The Micro-Miniature CoaXial (MMCX) is a miniaturised version of the MCX RF connector and features snap-on coupling. The series is only 2.4 mm in diameter, ideal for lightweight and space-limited applications. MMCX has the same inner and outer contact interface dimensions as SMB but 45% smaller. The connector utilises a slot-less design to minimise RF leakage, and has been standardised under IEC 61169-52 specification.

Alias
Micro-Miniature CoaXial
Impedance
50 Ω
Max. Operating Frequency
6.0 GHz
Mechanism
Snap-on Coupling

History

The connector was developed in the 1990s presumably by Huber+Suhner who developed the original MCX connector.

Applications

MMCX connectors are widely used in GPS, modems, and Wi-Fi hardware due to their low cost and good broadband performance DC to 6 GHz, covering most RF applications. Also available in a 75 Ω variant.

Male Dimensions

MMCX Male CAD drawing
Legend Min Max
A
2.3500
2.4000
B
1.8000
C
1.5800
1.6200
D
2.8300
F
0.2000
G
0.3800
0.4200
H
0.0000
0.2500
I
1.2300
J
2.0800
2.1200
K
2.7000
Alpha (°)
30.0000
Beta (°)
29.0000
31.0000

Female Dimensions

MMCX Female CAD dimensions
Legend Min Max
A
2.4100
B
0.7000
0.7000
D
2.8800
2.9200
E
3.0000
3.0400
G
1.4000
H
0.9000
1.2000
I
1.5700
1.6300
J
2.2600
2.3400
K
2.6900
L
0.1400
0.2300
Alpha (°)
28.0000
32.0000
Beta (°)
68.0000
72.0000
Gamma (°)
13.0000
17.0000