type Description
903-518J-71P Gold Gold Blunt Post Four Legs
Straight Jacks
Plating
Part Number Body Contact Termination Type Description
903-523J-71P Nickel Gold Blunt Post Four Legs
SMB
46
Cable Group Listing
Cable Group Cable Type
ARG-178, 196
BRG-174, 188A, 316, Belden 7805
B1 RG-179, 187, Belden 9221
B2 RD-188/U, RD-316/U
B3 RD-179/U, AT&T 19224L2
C RG-58, 58A, 58C, 141, 303, LMR195, Belden 7806A, 9907
C1 RG-55, 142, 223, 400
C2 LMR200, Belden 7807A
DRG-58/U Plenum, Thinnet, RG-122/U, Belden 88240, 89907
ERG-59, 62, 140, 210, Belden 8241, 8263, 8279, 9209
E1 RG-59/U 20 AWG center conductor, Belden 1426A, 1505A, 9100, 9278
E2 RD-59/U, Belden 8281, 9141, 9231
E3 RG-59/U Quad Shield, Belden 1152A
FRG-59/U Plenum, Belden 1560A, 9259, 82259, 89259, 88241
F1 RG-59/U Plenum 20 AWG center conductor, Belden 82108
G1 RG-6, 143, 212
G2 8X, LMR240, Belden 7808A, 9258
G3 LMR400, Belden 7810A, 8214, 9913
G4 RG-8, 8A, 9, 87A, 213, 214, 225, 393
G5 RD-6/U
HRG-11
H1 Belden 1694A, 9248
H2 Belden 1859A, 7731, 8213, 9292
H3 RG-54A/U
IAT&T 734A, Belden 1505A
I2 AT&T 735A, Belden 735A1
JQuad 59 headend cable
KLMR600
K2 Belden 1695A
K3 RG-122, 180, 195, Belden 1855, 1865A, 8218
L.141 semi-rigid, RG-402/U
L2 .085, .086, .087 semi-rigid, RG-405/U
L3 .250 semi-rigid
L4 .047 semi-rigid, Belden 1674
M1/2 inch annular corrugated
M1 1 1/4 inch annular corrugated
M2 1 5/8 inch annular corrugated
M3 7/8 inch annular corrugated
N1/4 Helical
N1 3/8 Helical
N2 1/2 Helical
N3 7/8 inch SFC
P1 .81 mm OD micro-cable
P2 1.13 mm OD micro-cable, TCB-068
P3 1.32 mm OD micro-cable
P4 1.37 mm OD micro-cable