Amphenol RF
SMB
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-STD348. 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 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. 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
36
SMB
Amphenol® RF: 800-627-7100
SMB
50 Ω SMB Specifications
Electrical
Impedance
Frequency range
VSWR
RF-leakage
Voltage rating (at sea level)
Contact resistance
Insulation resistance
Insertion loss maximum
Dielectric withstanding voltage
50 Ω
DC - 4 GHz (usable to 10 GHz)
1.2 max. @ DC - 4 GHz
1.5 max. @ 4 - 10 GHz
55 dB minimum @ 1 GHz (flexible cable)
≥ 250 Vrms (depending on cable)
center contact: ≤ 6 mΩ
outer contact: ≤ 2.5 mΩ
braid to body: ≤ 1 mΩ
5,000 MΩ minimum
0.3 dB @ 1.5 GHz
1,000 Vrms (at sea level)
Mechanical
Mating
Braid/Jacket cable affixment
Center conductor cable affixment
Captivated contacts
Engagement force
Disengagement force
Durability (matings)
Snap-on coupling (MIL-STD-348)
Hex crimp
Solder
All, unless noted otherwise
≤ 14.2 lbs (63N)
≥ 1.8 lbs (8N)
500 cycles minimum
Environmental
Temperature range
Thermal shock
Moisture resistance
Corrosion
Vibration
Mechanical shock
-65°C to +165°C
MIL-STD-202, method 107, cond. B
MIL-STD-202, method 106
MIL-STD-202, method 101, cond. B
MIL-STD-202, method 204, cond. D
MIL-STD-202, method 213, cond. B
Amphenol® RF: 800-627-7100
SMB
37
SMB
50 Ω SMB Specifications (continued)
Material
Body and outer contacts
Male contact
Female contact
Crimp ferrule
Insulator
Body: brass or zinc alloy (ASTM-B86-71), gold or nickel plated
Brass, gold plated
Beryllium copper or phosphor bronze, gold plated
Copper or brass, nickel or gold plated
PTFE
Military
MIL-C-22557A
where applicable
Plug
Jack
.141/.131
.141 MIN
REF PLANE
.141 MIN
.117
MAX
.117
MIN
.010 MAX
.007
MAX
.007/.037
.007 MIN
38
SMB
LC
.065
MIN
ø.021/.019
ø.146 MAX
ø.081 MAX
REF PLANE
ø.082 MIN
.000 MIN
.010 MIN
.064 MAX
.052
MIN
Amphenol® RF: 800-627-7100
SMB
75 Ω SMB Specifications
Electrical
Impedance
Frequency range
VSWR
RF-leakage
Voltage rating (at sea level)
Contact resistance
Insulation resistance
Insertion loss maximum
Dielectric withstanding voltage
75 Ω
DC - 4 GHz
1.4 max. @ DC - 4 GHz
55 dB minimum @ 1 GHz (flexible cable)
≥ 250 Vrms (depending on cable)
center contact: ≤ 6 mΩ
outer contact: ≤ 1 mΩ
braid to body: ≤ 1 mΩ
5,000 MΩ minimum
0.3 dB @ 1.5 GHz
1,000 Vrms (at sea level)
Mechanical
Mating
Braid/Jacket cable affixment
Center conductor cable affixment
Captivated contacts
Engagement force
Disengagement force
Durability (matings)
Snap-on coupling (MIL-STD-348)
Hex crimp
Solder
All, unless noted otherwise
≤ 14.2 lbs (63N)
≥ 1.8 lbs (8N)
500 cycles minimum
Environmental
Temperature range
Thermal shock
Moisture resistance
Corrosion
Vibration
Mechanical shock
-65°C to +165°C
MIL-STD-202, method 107, cond. B
MIL-STD-202, method 106
MIL-STD-202, method 101, cond. B
MIL-STD-202, method 204, cond. D
MIL-STD-202, method 213, cond. B
Amphenol® RF: 800-627-7100
SMB
39
SMB
75 Ω SMB Specifications (continued)
Material
Body and outer contacts
Male contact
Female contact
Crimp ferrule
Insulator
Body: brass or zinc alloy (ASTM-B86-71), gold or nickel plated
Brass, gold plated
Beryllium copper or phosphor bronze, gold plated
Copper or brass, nickel or gold plated
PTFE
Military
MIL-C-22557A
where applicable
Note: These characteristics are typical but may not apply to all connectors.
