Mini-75 Ohm SMB Connectors
Specifications
INCHES (MILLIMETERS)
CUSTOMER DRAWINGS AVAILABLE UPON REQUEST
ELECTRICAL RATINGS
Impedence:
75 ohms
Frequency Range:
0-2 GHz
VSWR:
f = GHz
RG-179, RG-59, Belden 735A cable:
Straight cabled connectors ............................ 1.25 + .04f
Right angle cabled connectors ...................... 1.35 + .04f
Adapters .......................................................................................... 1.20 + .04f
Type N Adapters ............................................................................. 1.05 +. 01f
Matching pad 50 ohm/75 ohm .......................................................... 1.05 + .1f
Loads .............................................................................................. 1.05 + .01f
Uncabled receptacles, opens, shorts ......................................................... N/A
Working Voltage:
(Vrms maximum)†
Connectors for Cable Type
Sea Level
70K Feet
RG-179, RG-59, Belden 735A,
uncabled receptacles, adapters ........................... 335
85
Open, shorts, loads, matching pad .......................... N/A
N/A
Dielectric Withstanding Voltage:
(VRMS minimum at sea level)†
Connectors for RG-179, RG-59, Belden 735A,
uncabled receptacles, adapters ........................................................ 1000
Open, shorts, loads, matching pad ......................................................... N/A
Corona Level:
(Volts minimum at 70,000 feet)†
Connectors for RG-179, RG-59, Belden 735A ....................................... 250
Uncabled receptacles, adapters, open, shorts, loads, matching pad: N/A
Electrical Length:
Open + 1.5
o
(+ 5.2
o
relative to short)
Short + 1.5
o
(+ 5.2
o
relative to open)
Adapters + 5.2
o
(N/A for Jack-Bulkhead Jack and N Types)
Insertion Loss:
(dB maximum, tested at 1.5 GHz)
Straight cable connectors ............................................................... 0.30 dB
Right angle cable connectors ......................................................... 0.60 dB
Matching pad .......................................................................... 6 dB nominal
Uncabled receptacles, adapters, opens, shorts, loads .......................... N/A
Insulation Resistance:
1000 megohms minimum
Contact Resistance:
(milliohms maximum)
After
Initial
Environmental
Center contact (straight cabled connectors,
uncabled receptacles, opens, shorts, loads) ....... 6.0
8.0
Center contact (right angle cabled
connectors and adapters) .................................. 12.0
16.0
Outer contact (gold plated connectors) ................... 1.0
1.5
Outer contact (nickel plated connectors) ................ 2.5
3.5
Braid to body (gold plated connectors) ................... 1.0
N/A
Braid to body (nickel plated connectors) ................. 2.5
N/A
RF Leakage:
(dB minimum tested at 2.5 GHz)
Cable connectors .............................................................................. -55 dB
Uncabled receptacles, adapters opens, shorts, loads,matching pad...N/A
RF High Potential Withstanding Voltage:
(Vrms minimum, tested at
4 and 7 MHz)†
Connectors for RG-179, RG-59, Belden 735A ....................................... 700
Uncabled receptacles and adapters ....................................................... 600
Opens, shorts, loads, matching pad ....................................................... N/A
Power Rating:
(Loads and matching pad only) 1.0 watt at +25
°
C derated
linearly to .5 watt at +125
°
C
MECHANICAL RATINGS
Engagement Design:
MIL-C-39012, Series SMB
Engagement/Disengagment Force:
2 pounds minimum to
14 pounds maximum axial force
Contact Retention:
4 lbs. minimum axial force (captivated contacts)
1 inch-ounce minimum torque (uncabled receptacles)
Cable Retention:
Axial Force*
Torque
(pounds)
(in-oz)
Connectors for RG-179, Belden 735A ............... 20
N/A
Connectors for RG-59 ........................................ 40
N/A
* or cable breaking strength whichever is less.
Durability:
500 cycles minimum
ENVIRONMENTAL RATINGS (Meets or exceed the applicable paragraph
of MIL-C-39012)
Temperature Range:
- 65
°
C to +165
°
C -- Connectors and adapters
- 65
°
C to +125
°
C -- Loads, matching pad
20
°
C to 26
°
C -- Opens, shorts
Thermal Shock:
MIL-STD-202, Method 107, Condition B
(N/A opens, shorts, loads, matching pad)
Corrosion:
MIL-STD-202, Method 101, Condition B
(N/A opens, shorts, loads, matching pad)
Shock:
MIL-STD-210, Method 213, Condition B
(N/A opens, shorts, loads, matching pad)
Vibration:
MIL-STD-202, Method 204, Condition B
(N/A opens, shorts, loads, matching pad)
Temperature Coefficient:
(Loads only) + 300 ppm/
°
C
MATERIAL SPECIFICATIONS
Bodies:
Brass per QQ-B-626, gold plated** per MIL-G-45204 .00001" min.
or nickel plated per QQ-N-290
N type adapters stainless steel per QQ-S-763, passivated per
MIL-F-14072
Contacts:
Male & Female - beryllium copper per QQ-C-530, gold plated per
MIL-G-45204 .00003" min.
Insulators:
PTFE fluorocarbon per ASTM D 1710 and ASTM D 1457
Expansion Caps:
Brass per QQ-B-613, gold plated per MIL-G-45204
.00001" min. or nickel plated per QQ-N-290
Crimp Sleeves:
Copper per WW-T-799, gold plated per MIL-G-45204
.00001" min. or nickel plated per QQ-N-290
Mounting Hardware:
Brass (nuts) per QQ-B-626 or phosphor bronze
(lockwashers) QQ-B-750, gold plated per MIL-G-45204 .00001" min. or
nickel plated per QQ-N-290
** All gold plated parts include a .00005" min. nickel underplate barrier layer.
Avoid user injury due to misapplication. See safety advisory definitions inside front cover.
MATING ENGAGEMENT FOR MINI-75 OHM SMB SERIES (INTERMATABLE WITH STANDARD 50 OHM SMB)
Plug
Jack
Plug
Jack
NOTES:
1. ID of contact to meet
VSWR, mating charac-
teristics and connector
durability when mated
with a dia .019-.021
(0.48/0.53) male con-
tact.
2. Must meet the force to
engage and disengage
when mated with mating
part.
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