KH-SSMA-KE PCB-Mount SSMA Straight Female Connector: High-Temperature, Low-Loss RF Connector

In the fields of RF communication, intelligent measurement and control, and IoT terminals, the stability of PCB-level signal transmission, space utilization efficiency, and environmental durability directly determine the overall performance of the entire system. As electronic devices continue to evolve toward miniaturization and high-density integration, limited PCB space places increasingly demanding requirements on RF connector components. As a high-performance PCB-mount SSMA core component, the Kinghelm KH-SSMA-KE straight female RF coaxial connector addresses key challenges such as limited wiring space in miniature RF devices, high-frequency signal loss, and performance degradation under extreme temperature conditions through its compact structure, excellent high-frequency characteristics, and reliable temperature resistance. It has become a mainstream choice for PCB-side SSMA RF connections.

Kinghelm KH-SSMA-KE Product Image

SSMA is a miniaturized SMA-derived RF interface featuring a smaller size and greater suitability for compact PCB layouts. The KH-SSMA-KE is a standard straight female connector with a DIP through-hole package, specifically designed for PCB soldering installation. As a standardized PCB-mount SSMA component, it offers simple assembly—direct insertion into the PCB followed by soldering completes the installation. It is compatible with automated production lines, effectively improving mass production efficiency. With a single-unit gross weight of only 1.2g, its lightweight design adds minimal load to the equipment and perfectly meets the lightweight design requirements of portable wireless modules, miniature test instruments, and other compact products. Compared with traditional RF connectors that often occupy significant board space, this PCB-mount SSMA connector effectively saves PCB layout area and enables engineers to achieve higher-density circuit design.

Electrical performance is the core indicator of an RF connector. The KH-SSMA-KE strictly complies with RF industry standards and adopts a 50Ω characteristic impedance, ensuring impedance matching with most wireless communication modules and RF test equipment to reduce signal reflection and distortion at the source. Its operating frequency range covers 0–6GHz, supporting various commonly used frequency bands in IoT wireless transmission, short-range RF communication, signal detection, and measurement applications. One connector can meet the development requirements of multiple types of equipment, offering excellent versatility.

The full-band VSWR of ≤1.2 is a direct reflection of its low-loss transmission capability. A lower voltage standing wave ratio indicates reduced signal reflection loss and higher RF energy transmission efficiency, ensuring stable signal performance during long-term operation and improving the accuracy and reliability of communication and measurement data. In terms of electrical safety, the dielectric withstand voltage reaches 750V, while the insulation resistance is 1000MΩ. Its excellent insulation capability helps resist interference in complex electromagnetic environments and reduces the risk of breakdown and short circuits. The product also features precisely controlled contact resistance, with 5mΩ for the inner conductor and 2.5mΩ for the outer conductor. The extremely low contact resistance reduces transmission heat generation and power loss, maintaining stable connection performance during continuous operation and significantly lowering equipment failure rates.

Many outdoor and industrial devices are exposed to long-term temperature fluctuations. This PCB-mount SSMA straight female connector features a wide operating temperature range of -40℃ to +125℃. Whether used in harsh cold outdoor environments or high-temperature conditions inside enclosed equipment housings, the connector materials maintain structural integrity and stable performance without deformation or degradation. Its high-temperature resistance provides outstanding reliability. The mechanical performance has also undergone strict verification, with an effective mating cycle life of up to 500 times. Even after repeated plugging, unplugging, debugging, and maintenance operations, it continues to maintain reliable contact performance, making it suitable for test instruments requiring frequent connection cycles as well as industrial terminals designed for continuous operation. The product adopts a straight, positive-polarity pin structure, ensuring secure soldering and resistance to vibration and loosening, allowing it to withstand vibration conditions in automotive RF equipment and industrial measurement and control systems.

From a production and application perspective, the KH-SSMA-KE is supplied in bag packaging, providing effective protection during transportation and storage while preventing terminal damage and oxidation. Supported by Kinghelm’s comprehensive production quality control system, the components feature high consistency in electrical parameters, eliminating the need for individual adjustment during large-scale assembly and helping enterprises shorten product development and mass production cycles. The standard through-hole package is compatible with mainstream PCB soldering processes and can be used in both semi-automatic and fully automated production lines, reducing manual assembly errors and lowering manufacturing costs.

With its compact structure, wideband low-loss transmission, high and low temperature resistance, and convenient installation, the KH-SSMA-KE PCB-mount SSMA straight female connector offers a wide range of applications. It is widely used in wireless communication modules, IoT RF terminals, RFID identification devices, RF testing and measurement instruments, miniature radar modules, automotive RF systems, and intelligent device communication units. Facing the trend toward increasingly compact equipment design, it enables engineers to build reliable RF signal paths within limited PCB space while balancing product size and communication performance.

Kinghelm KH-SSMA-KE Specification

In summary, the Kinghelm KH-SSMA-KE straight female RF connector is a practical and reliable PCB-mount SSMA solution. Combining miniature dimensions, 6GHz wideband transmission capability, low VSWR and low-loss performance, a broad operating temperature range, and long mechanical service life, it not only meets hardware engineers’ requirements for compact layout design but also ensures high-quality RF signal transmission. Across consumer wireless devices, industrial measurement and control systems, RF testing applications, and other fields, the KH-SSMA-KE provides dependable PCB-side RF connectivity and serves as a trusted precision connector choice for miniature RF equipment development.

About Kinghelm

Shenzhen Kinghelm Electronics Co., Ltd.（www.kinghelm.net）has technical backbones from Tsinghua University and UESTC, and has introduced overseas returnee professionals. Kinghelm is able to develop highly reliable and high-performance antenna and connector products.KH series products of "Kinghelm" brand include Beidou/GPS antennas, RF adapter connectors, plug connector, electrical data connectors, terminals, and customized vehicle harnesses, industrial / medical connectors, and special antenna connectors."Kinghelm connects world", Kinghelm has grown with the development of China's Beidou industry. Starting from supplying Beidou/GPS dual mode antennas, IPEX terminals, and RF adapter cables for automotive manufacturers, Kinghelm has continuously developed products. Currently, it has a series of WiFi, Bluetooth, NB-loT, LoRa, Zigbee, UWB, and GSM antennas, RFID tags, RF adapter cables, standard microwave antennas, vehicle grade SMA, SMB, FAKRA holders, coaxial cables, and can customize non-standard antenna connectors based on customer drawings or samples.

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