Plug
.141 MIN
.141 MIN
REF PLANE
.117
MAX
.007
MAX
.010 MAX
ø.130 MAX
.007/.037
.007 MIN
40
SMB
REF PLANE
.141/.131
.117 MIN
ø.244 MAX
Jack
.065 MIN
ø.021/.019
ø.131 MIN
.000 MIN
.064 MAX
.010 MIN
.052 MIN
Amphenol® RF: 800-627-7100
SMB
50 Ω Cable Connectors
Straight Plugs
Plating
Termination
Body
Contact
Cable Group
Part Number
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
Cable Group Part Number
Plating
Body
Contact
Termination
Body
Contact
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
Amphenol® RF: 800-627-7100
Description
SMB
41
SMB
50 Ω Cable Connectors (continued)
Straight Bulkhead Jacks
Plating
Cable Group Part Number
Body
Contact
B2
B2
L2
Gold
Gold
Gold
Gold
Gold
Gold
903-505J-51S1
903-505J-51S
903-659J-51S
Termination
Body
Contact
Crimp
Crimp
Solder
Solder
Solder
Solder
Angle Bulkhead Jacks
Plating
Cable Group Part Number
Body
Contact
B
B2
B2
Gold
Gold
Gold
Gold
Gold
Gold
903-422J-51A
903-683J-51A
903-422J-51A2
Termination
Body
Contact
Crimp
Solder
Crimp
Solder
Solder
Solder
50Ω Receptacles
Straight Front Mount Bulkhead Jacks
Plating
Part Number
Body
Contact
Terminal Type
903-406J-51R
903-402J-51R
Gold
Gold
Gold
Gold
Solder Cup
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
42
Part Number
Body
Contact
Terminal Type
903-407J-51R
Gold
Gold
Solder Cup
SMB
Amphenol® RF: 800-627-7100
SMB
50Ω Printed Circuit Board Connectors
Straight Plugs
Part Number
Plating
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
Straight Jacks
Plating
Part Number
Body
Contact
903-415J-51P
Gold
Gold
Terminal Type Description
Blunt Post
Four Legs
903-499J-51P2
Gold
Gold
Blunt Post
Four Legs
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
Angle Bulkhead Jacks
Part Number
Plating
Body
Contact
903-413J-51A
Gold
Gold
Blunt Post
Four Legs/Leak Tight
903-373J-51A
Gold
Gold
Blunt Post
Four Legs/Leak Tight
Terminal Type
Description
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
Amphenol® RF: 800-627-7100
SMB
43
SMB
75 Ω Cable Connectors
Straight Plugs
Plating
Termination
Body
Contact
Cable Group
Part Number
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
Cable Group
Part Number
B1
B1
Termination
Body
Contact
Body
Contact
903-661P-71A
Gold
Gold
Crimp
Solder
903-662P-71A
Nickel
Gold
Crimp
Crimp
Straight Bulkhead Jacks
Plating
Cable Group
Part Number
Body
Contact
B1
903-108J-71S
Gold
Gold
Termination
Body
Contact
Crimp
Solder
75Ω Receptacles
Straight Bulkhead Jacks
44
Plating
Contact
Part Number
Body
Termination Type
Description
903-382J-71R
Gold
Gold
Solder Cup
Rear Mount
903-675J-71S
Gold
Gold
Solder Cup
Panel Threaded
SMB
Amphenol® RF: 800-627-7100
SMB
75Ω Printed Circuit Board Connectors
Straight Plugs
Part Number
Body
903-522P-71P
Gold
Plating
Contact
Gold
Termination Type
Blunt Post
Description
Four Legs, Slide-On
Straight Jacks
Part Number
Body
903-523J-71P
Nickel
Plating
Contact
Gold
Termination Type
Description
Blunt Post
Four Legs
Termination Type
Description
Angle Jacks
Plating
Contact
Part Number
Body
903-585J-71A
Nickel
Gold
Blunt Post
Four Legs
903-519J-71P
Gold
Gold
Blunt Post
Four Legs
Termination Type
Description
Blunt Post
Four Legs
Edge Mount Jacks
Part Number
Body
903-518J-71P
Gold
Plating
Contact
Amphenol® RF: 800-627-7100
Gold
SMB
45
Cable Group Listing
Cable Group Cable Type
A
B
B1
B2
B3
C
C1
C2
D
E
E1
E2
E3
F
F1
G1
G2
G3
G4
G5
H
H1
H2
H3
I
I2
J
K
K2
K3
L
L2
L3
L4
M
M1
M2
M3
N
N1
N2
N3
P1
P2
P3
P4
46
RG-178, 196
RG-174, 188A, 316, Belden 7805
RG-179, 187, Belden 9221
RD-188/U, RD-316/U
RD-179/U, AT&T 19224L2
RG-58, 58A, 58C, 141, 303, LMR195, Belden 7806A, 9907
RG-55, 142, 223, 400
LMR200, Belden 7807A
RG-58/U Plenum, Thinnet, RG-122/U, Belden 88240, 89907
RG-59, 62, 140, 210, Belden 8241, 8263, 8279, 9209
RG-59/U 20 AWG center conductor, Belden 1426A, 1505A, 9100, 9278
RD-59/U, Belden 8281, 9141, 9231
RG-59/U Quad Shield, Belden 1152A
RG-59/U Plenum, Belden 1560A, 9259, 82259, 89259, 88241
RG-59/U Plenum 20 AWG center conductor, Belden 82108
RG-6, 143, 212
8X, LMR240, Belden 7808A, 9258
LMR400, Belden 7810A, 8214, 9913
RG-8, 8A, 9, 87A, 213, 214, 225, 393
RD-6/U
RG-11
Belden 1694A, 9248
Belden 1859A, 7731, 8213, 9292
RG-54A/U
AT&T 734A, Belden 1505A
AT&T 735A, Belden 735A1
Quad 59 headend cable
LMR600
Belden 1695A
RG-122, 180, 195, Belden 1855, 1865A, 8218
.141 semi-rigid, RG-402/U
.085, .086, .087 semi-rigid, RG-405/U
.250 semi-rigid
.047 semi-rigid, Belden 1674
1/2 inch annular corrugated
1 1/4 inch annular corrugated
1 5/8 inch annular corrugated
7/8 inch annular corrugated
1/4 Helical
3/8 Helical
1/2 Helical
7/8 inch SFC
.81 mm OD micro-cable
1.13 mm OD micro-cable, TCB-068
1.32 mm OD micro-cable
1.37 mm OD micro-cable
Cable Group Listing