SIPU RF Technology Co., Ltd. is a professional manufacturer of sub-miniature RF coaxial connectors for high density microwave system applications. SIPU-SSMA-KFD7 is an SSMA Female Gold Plated Flange Mount Connector. This connection provides excellent performance from DC to 30 GHz with an outstanding VSWR of ≤1.05+0.012F(GHz) and insertion loss as low as ≤0.05√F(GHz)dB. Gold plated brass outer conductor with beryllium bronze center contact for contact resistance less than 4.0mΩ (center) and 2.5mΩ (outer). The flange-mount design provides for stable panel mounting and the PTFE dielectric allows operation from -65°C to +125°C. 500 mating cycles rating with 750V dielectric withstanding voltage This connection is built to the exacting standards of aerospace, defence and precision test equipment.
The flange-mount style offers improved mechanical stability compared to typical PCB-mount options. You'll appreciate the secure two-hole or four-hole mounting styles that provide the best grounding and prevent signal drift in high vibration situations.
Gold plating all contact surfaces provides excellent corrosion resistance and minimal passive intermodulation (PIM). This surface treatment provides continuous electrical performance throughout the life of the connection for 500 cycles.
The microstrip compatible design eases the PCB layout and minimises the signal route length. The connection improves signal integrity for your RF modules and takes up minimum board space, making it perfect for high-density and small setups.
The dielectric substance PTFE has steady electrical properties throughout the temperature range. You may always count on the impedance match of 50Ω even in the temperature cycling of -65℃ to +125℃.
| Parameter | Value |
|---|---|
| Model | SIPU-SSMA-KFD7 |
| Characteristic Impedance | 50Ω |
| Frequency Range | DC-30GHz |
| Insertion Loss | ≤0.05√F(GHz)dB |
| VSWR | ≤1.05+0.012F(GHz) |
| Dielectric Withstanding Voltage | 750V |
| Insulation Resistance | ≥1,000MΩ |
| Center Contact Resistance | ≤4.0mΩ |
| Outer Contact Resistance | ≤2.5mΩ |
| Mating Cycles | 500 times |
| Operating Temperature | -65℃ to +125℃ |
| Orientation | Straight |
| Interface Gender | Female |
| Outer Conductor Material | Brass, gold plated |
| Center Conductor Material | Beryllium bronze, gold plated |
| Dielectric Material | PTFE |
SIPU RF Technology implements comprehensive quality verification at every production stage to ensure your connector meets aerospace-grade reliability standards.

Each production batch undergoes dielectric withstanding voltage testing using specialized insulation testers. We verify that every unit meets the 750V specification and exceeds 1,000MΩ insulation resistance requirements.
Plating quality receives particular attention through batch-level inspection. Our technicians measure gold layer thickness using precision instruments and conduct adhesion tests to confirm the plating bond strength meets durability requirements.
Every batch completes RoHS environmental compliance testing. You receive connectors that meet international environmental standards without compromise to electrical performance.
The beryllium bronze center contact undergoes dimensional verification to ensure proper mating force and contact resistance. This guarantees reliable electrical continuity across all 500 rated mating cycles.

The SSMA Female Gold Plated Flange Mount Connector’s minimal weight and flange-mount stability are advantageous for your aircraft and satellite communication systems. The robust mechanical interface is designed to survive launch shocks and provide signal integrity in zero gravity situations.
This connection is used in defence and electronic warfare equipment for high frequency shielding in small enclosures. The contacts are gold plated to avoid oxidation during long term field deployments in extreme weather conditions.
This connection is used in test and measurement labs for high precision RF instruments. Together, the PTFE dielectric and gold plating ensure the calibration accuracy is maintained even in temperature controlled rooms and high humidity settings.
These connections are used in 5G infrastructure equipment and particularly in base station modules where space restrictions require miniaturised electronics. This microstrip design allows for direct PCB installation with good RF performance.
The rugged structure and stable electrical properties of the connectors are critical for industrial electronics systems that need dependable high frequency connections in automated production applications.

Q: What advantages does the flange-mount design provide over standard PCB-mount connectors?
A: The flange mount offers superior mechanical stability through direct panel attachment. You achieve better grounding performance and eliminate signal degradation from PCB flexing. This design excels in applications requiring reliable connections under vibration or thermal stress.
Q: How does gold plating enhance connector performance?
A: Gold plating provides excellent corrosion resistance and maintains low contact resistance throughout the connector's operational life. You benefit from consistent electrical performance and reduced passive intermodulation, critical for high-frequency applications and long-term reliability.
Q: What torque specifications should I follow during installation?
A: The recommended coupling torque typically ranges from 3 to 5 inch-pounds for the mating interface. Flange mounting screws require appropriate torque based on screw size to secure the connector without deforming the housing or compromising electrical performance.
Q: Can this connector withstand extreme temperature cycling?
A: Yes, the PTFE dielectric and precision-engineered materials maintain performance from -65℃ to +125℃. Your system remains operational through thermal shocks and extended exposure to temperature extremes common in aerospace and outdoor installations.
Q: How many mating cycles can I expect before replacement?
A: This product supports 500 mating cycles while maintaining specified electrical performance. The hard-gold alloy plating with nickel underplate resists wear, ensuring consistent contact resistance throughout its service life.

Contact our SSMA Female Gold Plated Flange Mount Connector's team at info@sipuconn.com for product selection assistance, samples, or technical consultation on your next project.
Contact us directly for customized solutions, quotations and long-term strategic cooperation.