MCX - 75 Ohm Connectors
Specifications
INCHES (MILLIMETERS)
CUSTOMER DRAWINGS AVAILABLE UPON REQUEST
Straight Cabled
Right Angle
Connectors
Cabled Connectors
RG-179 cable ............................... 1.13 + .04f
1.07 + .04f
In-series adapters ........................ 1.07 + .03f
Between series adapters, loads ... 1.05 + .01f
Matching pad ............................... 1.05 + .05f
Uncabled receptacles ..................................................................... N/A
Working Voltage:
(Vrms maximum)†
Connectors for Cable Type
Sea Level
70K Feet
RG-179 ................................................... 335
85
Uncabled receptacles, adapters ............. 335
85
Loads, matching pad .............................. N/A
Dielectric Withstanding Voltage:
(VRMS minimum at sea level)
Connectors for RG-179 ............................................................ 1000
Uncabled receptacles, adapters ............................................... 1000
Loads, matching pad .................................................................. N/A
Corona Level:
(Volts minimum at 70,000 feet)†
Connectors for RG-179 .............................................................. 250
Uncabled receptacles, adapters ................................................. 250
Loads, matching pad .................................................................. N/A
Insertion Loss:
(dB maximum, tested at 1 GHz)
Straight cable connectors ....................................................... 0.1 dB
Right angle cable connectors ................................................. 0.2 dB
Uncabled receptacles, adapters, matching pad ......................... N/A
Insulation Resistance:
10,000 megohms minimum
After
Contact Resistance:
(milliohms maximum)
Initial
Environmental
Center contact (straight cabled connectors,
uncabled receptacles) ....................................... 5.0
8.0
Center contact (right angle cabled connectors) .... 5.0
15.0
Center contact (loads, matching pads) ................ N/A
Outer contact ........................................................ 1.0
1.5
Braid to body (gold plated connectors) ................. 1.0
N/A
RF Leakage:
(dB typical tested at 2.5 GHz)
Cable connectors ....................................................... -55 dB typical
Uncabled receptacles, adapters, loads, matching pads ............. N/A
RF High Potential Withstanding Voltage:
(Vrms minimum, tested at 4
and 7 MHz)†
Connectors for RG-179 .............................................................. 700
Uncabled receptacles, adapters ................................................. 600
Loads, matching pad .................................................................. N/A
ELECTRICAL RATINGS
Impedance:
75 Ohms
Frequency Range:
0-6 GHz
VSWR:
(f = GHz)
Power Rating:
(Loads and matching pad only) 1.0 watt at +25°C derated
linearly to 0.5 watt at +125°C
MECHANICAL RATINGS
Engagement Design:
Compatible with CECC 22220, Series MCX 50 Ohm
Engagement Force:
5.6 pounds maximum axial force
Disengagement Force:
8 pounds maximum axial force, 1 pound min.
Contact Retention:
2.3 pounds min. axial force (captivated contacts)
1 inch-ounce min. torque (uncabled receptacles)
Cable Retention:
Axial Force*
Torque
(pounds)
(in-oz)
Connectors for RG-179 ............................... 20
N/A
Connectors for RG179 DS .......................... 25
N/A
*or cable breaking strength whichever is less
ENVIRONMENTAL RATINGS (Meets or exceed the applicable
paragraph of MIL-C-39012)
Durability:
500 cycles minimum
Temperature Range:
All connectors: - 65°C to + 165°C
Loads and matching pads: - 65°C to + 125°C
Thermal Shock:
MIL-STD-202, Method 107, Condition F
Temperature Coefficient:
Loads and matching pad: +/- 300ppm/
o
C
Corrosion:
MIL-STD-202, Method 101, Condition B
Shock:
MIL-STD-202, Method 213, Condition B
Vibration:
MIL-STD-202, Method 204, Condition B
Moisture Resistance:
MIL-STD-202, Method 106
MATERIAL SPECIFICATIONS
Bodies:
Brass per QQ-B-626, gold plated** per MIL-G-45204 .00001”
min. Interface spring - beryllium copper per QQ-C-530, gold plated
per MIL-G-45204 .00003" min.
Contacts:
Male - brass per QQ-B-626 or beryllium copper per QQ-C-
530, gold plated per MIL-G-45204 .00003" min.
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.
Crimp Sleeves:
Copper per WW-T-799, gold plated per MIL-G-45204
.00001" min.
Mounting Hardware:
Brass (nuts) per QQ-B-626 or phosphor bronze
(lockwashers) QQ-B-750, gold plated per MIL-G-45204 .00001" min.
†Avoid user injury due to misapplication.
See safety advisory definitions inside front cover.
** All gold plated parts include a .00005" min. nickel underplate barrier layer.
MATING ENGAGEMENT FOR 75 OHM MCX SERIES (INTERMATABLE WITH CECC 22220 50 OHM MCX)
JACK
PLUG
JACK
PLUG
NOTES
1. ID of contact to meet VSWR mating characteristics and connector durability when
mated with a dia. .019-.021 (0.48-0.53) male contact.
2. Must meet the force to engage and disengage when mated with mating part.
3. Interface shall intermate with MCX 50 Ohm interface per CECC 22220.
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