JingCheng QMA Female Straight 4-Hole Flange Connector, Round Post

Product Code


Contact Attachment

Round Post


Standard Grade


The QMA connector series was developed as a quick mating replacement for the standard SMA connector. With identical internal construction, the connector exhibits the same RF performance characteristics and mechanical durability with the added benefit of a 360º rotating snap-on locking interface. This snap-locking design improves packing density as no torque wrench clearance is necessary. While operating up to 18 GHz, like SMA the QMA connector exhibits best performance up to 6 GHz.

4-Hole Flange, Front Mount

Connector is fed through and mounted from the front. Used to transmit signal from internal circuitry through a panel, using a flange with four holes to accommodate mounting screws or bolts. Best suited for use with thin panels.

RF Connector Technical Data
Series Body Shape
4-Hole Flange, Front Mount
RF Performance
Operating Freq. Range 0 to 6.00 GHz Input Impedance
50 Ω
VSWR No Data Insertion Loss No Data
Physical Characteristics
Body Material(s)
Contact Material(s)
Body Plating
Contact Plating
Dimensions No Data Operating Temperature -40 to 85 °C
Weight No Data Mating Cycles >500

YangZhou JingCheng

YangZhou JingCheng Electronics logo

Established in 1999, Yangzhou Jingcheng is a manufacturer of high quality RF components including connectors, cable assemblies, and passive components. On the beautiful bank of the ancient Yangzhou river lies Yangzhou Jingcheng Electronics, situated in the economic development zone in the south of Yangzhou city.

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